Owner’s Manual
Delta PRE
Stereo Preamp/Processor
Contents
Welcome to the Classé family ..........................................................................4
Exceptional Design Features ............................................................................5
versatile connectivity .................................................................................5
superior performance ................................................................................5
clean, dedicated power .............................................................................5
room equalization and speaker control .....................................................5
flexible GUI ...............................................................................................5
network connectivity and streaming audio ................................................5
extraordinary longevity ..............................................................................5
Unpacking and Placement ............................................................................... 6
unpacking your Delta PRE .........................................................................6
Delta PRE placement considerations .........................................................6
warm-up/break-in period ...........................................................................7
operating voltage .......................................................................................7
Front Panel .......................................................................................................8
Rear Panel ......................................................................................................10
serial number ......................................................................................... 10
The Remote Control ....................................................................................... 14
Initial Setup .................................................................................................... 16
Using the Delta PRE ....................................................................................... 19
Source Selection ..................................................................................... 19
The Menu System ..........................................................................................20
System Setup .................................................................................................. 21
Source Setup .......................................................................................... 22
Enable Source .................................................................................. 22
Input Connector ............................................................................... 22
Source Name ................................................................................... 22
Configuration ................................................................................... 23
Input Offset ...................................................................................... 23
Pass-Thru ......................................................................................... 23
Digital Bypass .................................................................................. 23
Phono Setup .......................................................................................... 24
Remote Fkeys ......................................................................................... 24
Volume Setup ......................................................................................... 25
Max Volume .................................................................................... 26
Startup Volume ................................................................................ 26
Mute Setup....................................................................................... 26
Configuration Setup ............................................................................... 27
Configuration Name ........................................................................ 27
Configure Outputs ........................................................................... 27
Auxiliary Channels ........................................................................... 28
Display Setup ......................................................................................... 28
Brightness ........................................................................................ 28
Timeout ............................................................................................ 28
Network Setup ........................................................................................ 29
EQ Setup ................................................................................................ 29
Tone Control Setup ................................................................................. 30
DC Triggers ............................................................................................. 30
Headphones X-Feed ............................................................................... 31
Advanced Settings .................................................................................. 31
2
Tone Control ..................................................................................................32
Balance .......................................................................................................... 32
Configurations ................................................................................................32
Mono ............................................................................................................. 33
Status .............................................................................................................33
Firmware Updates .......................................................................................... 33
CAN-Bus ........................................................................................................ 34
features ................................................................................................. 34
hardware setup ..................................................................................... 34
using CAN-Bus ....................................................................................... 34
CAN-Bus amp features .......................................................................... 35
operate ................................................................................................... 35
Mute ....................................................................................................... 35
Global Standby ....................................................................................... 35
Global Dim ............................................................................................ 35
Other Status ............................................................................................ 36
Name ..................................................................................................... 36
Event Log ................................................................................................ 36
Network Sources ............................................................................................ 36
Apple AirPlay ................................................................................................. 37
DLNA .............................................................................................................38
Troubleshooting .............................................................................................39
network/streaming troubleshooting ......................................................... 41
Care & Maintenace ....................................................................................... 42
Specifications ................................................................................................. 43
Dimensions .................................................................................................... 49
Installation Worksheet ....................................................................................50
3
Welcome to the Classé family
Congratulations on your purchase of the Classé Delta PRE, a stereo preamp/
processor with reference-quality performance. It is the result of many years of
design experience, and we are sure that you will enjoy it for many years to come.
Classé values its relationships with our customers and intends on supplying the
highest level of support along with our product. Registering your product will
allow us to keep in touch and will ensure that you are notied regarding any
future updates or options which become available.
You can register online at https://classeaudio.com.
Please take a few moments now to register your new Classé
preamp/processor and record your serial number for future
reference.
Please note that your Classé warranty is valid only in the country of purchase;
for service in other countries please contact the local distributor. For details,
please consult the Warranty Card that comes with your unit
a word about installation Every eort has been made to make the Classé Delta PRE simple and
straightforward to install and use.
e size and shape of your room, its acoustics, and the associated equipment
you have chosen to use with your amplier all inuence the performance of your
system.
For this reason, we strongly encourage you to have your system
installed and calibrated by your dealer, whose experience,
training, and specialized equipment can make a profound
difference in the final performance of the system.
4
Exceptional Design Features
e Delta PRE is a stereo preamp/processor, designed for music lovers who
demand the ultimate in sonic performance from their audio system. Its
connectivity and processing power accommodate the ever increasing array of
music sources, allowing them to be accessed and enjoyed without compromise.
versatile connectivity e Delta PRE is a stereo preamp/processor with both balanced and single-
ended output connections. A comprehensive set of analog and digital inputs
and control interfaces enable compatibility with most contemporary audio
system equipment.
superior performance Advanced circuit topologies, component parts, and circuit layout techniques
combine for superior audio performance. e analog and digital signal paths
have been optimized to ensure superior performance from every source.
clean, dedicated power A highly rened linear power supply is used together with a newly developed
switch mode power supply to provide the clean, high-current power required for
best performance. Liberal use of local regulation provides clean, low impedance
access to power wherever and whenever needed.
room equalization
and speaker control
flexible GUI e front panel’s LCD touchscreen supports an extremely exible and
network connectivity
and streaming audio
All home audio systems are aected by room characteristics. Sound reections
and sound absorption can create dramatic variations in the performance of your
system, particularly in the lower frequencies. e Delta PRE features a system
of Parametric EQ lters which, in the hands of an experienced acoustician, can
help optimize the performance of your system.
Bass management allows one or two subwoofers to be added to augment
frequencies where the response from the Left and Right speakers may tend to
cancel each other. Together, these digital domain tools help deliver smooth and
accurate low frequency performance. Lastly, a sophisticated and exible digital
domain Tone/Tilt Control can be used to tweak the tonal balance of individual
recordings.
versatile graphical user interface (GUI) while maintaining a clean, uncluttered
appearance. e Delta PRE provides a range of controls that might otherwise
require dozens of buttons and knobs on the front panel. Despite this power and
exibility, it remains simple to operate in day-to-day use.
A rear panel Ethernet connection on the Delta PRE allows streaming audio
via Apple’s AirPlay and DLNA as well as full IP control via the Classé App
(available free of charge in the Apple App and Google Play stores) or home
automation systems.
extraordinary longevity Because Classé has developed highly rened circuits over many years, we have
vast experience in what works well over the long term. Using this knowledge
base, along with quantitative results derived from highly accelerated life testing
(H.A.L.T.), allows us to select only the most reliable parts. is attention to
detail and design allows us to manufacture products which stand the ultimate
test: time. Just as past Classé products have done for their owners, we are certain
that your new stereo preamp/processor will give you many years of continuous
enjoyment.
5
Unpacking and Placement
We have taken all precautions, and made every eort to make the Delta PRE
simple and straightforward to install and use. Still, we recommend that you
take a few minutes to review this manual. Even if you are having the preamp/
processor professionally installed, you will want to know how to eciently
operate it to its potential.
e Delta PRE menu system includes features that allow a great deal of netuning. Still, we have no way to evaluate outside variables such as the acoustical
characteristics of your listening space and the associated equipment of your
audio system. erefore, it is up to you to make the nal audio adjustments for
the optimum performance of your system.
unpacking your
Delta PRE
Important!
Delta PRE placement
considerations
Carefully unpack the Delta PRE Stereo Preamp/Processor. Do not forget to
remove all accessories from the carton.
Keep all packing materials. Transporting the Delta PRE without
using the packaging specifically designed for it may result in
damage that is not covered under the warranty.
Before installing your Delta PRE, be sure to read the following placement
suggestions.
• Do not place the Delta PRE directly on the top surface of a
conventional power amplier or any other heat source. Also keep the
unit out of direct sunlight.
• Place the Delta PRE so that the IR window on the front panel is
clearly visible and not blocked.
• Position
both visibility and use. e preamp/processor is the hub for all other
component connections and generally your primary interaction point.
In addition, by placing the unit close to the other system components,
you minimize the cable lengths and hence reduce the amount of noise
that is introduced into the system through the cabling.
• Leave
connecting cables. We suggest six inches (15 cm) of free space to allow
cables sucient room to bend without crimping or undue strain
• Allow at least three inches (7.5 cm) of clearance above and to each
side of the Delta PRE for ventilation. Do not obstruct the area
around the unit so that excess heat can dissipate through normal air
circulation.
the Delta PRE in a central and convenient location for
adequate clearance behind the Delta PRE for the AC cord and
.
Important!
6
Obey all placement considerations. Not obeying the
placement considerations may result in damage that is not
covered under the warranty.
warm-up/break-in period Your new Classé preamp/processor delivers outstanding performance
immediately. However, you can expect to hear subtle improvements as it reaches
normal operating temperatures and breaks-in.
In our experience, you can expect the greatest changes within the rst 72 hours.
After initial break-in, you’ll enjoy consistent performance levels for years to
come.
operating voltage
Important!
e operating voltage of your Delta PRE is specied on the rear panel label that
also includes its serial number. .
Attempting to operate your Delta PRE from an incorrect AC
voltage source may cause irreparable damage which may not
be covered by your warranty.
If you are not planning to use the preamp/processor for an extended period of
time, for example due to vacation or other travel, we suggest that you disconnect
it from AC power.
Make certain that the Delta PRE is in Standby prior to disconnecting it.
Physically disconnect any and all valuable electronics from AC power during
electrical storms. A lightning strike anywhere near your home can generate a
tremendous surge on the AC mains that can jump across a simple power switch.
A surge from a lightning strike, which may be many thousands of volts, can
cause serious damage to any piece of electronics, no matter how well designed
and protected.
7
1 6 2 3 4 5 7
Delta PRE
Front Panel
e front panel of the Delta PRE is shown above. e numbers in the drawing
refer to the descriptions that follow.
1 Standby/On Button and Status Indicator LED
Pressing the Standby button puts the Delta PRE into standby mode – a
low-power state which leaves the preamp/processor and outputs inactive
but still allows the unit to respond to system commands via any of the
supported control protocols (IR input, LAN, CAN-Bus or RS-232)*.
If the unit is already in Standby mode, pressing the Standby button fully
powers up the unit.
• LED On (Red) – the Delta PRE is in Standby mode.
• LED turns green, then white – the Delta PRE is in the process of
power-up initialization.
• LED On (white), indicates the unit is in the operate mode.
• LED Flashing (blue), indicates the unit is updating rmware.
• LED Flashing (red), indicates a problem during startup.
LED O – the Delta PRE is not getting AC power.
•
*See section on Advanced Settings: Wake-on-Network must be enabled
to allow controllers to wake the unit from Standby.
2 Touchscreen
e front panel touchscreen is used for day-to-day operation of the Delta
PRE. It is also used for setup and to display useful information as required.
Touch the screen anywhere on this Home page to access sources.
3 Menu On/Off Button
Press once to call up the main page of the menu system. Press the Menu
button again to revert to the Home page.
e menu system gives you control over operational details including:
system setup options, various display options and custom installation
capabilities so that the Delta PRE integrates smoothly into the most
complex systems. For more information, see the Menu System later in this
manual.
8
4 IR Window
e location of the IR (infrared) receiver for the remote control is behind
this window. In most cases, there must be a clear path between the IR
window and the remote control in order for the Delta PRE to acknowledge
the remote control commands.
If the IR window is not in view, for example if the unit is placed in a
cabinet or closet, then the rear panel IR input can be utilized for remote
control. For more details about this option, see the IR input description in
the Rear Panel section found later in this manual.
5 USB Host Connector
e front panel USB connector allows the Delta PRE to work with
Apple’s portable media devices such as iPad™, iPod® and iPhone® which
require this type of connection. e front panel USB connector accepts
digital audio from these devices (up to 96 kHz) and provides power for
recharging them. Limited control is also available for these devices using
the navigation keys on the Delta PRE remote control.
e front panel USB connector is also used to load rmware updates.
When updates are posted in the software downloads section of the Classé
web site, they may be loaded onto a USB stick and plugged into the front
panel of the Delta PRE. More information on this can be found in the
Firmware Updates section of this manual.
6 Headphone Jack
e 1/4
” (6.35mm) Headphone Jack accommodates stereo headphones.
Inserting a headphone plug mutes the main audio outputs.
7 Volume Control Knob
e large rotary knob on the right side of the front panel controls the
system volume level. It is also used for adjustments such as balance, input
oset and levels for the EQ and Tone Control.
The volume knob increases and decreases volume in precise 0.25 dB
increments throughout most of the volume range. At extremely low
volume, the step size is increased somewhat to facilitate moving between
extremely low and normal listening levels. e volume range is from
-93.00 dB to +14.00 dB.
e volume control expresses the degree of attenuation or amplication
being applied to the incoming signal. erefore, a setting of -23.00
indicates that the signal is being attenuated by 23.00 dB.
Most stepped attenuators oer too few steps, causing the listener to
choose a level that is a bit too soft or too loud, not just right. e volume
display on the touchscreen reads in 0.25 dB increments , thereby closely
approximating a continuous volume control, allowing the desired level to
be selected precisely as required for critical listening.
A volume setting of 0.00 indicates that no attenuation or amplication is
being applied. is is the setting used for the Pass-ru mode explained in
the Source Setup description in the Menu System section of this manual.
9
15 12 16 1 13 2
3
17
6
4
10 11
5
9 7 8
14
18
100-120~ T2AE 250V
220-240~ T1.25AH 250V
Conforms to ANSI/UL Std.60065
Cert. to CAN/CSA Std. C22.2 No.60065
SUB
CAUTION! TO REDUCE THE RISK OF ELECTRIC SHOCK, GROUNDING
OF THE CENTRE PIN OF THIS PLUG MUST BE MAINTAINED
ATTENTION! POUR RÉDUIRE LE RISQUE DE CHOC ÉLECTRIQUE
LA FICHE CENTRALE DE LA PRISE DOIT ÊTRE
BRANCHÉE POUR MAINTENIR LA MISE À LA TERRE
ANALOG AUDIO OUT
ETHERNETUSB
AUX 1
DIGITAL IN
AES/EBU
COAX1 COAX2 COAX3
MAIN RAUX 2
MAIN L
OPT1
OPT2 OPT3
CAN BUS
RS-232
L2R2L1R1
ANALOG AUDIO IN
OUT
2
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
1
IN
IR
TRIGGER
GND
PHONO
L4R4 LRL3R3
Rear Panel
e rear panel of the Delta PRE is shown above. e numbers in the drawing
refer to the descriptions in this section.
serial number You’ll nd your Delta PRE serial number on the rear panel, next to the AC Inlet.
Please record this number for future reference.
And since you have found the serial number, please use it to register your
purchase, if you haven’t done so yet. We may use the information to advise you
of any updates or other items of interest. Registration is simple, so please register
online at https://classeaudio.com.
1 Digital Audio Input - USB
e Delta PRE supports PCM digital audio sources up to 32-bit/384kHz
and DSD at native rates up to 256 (requires esycon/Classé driver for
Windows) and as DoP (DSD over PCM) at rates up to 128 via USB. e
rear panel USB Device connector mates with a USB Host such as a PC or
Mac.
Volume control changes made on your USB source will adjust volume in the
analog domain in the Delta PRE, which oers the highest performance. e
alternative, which is to adjust volume in the digital domain, causes loss of
resolution. Attentuation in the digital domain involves using fewer bits, so we
avoid it wherever possible
2 Digital Audio Input - AES/EBU
e Delta PRE provides an XLR type connector for digital audio
connections from source components such as CD players tted with this
professional-standard output. ese inputs accept PCM data streams up to
32-bits long and up to 192 kHz sampling frequency. We recommend using
cables that are optimized for digital audio signal transfer and that carry a
110Ω impedance rating. Your Classé dealer can help you with proper cable
selections.
3 Digital Audio Inputs - Coaxial
e Delta PRE supports three digital audio inputs, with SPDIF connectors
labeled COAX1 to COAX3. ese inputs accept PCM data streams up to
32-bits long and up to 192 kHz sampling frequency. We recommend using
cables that are optimized for digital audio signal transfer and that carry a
10
75Ω impedance rating. Your Classé dealer can help you with proper cable
selections.
4 Digital Audio Inputs - Optical
e Delta PRE supports three digital audio inputs, with optical TOSlink
connectors labeled OPT1 to OPT3. ese inputs accept PCM data
streams up to 32-bits long and up to 192 kHz sampling frequency*. We
recommend using cables that are optimized for digital audio signal transfer.
Your Classé dealer can help you with proper cable selections.
*NOTE: e bandwidth limits of TOSlink™ components are very
much strained at a 192 kHz sampling frequency. For that reason
you may want to limit signals using the TOSlink™ connections to a
maximum rate of 96 kHz.
5 Analog Audio Inputs - Single-Ended
e Delta PRE supports 2pr of RCA type connectors for single-ended linelevel analog sources. ey are labeled R3/L3 and R4/L4.
6 Analog Audio Inputs - Balanced
e Delta PRE supports 2pr of XLR type connectors for balanced analog
sources. ey are labeled R1/L1 and R2/L2.
NOTE: is input conforms to the AES (Audio Engineering
Society) “pin 2 = hot” convention. e pin assignments of these
XLR-type female output connectors are:
TM
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
Verify that the source components are compliant with this
convention (Classé components are compliant). If not compliant,
contact your Classé dealer for assistance.
e XLR R2/L2 connectors may be assigned as a phono input. See the
section on Phono Setup.
NOTE: e Balanced and Single-Ended 2-channel analog
audio inputs can be set for either digital bypass mode (all DSP
processing switched o) or converted to digital format to allow bass
management, tone control and/or equalization. If no processing is
applied, analog signals remain in the analog domain, even if not
specically set to digital bypass.
7 IR Input
Use the IR input when the front panel IR window does not have a clear
line-of-sight with the remote control, for instance, when the Delta PRE is
installed in a cabinet. Attach this input to an infrared repeater system to
route signals from the remote control to the Delta PRE via a mono minijack (3.5mm phono).
11
e list of available IR command codes can also be used in macros for
sophisticated remote control systems, facilitating the control of the
Delta PRE in the larger context of the complete system.
8 IR Output
Use the IR output to pass IR commands from an external IR transmitter
through the Delta PRE to another component, when necessary. e
output uses a mono mini-jack (3.5mm phono) with the same properties as
the diagram in the previous section.
9 Trigger Outputs
e Delta PRE supports two trigger outputs, with mono mini-jacks
(3.5mm phono) labeled OUT1 and OUT2. Each trigger outputs a 12V
DC signal at 100 mA and each can be controlled individually. Use these
outputs to control other system components such as ampliers and
window blinds. Refer to the DC Triggers description in the Menu System
section for more details.
10 RS-232 Port
e primary purpose of the RS-232 port is to support the use of external
commands to allow remote control of the Delta PRE by such systems as
AMX
these systems, contact your Classé dealer.
, Control 4, Creston
®
TM
and Savant®. For more information about
11 CAN-Bus Input and Output
CAN-Bus (Controller Area Network) allows several Classé components to
be connected together for simultaneous operation, such as switching from
On to Standby. Using the CAN-Bus Input and Output connectors, the
Classé components can be daisy chained together and controlled via the
CAN-Bus interface.
NOTE: e nal component in the daisy chain MUST have a
termination plug inserted into the CAN-Bus output.
For more information, refer to the CAN-Bus section found later in this
manual.
12 Analog Outputs
e Delta PRE supports ve analog audio outputs, with both balanced
(XLR) and single-ended (RCA) connections. Connect the Main R and
Main L outputs to the Right and Left amplier channels respectively.
e Aux 1 and 2 outputs are congurable and can be used for the
following purposes:
• Assigned to mirror the main L/R speakers for use in a power
biamplication arrangement.
• AUX 1 may be assigned as an additional subwoofer to be used in
conjunction with the Sub output congured as either two stereo
or two mono subs. See Conguration Setup/Auxiliary Channels
for more details.
12
NOTE: e Balanced (XLR) Output pin assignments adhere to
the AES (Audio Engineering Society) “Pin 2 = hot” standard. e
XLR male outputs carry the following pin assignments:
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Refer to the operating manuals of your balanced-input power
ampliers to verify that the pin assignments of their input
connectors adhere to this standard (Classé power ampliers are
compliant). If your ampliers are not compliant, it may not pose a
problem, but ask your Classé dealer for assistance.
13 Ethernet Connector
e Ethernet connection is used to enable streaming of audio using Apple’s
AirPlay or DLNA. is connection also supports IP control for using the
Classé App with Android and iOS devices and/or a home automation
system to control the Delta PRE via your home Network.
14 Phono Input
e Delta PRE supports 1pr of RCA type connectors labeled Phono
R/L dedicated to a phono input and supporting high output MM and
both high and low output MC type phono cartridges. For instructions
on setting gain and loading for MM/MC type phono cartridges, see the
section on Phono Setup.
Connector ground lug: chassis ground
Two RCA shorting pins are included in the Accessories pack. ese
should be inserted into the “Phono” inputs if they are not being used.
ey prevent any noise from being conducted through these inputs and
amplied by the high gain circuitry, potentially coupling with other audio
signals in the preamp.
15 Main Power On/Off Switch
is switch connects and disconnects the Delta PRE from AC.
16 AC Power Cord Input (AC IN)
e detachable three-conductor AC power cord and the socket into
which it connects conform to rigorous standards developed by the IEC
(International Electrotechnical Commission).
Danger! Your Delta PRE contains potentially dangerous voltages and
current capabilities. Do not attempt to open it! There are no
user-serviceable parts inside. All service must be referred to a
qualified authorized Classé dealer or distributor.
17 HDMI Inputs / Output (Optional)
An optional 4K-capable HDMI module is available for the Delta PRE.
It adds 4 HDMI inputs and 1 HDMI output to the unit. Please contact
your Classe Dealer for more information and to purchase this module.
18 Phono Ground Lug
Use this lug for grounding your turntable as necessary.
13
The Remote Control
Your Delta PRE Stereo Preamp/Processor includes a versatile IR remote control
for both the Preamp/Processor itself and several aspects of the rest of a Classébased system. e buttons are arranged in logical groups according to their
functions. e remote control of the Delta PRE is shown on the left. e
numbers in the drawing refer to the descriptions that follow.
1 Basic Functions
e two buttons at the top of the remote control groups the following
basic control functions:
• Light turns on the backlighting of the remote control for better
visibility under low-light conditions. After a few moments of
inactivity, the backlight switches o automatically.
• Standby toggles the Delta PRE between the Standby and Operate
states.
2 Volume Control & Mute Buttons
e Volume Up and Down arrow buttons increase or reduce the overall
volume level of the audio output. Pressing the Mute button reduces the
audio output volume level by a pre-determined amount. You can customize
selected features of both the Mute button and volume level. Refer to the
Volume Setup description in the Menu System section found later in the
manual for further instructions.
3 Config Select Buttons
e left and right arrow buttons step through the six congurations. If
there is a dierent conguration assigned as a default for a particular source
it will be overridden until the source is selected again, or you select that
particular default conguration.
Pressing the CONFIG SELECT button will open the congurations page,
making it easier to navigate to a specic conguration. Use the positions
of the highlighted buttons on the screen rather than trying to read their
names from across the room.
4 Source Select Buttons
To change inputs, simply use the Source Select arrow buttons to step
through the inputs.
Pressing the SOURCE SELECT button will open the Source Selection
page, making it easier to navigate to a specic source. Use the positions
of the highlighted buttons on the screen rather than trying to read their
names from across the room.
To keep your input selection list smaller and easier to navigate, the Source
Select buttons will toggle only through those sources which are enabled.
Refer to the Menu System section found later in the manual for further
instructions.
14
MENU
TONE
CONFIG
SELECT
SOURCE
SELECT
HOME
5 Navigation & Menu Buttons
e remote control contains the navigation buttons and the menu access
buttons. is array of buttons is used for navigating the menu system on
the Delta PRE as well as providing basic transport controls to USB and
AirPlay-connected sources. Each of the buttons performs the following
1
function(s):
• MENU accesses the main screen for the menu system, in the
same fashion as the front panel Menu button.
2
• HOME returns the touchscreen display to the Home page. e
HOME button essentially acts like a “back to start” button – no
matter how deeply you’ve navigated into the menu system, a
3
single button push returns you to the front page.
• Navigation Arrows are located in the familiar Up (p), Down
(q), Left (t), and Right (u) arrow positions which allow
4
you to select the dierent menu options within the menu
system. When on the Home page, these buttons instead serve as
5
BAL
transport controls for USB and AirPlay sources with the typical
play/pause, stop, scan/skip forward and scan/skip backward
commands.
6
• Pressing the ENTER button selects the underlined menu item in
any menu screen.
• TONE accesses the Tone Control screen. Pressing Tone while on
the Tone Control screen activates the tone control. Subsequent
presses toggle between enable and not enable. While on the
Tone Control screen, the volume up/down keys adjust the tone
control. See Tone Control Setup in the Menu System section for
more information.
• BAL is used to access the Left/Right balance. Use the Volume
arrows to adjust the L/R balance.
6 Function Keys (F1 to F8)
e last eight buttons on the remote control are the Function buttons,
or Fkeys, which provide additional exibility to the Delta PRE remote
control. ink of them as “favorite” buttons that provide direct access to
specic functions or commands not covered by the other buttons. Refer to
the Remote Fkeys description in the Menu System section found later in
the manual for more information.
Note: You may also remotely control the Delta PRE by connecting it to a
Network and using the Classé App, available free of charge in the Apple App
and Google Play stores. e Classé App allows enhanced functionality compared
with the IR remote, and control can be exercised without line-of-site contact
with the unit.
15
Initial Setup
Your Delta PRE Stereo Preamp/Processor is delivered with default factory
settings to facilitate initial setup. But we highly recommend that you work with
your Classé dealer for the nal setup of the preamp/processor. Your dealer’s
knowledge and experience with Classé products will ensure that your audio
system is optimized for your listening space.
However, if you can’t wait to get started, this section is designed to assist you in
setting up and becoming familiar with the Delta PRE hardware. Once the initial
setup is complete, be sure to read the rest of this manual to familiarize yourself
with the daily operation and customizable features of your Delta PRE.
Step 1 Connect the Delta PRE and all system components to AC power.
Important!
M
ake sure everything–especially your power amplifier(s)–is
turned off before connecting power!
Connecting all system components to AC power, before making any
interconnections between components, ensures that every component has a solid
connection to ground. is lessens the chances of a static discharge that may
damage delicate electronics or your loudspeakers.
Step 2 Choose the appropriate cables.
Before you start connecting components together, let’s take a minute to discuss
the cables you will be using. e audio outputs available on the rear panel
include both balanced XLR connectors and unbalanced, or single-ended, RCA
connectors.
Single-ended RCA audio connections are the most popular means of
transmitting audio in consumer electronics. As long as you use high quality, low
capacitance cables, single-ended connections provide very satisfactory results.
However, balanced audio connections between components provide the best
analog signal connection because they eectively double the signal strength.
More importantly, as compared to single-ended connections, they signicantly
improve resistance to common mode noise, therefore enhancing audio
transparency, detail, and dynamics. To fully realize these potential benets, high
quality interconnect cables are required.
16
Please consult your local Classé dealer for advice on which cables are best suited
for your system.
Step 3 Connect source components to the Delta PRE rear panel.
If necessary, refer to the Rear Panel section in this manual for a detailed
description of each connector found on the rear panel. Your local Classé dealer
can also provide useful suggestions for what source components you should add
to your system and guidance in setting them up.
Make sure you keep a detailed record of the rear panel
connectors that you used while connecting the source
components!
You’ll need to know what connector(s) each source is attached to when you enter
the setup menus. An Installation Worksheet is included at the end of this manual
to assist you.
NOTE: In the Delta PRE default settings, fourteen rear panel
inputs are associated with corresponding source selections within
the Source Setup menu. Since most users will have fewer sources
connected, the Source Selection page(s) can be simplied by
unchecking the Enable Source box for each unused input. Doing so
removes the corresponding Source button from the Source Selection
page. See the Menu System section for details.
Step 4 Connect the power amplifier(s) to the Delta PRE rear panel.
Important!
Verify that the power amplifier(s) is plugged in but powered
OFF before connecting to the Delta PRE!
We recommend using high quality cables with XLR connectors.
NOTE: ese pin assignments are consistent with the standards
adopted by the Audio Engineering Society. Refer to the operating
manuals of your balanced-input power ampliers to verify that the
pin assignments of their input connectors correspond to the Delta
PRE. If you are using Classé ampliers, this note does not apply.
If needed, the pin assignments of the XLR-type male output
connectors are:
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
Connect the Main L&R Outputs, either RCA or XLR, from the rear panel of
the Delta PRE to the corresponding inputs on your amplier(s).
• If you are using a subwoofer, connect the Delta PRE subwoofer
output to the input of the designated amplier or powered
subwoofer.
NOTE: Make sure connections from the subwoofer output go only to an
amplier connected to a subwoofer or a powered subwoofer, as low frequency
signals can damage a small speaker not designed for high output bass
reproduction.
17
When connecting a cable, make sure the cable has a good connection and is
rmly attached to the rear panel connectors on both the amplier and the
Delta PRE.
e Delta PRE also provides two Auxiliary analog audio outputs. See the
section on Conguration Setup for more details about the Auxiliary outputs. If
used, connect the AUX output(s) to its corresponding amplier(s) or subwoofer.
Step 5 Connect the loudspeakers to the amplifiers.
Important!
Verify that the power amplifier(s) is plugged in but powered
OFF before connecting to the Delta PRE.
Connect each loudspeaker to its designated amplier channel. Pay close
attention to the phase of the speaker connections – always connect an amplier’s
red (+) terminals to the red (+) terminals of the loudspeaker. Likewise, connect black
(–) terminals to black (–) terminals.
Step 6 Power up the system!
Now you are ready to power up your Delta PRE and your audio system.
• Turn the rear panel power switch of the Delta PRE to ON.
Standby LED will turn red.
• Press the standby button containing the LED.
cycle of the Delta PRE takes a few seconds.
• When the power-up cycle is complete, the Delta PRE enters Operate
mode and the touchscreen becomes active.
• Press the Standby button to toggle the Delta PRE into and out of
Standby.
e physical setup of the Delta PRE and system components is complete.
e initial power-up
e
18
Using the Delta PRE
e Delta PRE’s versatile touchscreen LCD supports your day-to-day operations
and provides access to a exible menu system for controls and setup functions
that aren’t accessed as often. is section of the owner’s manual outlines the use
of the touchscreen in routine operation of the system.
When you bring the Delta PRE out of Standby mode, the touchscreen displays
the Home page of the menu system, as shown below.
Home Page e Home page displays the volume in large font which is easily visible from
across a room. e selected source appears at the bottom-left of the screen. At
the bottom center of the screen the format of the incoming signal is displayed.
is displays the sampling frequency of digital sources as well as the le format
(ALAC, WAV, FLAC, etc.) of streaming Network sources or Bypass if so
selected for analog sources. If Pass-ru is selected for either digital or analog
sources, the volume display will read 0.00 and be greyed out (since the volume
control is not active in this mode).
ere are also indicators at the bottom-right of the screen.
• TONE indicates that the tone control feature is enabled
• EQ indicates that the Parametric EQ feature is enabled
• MONO indicates that the Delta PRE is running in mono mode
rather than stereo.
• e headphone icon indicates that there are headphones plugged in
and that the rear analog outputs are muted.
• e turntable icon indicates that the currently select source is set
for phono mode. Phono may have up to 63dB of gain compared to
non-phono sources.
is page can be quickly accessed at any time by pressing the Home button on
the remote control or tapping the home icon on the touchscreen display.
.
.
Source Selection Touching any part of the screen when on the Home page brings up the Source
Selection page. e number of source buttons appearing here corresponds to the
number of inputs that have been set up and are “enabled.” A maximum of nine
sources may appear on one page. If more are enabled, they will be available on
the next page by touching the
See the section on source setup in the Menu System.
button in the upper right corner of the page.
19
e Delta PRE has up to 18 selectable source buttons which are all
interchangeable: Any source may be assigned to any button location and
associated with any connector.
Touch any source button on the touchscreen to select it as the current source.
e selected source button is shaded. If the source you want to choose is not on
this screen (and you have more than nine source buttons enabled), press the
button for the next page of sources. Or, press the
previous page.
button to return to the
e Delta PRE comes from the factory with fteen source buttons labeled and
enabled. To change the default settings and labels or to disable unused buttons,
see the Menu System.
The Menu System
e comprehensive menu system provides setup and conguration controls for
the Delta PRE. ese installation-specic features let you customize how the
Delta PRE works within the context of your particular system. Changes are
made on-the-y, which allows you to quickly set up and modify settings without
constantly being asked if you’re sure you want to make the change and pressing
enter to save. e Delta PRE stores settings in non-volatile memory whenever
the unit is put into standby, so it’s a good practice to put the unit into standby
after making changes. In normal daily operation this happens anyway, but if you
want to be sure a loss of power doesn’t erase your changes, putting the unit into
standby will give you extra assurance.
Pressing the Menu button on the front panel or remote control opens the main
Menu page, which is divided into six sections as shown below.
20
At the top right of the menu pages you may nd a
arrow icon when additional menu options are available, and/or a Home button
for returning to the Home page. When on the main Menu page, pressing the
Menu button returns to the Home page. If you are on a page within the Menu
System, pressing the Menu button returns you to the main Menu page. When
you navigate beyond the main Menu page, a return or back button using the
icon appears on the upper left corner of the page. is returns you to the
previous page.
button which uses the
System Setup Touching the System Setup button on the main Menu page opens the System
Setup page, which contains twelve setup options, the rst nine of which are
shown below, with DC Triggers, Headphone X-feed, and Advanced Settings
located on the next page.
From the System Setup menu, you can:
• tailor your inputs to your particular source components
• congure the system to take best advantage of your loudspeakers
• tailor the display to your preferences
• set volume control parameters
• enable and setup the Parametric EQ
• setup Tone Control parameters
• view the unit’s Network IP address/status and settings
• choose Remote F key functions
• assign DC triggers
• enable Headphone X-feed
• access Advanced Settings including Restore Defaults, Archive Settings,
Restore Settings, Wake on Network and Auto Standby
21
Source Setup Each of the 18 source buttons supported by your Delta PRE can be customized
in several ways to enhance system performance and/or to simplify operation. e
source select page is dynamic in that it shows up to nine sources on a single page.
If six or fewer are enabled, then the page shows six somewhat larger buttons and
if three or fewer are enabled, it shows only three large buttons. Press the button
for the source or button location you want to set up.
e rst setup page for that source includes buttons for assigning the input
connector(s) and naming the source, choosing a default speaker conguration,
setting an input oset, selecting the Pass-ru feature and choosing the Digital
Bypass path.
e second page of Source Setup buttons shows three HDMI inputs. ese are
active/available when the optional (4 input, 1 output) HDMI switching module
is installed. As with the other source buttons, these may be renamed and used
with any of the input connectors.
22
Enable Source is check box activates/deactivates the source button. If the Enable Source
box is checked, then the source is enabled. If the Enable Source box is NOT
checked, then the source is considered not enabled and is so identied on the
Source Selection page.
Disabling unused sources is a good way to simplify source selection. e
Source Selection page is dynamic, adjusting the number and size of buttons to
correspond to the number that are actually being used or enabled. e buttons
arrange themselves into groups of either three, six or nine buttons on the Source
Selection page.
Input Connector Choose the input connector(s) to be associated with this source button. Any
source button may be associated with any input connector(s). Also, multiple
source buttons may be assigned to the same connector(s).
Source Name e Source Name button provides a way to customize the names of the sources
as displayed on the Source Selection screen(s). For example, a music server
plugged into the Coax 1 input, you might want to rename the input Music
Server to make it easier to remember.
To change source names, use the keyboard on the touchscreen. A maximum
of 16 characters can be entered. Note that the size of the source buttons varies
depending whether you have 1-3, 4-6 or 7-9+ sources enabled, so the length of
name that may be fully displayed on the button will likewise vary. After entering
the source name, press Enter on the keyboard to save the change.
Important! Note: While the Phono R/L RCA connectors are dedicated phono inputs, the
R2/L2 XLR connectors may serve either line level (the default setting) or phono
sources. Because a line level source might be connected to these XLR inputs
after they’ve been set to phono, there is the possibility that an extremely loud
signal could pass to your amp/speakers. Be sure to label the source button so it
is clear that it’s a Phono input and consider adding a label above the XLR R2/
L2 connectors on the back panel as a reminder that they have been setup as a
phono input.
Configuration e Conguration button allows you to assign one of the up to six
conguration options (see Conguration Setup) as the default for the source
button being set up. Whenever this source is selected, that conguration will be
employed. You might set up one source such as a disc player to have a default
conguration with a subwoofer crossed over at 80 Hz for movies. You may then
set up another source button for the same disc player with a dierent default
conguration, say one with a subwoofer crossed over at 40 Hz, for music.
Congurations are speaker setups, and are discussed in more detail later in this
section.
NOTE: e default Conguration assignment can be temporarily
overridden from the remote CONFIG SELECT buttons from the
Congurations page on the Classé app, or from the Congurations button on
the main Menu page. See the section, Using the Delta PRE, for more details.
Input Offset Input Oset is used to ensure that all sources playback at comparable level.
ere can be signicant dierences in output levels, especially among analog
sources, which can lead to unexpected changes in volume when switching
among them. e Delta PRE provides an input oset adjustment range from
-10.00 to +10.00 dB.
Pass-Thru Selecting Pass-ru locks the volume at 0.00 dB for this source and passes the
signal through the preamp without changing its level. is feature is useful to
avoid having two volume controls active such as when the preamp sits between
an SSP or a whole house digital music server system and the L&R channel
ampliers. Note that the Pass-ru mode is available for digital as well as analog
sources. It is not available for USB sources as they already allow volume to be
controlled from the source, thereby eliminating the problem of having two volume
controls in the system, which Pass-ru is designed to avoid.
Digital Bypass Digital Bypass is available for sources associated with analog input connectors.
Choosing Digital Bypass will switch o all digital signal processing circuitry and
leave the signal entirely in the analog domain. When Digital Bypass has been
selected, DSP features are not available. ese features include Tone Control,
PEQ, Mono and Bass Management (subwoofer output). If a conguration with
subwoofer(s) enabled is called, the Digital Bypass setting will override the bass
management settings in the conguration, leaving the L&R signals analog and
full-range with no subwoofer output. If Digital Bypass is NOT selected, analog
signals remain in the analog domain unless a feature that requires DSP is called.
23
Phono Setup e Delta PRE supports up to two phono inputs, one through the RCA R/L
connectors and a second through the XLR R2/L2 connectors. Each may have its
own gain and loading, adjusted from the touchscreen.
Go to System Setup, Phono Setup and choose the phono input you want to
congure, rst. Select the desired gain. Custom loading options appear in the
listbox on the right-hand side of the page. You can evaluate a chosen loading
option, then easily select another for quick, on-the-y comparisons.
When using the XLR Phono input in conjunction with a RCA-equipped phono
source, we recommend following the wiring diagram below when selecting an
XLR-to-RCA phono cable. Alternatively, a common non-inverting XLR-toRCA cable may be used, where pins 1 and 3 are connected together internally.
Remote Fkeys e remote control supplied with the Delta PRE has eight function keys
(Fkeys), each of which can give you instant access to specic system functions.
For example, if you want direct access to particular sources or congurations,
you may want to consider programming some of the Fkeys to directly access
them. By assigning them as Fkey functions, you do not need to use the arrow
keys to scroll through the active sources or congurations looking for them.
24
e remote control F1 to F8 buttons correspond to the Function Keys displayed
on the touchscreen. Select the Function Key that you would like to assign, then
scroll through the list and choose the specic function you want that Fkey to
perform.
Important note on Fkey use
Volume Setup Touching the Volume Setup button in the System Setup menu opens the
All Classé Delta and CT series remote controls provide at least four Fkeys.
Commands F1-F4 on every Classé remote send the same IR signals as F1-F4
on every other Classé remote, so you do not need to worry about which remote
you’ve picked up. us F1 on the Delta PRE’s remote control sends the same
infrared signal as F1 on the CD player’s remote control and so on.
While this is intended to minimize confusion amongst dierent remotes (since
this aspect of them will all perform identically), you should take care when
assigning dierent functions on dierent components to the same Fkey. Doing
so can result in two components doing two dierent things at once, in response
to a single press of a button on the remote control. is can sometimes be
useful. As an example, F1 could set the Delta PRE to the CD Player input, and
also set the CD player to Play, both from the press of a single Fkey.
Volume Setup page, as shown below. e volume control is used to make all
volume setup adjustments.
Volume Setup allows you to:
• set a maximum volume level;
• choose an initial volume level for the system whenever the Delta PRE is
brought out of Standby;
• customize the behavior of the mute control.
25
Max Volume e Max Volume page allows you to establish a maximum volume setting for
your system. is scale runs from -93.00 to +14.00, with +14.00 dB indicating
that you do not want any articial limit placed on the maximum gain your
Delta PRE can provide. is setting is interactive. It is easiest to play the system
at increasing levels until you reach the volume which you want to use as the
maximum for the system. Using the volume control, enter that value on the Max
Volume page.
Startup Volume Touching the Startup Volume button allows you to set up a preferred volume
level for when the Delta PRE wakes out of standby.
• e factory default is for a startup volume set to -30.00.
Mute Setup e Mute Setup page allows you to choose how the Mute button functions. e
options for mute control are:
• specic - allows you to select the exact value to which the volume is
attenuated. If the current volume is already below that level when muting
is engaged, the volume remains unchanged. e factory default is - - -,
which is fully muted.
• dampening - reduces the current listening level by a specied amount (e.g.
-25.00 dB).
26
Configuration Setup e Conguration Setup page allows you to dene up to six dierent speaker
congurations. Touch the button for the specic conguration you want to set
up to open its conguration setup menu. e page contains buttons for naming
the conguration and enabling balanced (XLR) and/or single-ended (RCA)
outputs for Main, Aux and Subwoofer channels. Choosing a subwoofer output
causes a Bass Management button to appear. e same menu is used to set up
each conguration.
Configuration Name As with naming sources, press the Conguration Name button to access the
keyboard used for customizing the conguration name. Remember to press Enter
after making your changes to save the new name.
Configure Outputs Choose the output connectors you want enabled with this conguration. If a
subwoofer (or two) is used, a Bass Management button appears, allowing you to
set crossover frequency and slope, or enable stereo or two mono subwoofers.
If you also want to High-Pass Filter the L&R outputs, check the box for L/R
HP Filter. e crossover will pass the higher frequencies and correctly direct
the low frequencies to the subwoofer(s) based on your frequency and slope
settings. If this box is unchecked, L&R channel signals pass full range and the
lower frequencies are duplicated by the subwoofer(s). is may result in too
much bass, especially at certain frequencies, so equalization may be required to
compensate.
27
Auxiliary Channels e Delta PRE has two auxiliary channels that can be utilized for bi-amping the
L&R speakers. Alternatively, Aux 1 may be used in conjunction with the Sub
output to provide a second mono subwoofer or stereo subwoofer conguration.
When congured for Stereo Subs, the Sub output channel serves as the Right
Channel Sub and the Aux 1 output channel serves as the Left Channel Sub.
If either the single-ended or balanced Aux channel outputs are enabled and no
more than one subwoofer is being used, then the aux channels are considered to
be active in bi-amp mode. Technically, this is called power-bi-amping. Separate
amplier channels are used for the high and low frequency drivers of your
loudspeaker, but the passive crossovers in the speaker do the work of ltering low
and high frequency signals. In this mode, the two auxiliary channels produce the
same output as the Main Left and Right channels.
NOTE: When bi-amping with two dierent ampliers on each
speaker, the ampliers must have the same gain in order to ensure
proper level matching between the upper and lower frequencies. All
Classé Delta, CT and Sigma series ampliers have the same gain
and may be used in any combination for bi-amping.
Display Setup e Display Setup menu page, shown below, allows you to congure the
brightness and display timeout used for the touchscreen display.
28
Brightness e Brightness setting of the Delta PRE touchscreen has three possible values:
low, medium, and high. Select the setting you prefer. A high brightness setting
usually works best in brightly-lit rooms; you may nd that a lower setting is less
visually intrusive under more subdued lighting conditions.
Timeout If you prefer listening to music in a dimly-lit or darkened room, you may
nd even the low brightness setting of the display somewhat distracting. You
can essentially turn o the touchscreen by reducing the timeout value of the
backlighting so as to turn it o entirely after a period of inactivity that you
may select. In this context, activity refers to any use of the user interface. is
includes hard buttons, the touchscreen, the app and the remote control.
For example, if you reduce the timeout to its minimum setting, the backlighting
illuminates the display as soon as you interact with any of the Delta PRE
controls, and remains lit for only three seconds – just long enough for you to
check a setting. If you continue to use any of the controls (at least once every
three seconds), the display remains lit. After three seconds of inactivity on your
part, the backlight extinguishes itself, essentially turning o the touchscreen.
If you prefer the display of the Delta PRE to remain on whenever not in Standby
mode, select the Never timeout option. e lamp in the touchscreen display is
designed for harsh automotive environments and will give you many years of
reliable operation.
NOTE: setting the brightness to a lower setting does not increase
the life of the lamp.
Network Setup e Network Setup page displays the IP address of the Delta PRE and the
Network status.
Pressing the Restore Network Defaults button on this page re-enables DHCP
mode. In DHCP mode the Delta PRE obtains an IP address from a device on
the Network (usually the Wireless AP).
e Delta PRE includes a built-in web interface that can be used to congure
the system name, Network settings or update the Delta PRE software. To access
the interface, type the IP address displayed on the Network Setup page in the
URL line of your browser (e.g. 192.168.1.0) and hit return. Alternately if you
are using Safari on the Mac, you can “Show All Bookmarks” (See: Bookmarks
menu) and click on Bonjour and double click on your Delta PRE device listed
in the Webpage’s folder.
On the web page: Status Information will show the System Name and the
Firmware Version number.
Conguration will allow you to personalize the system name and congure the
unit’s IP address manually. It is strongly recommended to use DHCP rather than
attempt to assign a static IP address, but if one is required, an IT professional
should be involved in the installation.
EQ Setup e Delta PRE’s Parametric EQ capability allows you to build very precise
digital audio lters to help compensate for xed sonic irregularities dened
by the location and characteristics of your speakers, your room and your
listening position in the room. ese lters should be constructed based
upon audio measurements made by a well-qualied acoustical engineer. ese
powerful lters are made available in a completely manual fashion to help your
professional installer give you the best listening experience possible.
As many as ve lters can be built for each speaker channel. An Aux channel
not being used as a subwoofer assumes the same lters as dened for its Left or
Right channel partner.
29
In order to dene the PEQ lters, select EQ Setup from the System Setup
menu, Check the box to enable the EQ. Choose which channel you wish to
adjust, select a band and enable its lter, then tune it with the appropriate center
frequency, gain, and Q.
You do not need to have all or even any lters enabled for every channel. e
installer need only make the adjustments to the channels necessary to correct
for the room’s interaction. We encourage you to consult with your authorized Classé
dealer to properly calibrate the Parametric EQ function.
NOTE: a discrete IR command or Fkey may be used to toggle the
EQ on and o to easily compare before and after from the listening
position. When the EQ is enabled, EQ appears on the Home page.
Tone Control Setup e Tone Control may be congured as conventional bass and treble controls
or used as what is sometimes called a tilt control. In either conguration, the
maximum boost and cut is 6.0 dB.
e default setting congures the Tone Control as a Tilt control with low- and
high-frequency 3 dB points at 200 Hz and 2,000 Hz respectively. ese values
are user adjustable, allowing customization of the frequency ranges manipulated
by the tilt control. e Tilt control will adjust frequencies above and below
these inection points by tilting the tonal balance in one direction or the
other, stepping the higher frequency range up or down in 0.5 dB steps while
simultaneously stepping the lower frequency range in the opposite direction,
down or up, leaving the frequencies in between unchanged.
If conventional bass and treble controls are desired, select that option and
choose the frequencies below which the bass control works and above which
the treble control works. e bass and treble controls may be accessed from the
touchscreen (Menu> Tone Control) or by pressing Tone on the remote. Use
the navigation buttons on the remote or the touchscreen buttons to increase
or decrease the level of bass and treble independently. e Tone Control is
activated and deactivated by successive pressing of the TONE button on the
remote, choosing the tone control icon on the Classé app, or selecting and
deselecting the Enable box on the touchscreen. e app makes using the Tone
Control particularly easy, allowing quick selection of Tilt, Bass/Treble and None
while using its virtual volume control knob to adjust levels.
30
DC Triggers e Delta PRE has two available trigger controls. Each may be programmed
using normal 12 V or “inverse logic” (0 V) settings. e ability to change the
way the trigger operates can solve installation-specic problems that otherwise
require external devices that add to both the cost and complexity of your system.
e triggers can be associated with the Standby mode, a specic source or a
conguration. To use the Inverse Logic option, simply check the Inverse Logic
box on the Trigger Setup page.
For more information on the potential use of DC triggers, we recommend you
speak with your authorized Classé dealer.
Headphones X-Feed e Headphones Cross-Feed feature is used to create a more spacious and lifelike
soundeld when listening through headphones. e center-back-of-the-head
image produced by stereo signals played back through headphones is unnatural
compared to our normal method of hearing, where both ears are listening to the
music source and determining spacial cues based on arrival times and the shape
of your head. e X-Feed feature mixes some phase-adjusted left channel into
the right channel and vice versa to create a more natural soundeld and reduce
listener fatigue.
Advanced Settings Advanced Settings allow you to:
• Restore Defaults, which discards all settings and returns the Delta PRE to
its Factory Defaults.
• Archive Settings, which saves the current settings, allowing you to make
future changes but return to these settings if desired.
• Restore Settings, which loads the settings previously saved by the Archive
Settings command.
• Enable Wake on Network, which allows the Delta PRE to detect power
ON commands from external network controls like CAN Bus, RS-232
and IP-control including the Classé app. e default mode is for the Wake
on Network feature to be enabled.* If you want this feature to be disabled,
toggle the checkbox o.
• Enable Auto Standby, which puts the Delta PRE into standby after a
period of inactivity lasting ~20 minutes. e default mode is for the Auto
Standby feature to be disabled.* If you want this feature to be enabled,
toggle the checkbox on.
Note: e methods used to detect small signals in the Delta PRE are designed
to avoid any possibility of degrading sound quality and as such, they do an
imperfect job of recognizing when small or low volume signals are present.
For this reason, with Auto Standby enabled, the unit may go into standby
unexpectedly while signals are present.
* Note that the UK/EU version units such as those sold in the
European Union are shipped with Wake on Network mode disabled
and Auto Standby mode enabled.
31
Tone Control Setting up the Tone Control involves choosing high and low frequency
inection points, and relative cut or boost for them. e factory default settings
create what is called a tilt control, which tilts the tonal balance either toward
more high and less low frequency for a leaner, crisper sound, or the opposite
direction toward a warmer, fuller sound.
NOTE: To change these parameters, press MENU, then System
Setup, Tone Control Setup.
If conventional bass and treble controls are preferred they may be congured
using the Tone Control Setup page as described in the System Setup section.
Press TONE on the remote, the tone control icon on the Classé app, or
MENU then Tone Control on the touchscreen to access the tone control.
e Tone Control is activated by selecting the Enable box on the touchscreen.
Alternatively, pressing Tone on the remote control switches to the Tone Control
screen and each subsequent press toggles the control on and o. When the Tone
Control is enabled, Tone appears on the Home page. e Volume up/down
buttons on the remote and the volume knob on the unit and Classé app are used
to increase or decrease the eect of the Tone Control when in Tilt mode. When
used as conventional bass and treble controls, the Boost and Cut buttons on
the touchscreen are used for increasing or decreasing the corresponding Tone
Control levels. ese controls may also be accessed by pressing Tone on the
remote control and using the volume up/down keys. e adjustment range is +/6 dB in 0.5 dB increments.
Balance To adjust the L/R Balance, when on the Balance page, use the volume knob or
the volume up/down keys of the remote control. Balance is adjusted in 0.5 dB
increments by alternately boosting and cutting 0.5 dB from each channel. In this
way, the overall level stays roughly the same as the balance shifts. e Balance
control works by making adjustments with the master volume control, so no
additional circuitry enters the signal path when balance adjustments are made.
e Balance control oers a range of +/- 10.0 dB and moving the control to
either extreme turns o the opposite channel (used mostly for troubleshooting).
NOTE: Your L & R speakers may not produce the exact same
output for a given input, or their location in the room or relative
to your listening position may contribute to a perceived imbalance
of up to a few dB. To compensate for this, play a simple vocal
recording and put the Delta PRE in Mono (press Menu, then
Mono). Open the Balance control page and using the remote,
adjust the balance until the sound image is perfectly centered. If
you close your eyes and do this a few times, you will nd that one
number, (e.g. Right 1.5 dB) may appear consistently. If so, you
know that is the adjustment your system requires. Leave the setting
there, return to normal stereo operation and then forget all about
the balance control.
32
Configurations You may create up to six dierent output congurations to accommodate
preferences like with or without subwoofer(s), or with subwoofer(s) having
dierent crossover settings. While these congurations may be associated with
specic sources, they may also be called from the Main Menu page or the remote
control. Pressing the Congurations button in the Main Menu or choosing
CONFIG SELECT on the remote opens the Congurations page. Choose the
conguration you wish to employ.
To customize congurations, see the Conguration Setup description in the
System Setup section.
Mono Pressing the Mono button combines L & R channels, resulting in monaural
output on all channels (including Auxiliary and subwoofer channels). When in
Mono, the Mono button is shaded. Press again to deselect and return to normal
stereo operation. When in Mono, the word Mono appears on the Home page.
Status e Status screen provides several items of information on the currently selected
source and conguration as well as access to information on the rmware used
in and the internal settings and sensors of the Delta PRE. While on this page,
pressing the more button will access the CAN-Bus features for connected Classé
components.
Firmware Updates Please visit http://classeaudio.com to download the latest rmware and related
documentation for your unit. ere are two approaches to updating the
rmware for the Delta PRE.
One way is through the front panel USB connector, which can be used to load
rmware updates. e rmware would be loaded onto a USB stick. With
the rear panel power switched o, plug the USB stick into the front panel of
the Delta PRE. When the power is switched back on from the rear panel, the
update will proceed automatically. e LED indicator will commence with
a series of ashing red, o and blue. After several seconds, it will ash blue
continously for up to several minutes, depending on the size of the update.
e touchscreen may ash white as well. At the end of the update you will see
the touchscreen turn white with a small target awaiting your input for screen
calibration. Using your nger or something smaller like a pencil eraser, touch
the screen in each of the successively identied areas to calibrate it. Once
complete, the light on the USB stick will extinguish and the touchscreen will
show the Home page. Remove the USB stick and continue using the Delta PRE.
Remember that any subsequent setup changes are stored when the Delta PRE is
put into standby.
As an alternative to the standard USB stick method of updating the unit’s
rmware, updates may be initiated from the Delta PRE web interface page.
Using the Firmware tab on the Delta PRE’s web page, conrm that the rmware
version currently installed is not the latest and click on the System restart
button. Follow the prompts to complete the update.
33
CAN-Bus
CAN-Bus Classé’s Controller Area Network, or CAN-Bus, allows communication and
control between similarly featured Classé
is connected with other CAN-Bus-equipped Class
elements in the system are in constant communication, creating a “global”
network that delivers system wide status information and shared operational
features, all through the preamp/processor’s touchscreen display.
Note that some components will require a software update to be recognized on
the CAN-Bus. Check the Classé website periodically for updates.
features CAN-Bus will allow a
• Display status information for every connected unit, including
ampliers which do not have a touchscreen display.
• Create a “PlayLink” that allows an SSP or Preamp to automatically switch
to the correct input when a Delta series source component starts playback.
• Adjust the global system brightness.
• Congure the entire system to go in and out of standby at the touch of
a button and also bring individual components in and out of standby.
• Mute any connected unit.
Class
é touchscreen to:
components. When the Delta PRE
é
components, the dierent
hardware setup 1 Classé CAN-Bus Equipped Products
Two or more Classé CAN-Bus equipped products are required, at least one of
which must have a touchscreen display.
2 Category 5 Network Cables
ese are ordinary network cables, commonly used for broadband Internet
connections. ey should be typical “straight through” cables not the “crossed
over” type, and the total required will be one less than the total number of
CAN-Bus equipped components in your system. Daisy chain the components
from one to the next using these network cables.
3 CAN-Bus Terminator
A single CAN-Bus Terminator may be required. It is inserted into the
CAN-Bus OUT connector of the last component in the CAN-Bus daisy
chain. One is
for a small fee from your nearest Classé Customer Support Centre.
included in the box with your amplier. T
https://classeaudio.com/contact/
using CAN-Bus CAN-Bus is controlled via the touchscreen of any
so equipped. ere is no master component, so
two or more units have a touchscreen can be controlled through any of the
touchscreens. However, it is probably easiest to start using CAN-Bus through
just one.
Classé
hey are also available
Classé
component that is
series systems where
34
CAN-Bus is accessed by pressing the menu button on the face of the unit or
remote, then the status button, followed by the more button (right arrow) in
the upper right corner of the screen. e touchscreen will then display the CAN-
Bus devices screen, which lists connected components by model & serial
number.
Selecting a unit on the CAN-Bus devices screen identies it as the target unit.
e front panel LED(s) or meter light of the target unit will start ashing (unless
you choose the unit that you are using to access CAN-Bus).
Once you have chosen the target unit, the touch screen will list the CAN-Bus
features available to it. Some CAN-Bus features are shared by all models, some
are specic to individual models.
Make sure to exit the CAN-Bus pages before putting your unit(s) into
Standby, otherwise the previously selected unit will continue to ash its
front panel LED when powering up the next time.
CAN-Bus amp features e following CAN-Bus features are available on the Delta MONO / STEREO.
e model, name and rmware version number will be displayed on the
CAN-Bus page of the targeted unit.
Operate e Operate button allows you to bring the target unit in and out of standby.
is button will be disabled for the unit whose touchscreen you are using to
access CAN-Bus.
Mute Engaging Mute will mute the output of the target unit.
Global Standby By setting all your components to Global Standby you can bring your entire
system in and out of standby by pressing the standby button of any unit or
remote. All CAN-Bus software updates automatically set the updated unit
to Global Standby. If you want a particular unit to be excluded from Global
Standby, deselect Global Standby for that unit.
Global Dim By setting all your components to Global Dim (referred to as Global Brightness
in earlier models), you can adjust the touchscreen and LED brightness for your
entire system by changing the brightness of a single touchscreen. All CAN-Bus
software updates automatically set the updated unit to Global Dim. If you want
35
a particular unit to be excluded from Global Dim, deselect Global Dim for that
unit.
Other status e Other Status screen displays information about the target unit’s internal
temperature sensors. Readings for Heatsink 1 & 2 are displayed in degrees
Celsius.
Note: is feature is only available when the target amplier is in operate mode.
name You can set the name which will appear next to the unit model name and
facilitate the identication of units in large systems.
Event Log Reserved for ampliers, this feature records protection circuit events and can
only be accessed when the target amplier is in standby.
Note: For the amp to be put into standby while allowing the unit with the
touchscreen to remain in operate mode, Global Standby for the amp must be deselected (not highlighted) so the amp can be manually put into standby.
e protection circuit shuts down the amplier or channel if it overheats or if
its output could damage your speakers. e Event Log details the circumstances
surrounding the amp going into protection and should be referred to in
situations that require the intervention of your dealer or Classé customer
support.
e Delta MONO Event Log can report the following events interpreted as
follows:
• DC Output — DC from the source has exceeded the amplier’s ability to
correct for it. e amplier will shut down to protect the loudspeaker.
• Over Current — e peak current has exceeded the safe operating limit,
i.e. a short circuit.
• CBE — Comm Board Error. ere has been an internal communication
error.
• Over Temp — e internal temperature has exceeded the safe operating
limit.
• Fan Failure — e fan has been disconnected or is unable to spin.
Protection events are rare and generally occur due to issues that are external
to the amp. ey should be interpreted positively. e amp is doing what it’s
designed to do.
36
Network Sources Network sources are those which stream audio to the Delta PRE using its rear
panel Ethernet connection. e Delta PRE is equipped with a hard-wired
Ethernet connection because it provides a more reliable and higher speed
connection than is typically available over WiFi. If it is not possible or practical
to run a direct Ethernet connection from your router to the Delta PRE, various
solutions are available. A powerline Ethernet adaptor, such as those oered by
Netgear and others may be used or a wireless bridge such as Apple’s Airport
Express provides the local Ethernet cable (called LAN or Local Area Network)
connection required by the Delta PRE and connects to the Network router via
WiFi.
Apple AirPlay e Delta PRE is AirPlay certied; it can render audio content from Apple
iPhone, iPad or iPod touch devices or from iTunes on a Mac or PC.
To play content on the Delta PRE:
1. Connect your device to the same Network as the Delta PRE.
2. Open iTunes or the iPod App on your iPhone, iPad or iPod touch.
3. Locate and tap the AirPlay icon
menu (if attempting to AirPlay video content from Safari or Videos, begin
playback rst).
4. Press play.
When you play content over AirPlay the source will automaticaly change to the
Network source; in fact, the system will go ON automatically if it is in standby.
If your Delta PRE has multiple sources that select the Network input, the system
will select the most recently used (Network input) source.
e Home page shows stream status including the clock status and le format.
e Delta PRE supports the Apple AirPlay protocol for streaming audio
through a Network using wired (Ethernet) or wireless (WiFi) connections,
or a combination of the two. AirPlay lets you stream audio from your WiFi
Network-connected iPad, iPhone or iPod touch, or using iTunes, stream from a
(WiFi or Ethernet) Network-connected Mac or PC. Working within the Apple
ecosystem, AirPlay allows a wide range of le formats and data rates up to full
CD quality. A list of the AirPlay-supported formats and rates appears in the
specications section of this manual.
and select the Delta PRE from the
To use AirPlay, make sure a source button to use the Network connection has
been enabled.
Note: When your Ethernet connection is active, the green and amber lights
on the Ethernet connector will be illuminated and the Network Setup page
will show the status: “Connected.” If no connection is present, the front panel
display will show the words “Not Connected” when the Network source is
selected and also appear highlighted in red when viewing the Network Setup
page.
e Delta PRE display will show the status of the audio stream, so when using
AirPlay, it will show the sampling frequency of the signal as well as its format
(ALAC is the format AirPlay streams use). You may adjust the volume in iTunes
or if using Apple’s free Remote App, change volume and choose and manage
music les from your iOS device (iPad, iPhone, iPod touch). Volume changes
happen within the Delta PRE, which uses a high-quality analog volume control
to avoid the loss of resolution associated with digital domain attenuation. If you
press pause or stop, the display will indicate AirPlay - Stopped.
37
Using an iOS device for AirPlay works the same way. Choose the Music App
icon, tap the AirPlay icon, select the Delta PRE from the list of AirPlay speakers,
choose your music and play. Volume is likewise adjusted in the Delta PRE by
using the volume control on the device.
DLNA If you have chosen a Media Player other than iTunes and/or wish to stream
higher bit-rate les (up to 384 kHz PCM or DSD 256), the Network
connection will use the DLNA protocol. As with AirPlay, simply setup a
source button to use the Network connection. You can stream audio over this
connection whether DLNA or AirPlay, so you only need to enable a single
Network connection to have access to streaming audio from multiple sources.
DLNA is structured around three basic elements: a Media Player, a Renderer and
a File Server. e Media Player is your control interface. It is a program or App
that could reside on a smartphone, tablet or computer and its job is to allow you
to select your music les and control their playback. Examples of popular Media
Players include JRiver, Twonky and Media Monkey. A File Server is where your
audio data les are stored. Your Mac or PC could be the le server or it could
be an outboard storage device such as a NAS (Network Attached Storage) drive.
When called to be played, the data transit the Network from the le server,
through the Ethernet cable into the Delta PRE, which is a Renderer. It decodes
the le, performs any DSP functions you require and converts the audio from
digital data to an analog waveform. It then sets the playback volume and outputs
the signal to your amplier(s).
38
e setup of a system for using DLNA can become more complex than an
iTunes/AirPlay system and because of the nearly endless combinations of
hardware and software that may be involved, it is beyond the scope of this
manual. You will need to supply and congure the software for your chosen
DLNA Media Player and DLNA server(s). If you need assistance, your Classé
dealer should be able to help.
Troubleshooting
Always refer any service problems to your Classé dealer. However, if you run into
a problem, we recommend referring to this section rst as sometimes an error
is not a malfunctioning product, but simply an oversight in the proper setup
or use of the component. is section provides suggested solutions to potential
problems.
If none of these solutions work, please consult your Classé dealer for assistance.
ere are no user-serviceable parts inside the Delta PRE.
Important!
Verify that the power amplifier(s) connected to the Delta PRE
is powered off before checking any cable connections and
before power cycling the unit.
1 Everything appears to be powered on, but there is no sound.
P Adjust the volume control to a moderate level - audible but not
excessive (e.g. -35.00 dB).
P Make sure that the selected source component is powered on,
not in Standby mode, that it is playing an audio track and not in
pause mode.
P Ensure that the proper connector has been selected for the
current source.
P Try both analog and digital sources. For digital sources a le
format and sampling frequency will appear at the bottom of the
Home page. e word Idle appears when the digital source is not
providing a signal.
P Verify that the Mute control is NOT engaged. is also applies
to sources such as USB connected devices. For example, muting
iTunes will result in no output even though the Delta PRE is
setup and operating properly.
P Ensure that the amplier is powered up and not in Standby
mode.
P Verify that all cables are securely connected to the proper inputs
and outputs, with no kinks or stress points.
2 There is no sound and neither the Standby LED/Status
Indicator nor the touchscreen is lit.
P Ensure that the Delta PRE is properly connected to the electrical
outlet - the AC cord is positioned rmly in the AC mains
receptacle in the rear panel and the power switch is in the ON
position.
P If the Delta PRE is properly plugged in and the power from the
electrical outlet is at the proper level, try the following: Switch
o the main power switch on the rear panel, and unplug the unit
for at least thirty seconds. en plug the cord back in and try
powering up again. Sometimes, a brown-out (short-term power
loss/drop) can activate a protection mode, which requires a
power cycle to reset the Delta PRE to its normal operating mode.
P Remove the AC cord from the unit, and open the fuse holder
39
adjacent to the AC cord inlet. If the fuse is blown (best veried
An additional fuse mark on the switch indicates the fuses holders behind the
switch. The red frame shows the outline of the removable unit.
With a simple tool like a Swiss Army knife or a screwdriver No 1 or smaller the
unit (1) can be removed from the lter. On the topside (2) behind the switch
there are two fuse holders for each live connection. On the bottom side (3) is
a clip to carry an additional spare fuse.
using an ohm meter), contact your qualied Classé dealer for
replacement fuse based on the unit conguration below.
Mains voltage: 100-120VAC
Fuse type:
IEC time lag, low breaking capacity
Rating: 2AL 250V
Mains voltage: 200-240VAC
Fuse type:
IEC time lag, high breaking capacity
Rating: 1.25AH 250V
Removal of the combined switch / fuse holder unit
3 One speaker or subwoofer seems not to be playing.
P If the problem occurs with all inputs, check the interconnecting
P Check the balance control setting by pressing MENU on the
P If the problem occurs for a subwoofer only, make sure it is active
P Check the interconnect cables between the source component
4 The IR remote control does not seem to function.
P Ensure that there are no obstacles between the IR remote and the
P Check the orientation and if necessary, replace the batteries in
P Be sure the IR sensor is not awash in direct sunlight.
5 There is a hum coming out of the speakers.
P If you are using single-ended interconnects, make sure they are
40
cables between the preamp and the power amp. Also check the
speaker wires for secure connections.
front panel, and then verify the balance control setting is not
turning one channel o or reducing its output.
on the conguration assigned to this source button or the one
that has been independently selected.
and the Delta PRE.
IR sensor.
the remote control.
not placed alongside any AC power cords. Also make sure that
they are not too long – long single-ended interconnecting cables
have a natural tendency to pick up noise even when shielded.
P If any source components are connected to cable TV, try
disconnecting the cable television line from the source
component. If the hum goes away, you need an isolation device
between your cable TV converter and the source component.
Your Classé dealer can help you obtain one of these inexpensive
devices.
network/streaming
troubleshooting
1 The Network Status page shows Not Connected and there are
no green and amber lights illuminated on the Ethernet cable
connector on the rear panel.
P Check that the Ethernet cable is connected to an active Network.
P Try substituting the Ethernet cable to conrm whether the cable
itself is functioning.
P If using a wireless bridge, make sure it is connected to your
wireless Network and that you are using the correct connector
(labeled <...> on the Airport Express).
2 The Network status indicates Connected but the Delta PRE
does not appear on your list of devices in AirPlay or on your
DLNA Media Player.
P Restart all participating components one at a time until the
problem is resolved. First the media player, then the Delta PRE
(cycle the power o and on) and then your router. If the problem
persists verify that you have a valid IP address. If your address is
“Limited Auto IP” then the Delta PRE has auto assigned itself an
address and this indicates that your DHCP IP address server is
not working.
3 Streaming audio drops out frequently.
P Usually a problem associated with wireless networks, if you
are using a wireless bridge, make sure the signal strength from
your wireless router is good (they may need to be located closer
together) and devices that cause interference such as microwave
ovens are not in use.
P Your router may not have sucient bandwidth to consistently
handle the data rate of the audio stream. A higher-performance
router may be required.
4 The Delta PRE sometimes turns itself on unexpectedly.
P is is likely caused by “sounds” (e.g. mouse clicks, new mail
notications, etc.) generated by your computer activating the
auto select feature for your Network connection. Disable the
sounds to eliminate the unwanted behavior.
5 The Delta PRE sometimes turns itself off unexpectedly.
P is is likely caused by Auto Standby being enabled and
activated. See the description of Auto Standby under Advanced
Settings in System Setup.
41
Care & Maintenance
To remove dust from the cabinet of your Delta PRE, use a feather duster or
a lint-free soft cloth. To remove dirt and ngerprints, we recommend using a
microbre cloth and an anti-static spray such as lens or display cleaner applied to
the cloth, not directly onto the Delta PRE.
Dampen the cloth with cleaner uid rst and then lightly clean the surface of
the Delta PRE with the cloth. Do not use excessive amounts of cleaner that
might drip o the cloth and into the Delta PRE.
Caution! Power down and remove the AC power cord from the
Delta PRE before performing maintenance. At no time should
liquid cleaners be applied directly to the unit, as direct
application of liquids may result in damage to electronic
components within the unit.
42
Specifications
All specications are accurate at the time of printing. Classé reserves the right to
make improvements without notice.
General nGain Range -93 dB to +14 dB
nInput impedance (at 1kHz, single-ended / balanced) 50 kΩ
nOutput impedance (single-ended) 50 Ω
nOutput impedance (balanced) 200 Ω
nMaximum output level (single-ended) 9 Vrms
nMaximum output level (balanced) 18 Vrms
DSP Mode (Default mode using the DSP processor)
nFrequency response 10Hz - 84.5kHz
(50Ω source impedance)
nHarmonic Distortion <0.002% (20Hz to 20kHz)
(measurement bandwidth: 90kHz)
nIntermodulation Distortion <0.002%
(measurement bandwidth: 90kHz)
nMaximum input level - Single Ended 2.7 Vrms
(at 0dB gain) (+2.5dBr)
nMaximum input level - Balanced 5.4 Vrms
(at 0dB gain) (+2.5dBr)
nSignal-to-noise ratio
(22kHz BW, ref 4Vrms, A-wtd)
nCrosstalk -105dB at 100Hz
(one channel undriven - BAL/SE) -120dB at 1kHz
-120dB at 10kHz
nChannel Matching (Left to Right) +/- 0.06dB
nTone (0.5dB steps) +/- 6dB
nEQ (independant L/R, 0.5 dB steps) 5 band, +3dB/-20dB
105dB (108dBA)
Bypass Mode (Bypassing the DSP modules and using pure analog)
nFrequency response 1Hz - 2MHz
(-3dB, 50Ω source impedance)
nHarmonic Distortion <0.0004% at 1kHz
(measurement bandwidth: 90kHz) <0.0005% at 10kHz
<0.0006% at 20kHz
nIntermodulation Distortion <0.0001%
(measurement bandwidth: 90kHz)
nMaximum input level - Single Ended 4.5 Vrms
(at 0dB gain) (+15.3dBu)
nMaximum input level - Balanced 9 Vrms
(at 0dB gain) (+21.3dBu)
nSignal-to-noise ratio
(22kHz BW, ref 9Vrms, A-wtd)
130dB (133dBA)
43
Continued
nCrosstalk -143dB at 100Hz
(one channel undriven - BAL/SE) -140dB at 1kHz
-124dB at 10kHz
nChannel Matching (Left to Right) +/- 0.03dB
DAC (Digital inputs)
nFrequency response 5Hz - 90kHz
(-3dB, sweep Fs=192kHz)
nHarmonic Distortion <0.0015% (20Hz to 20kHz)
(measurement bandwidth: 90kHz)
nDynamic range 124dB
(-60dBFS, Fs=44.1kHz, A-wtd)
nSignal-to-noise ratio
(A-wtd, 22kHz BW, ref 4Vrms)
nJitter
<40ps
(Coaxial in, Fs=44.1kHz)
Phono (Measured 0dB gain, Bypass Mode, XLR Phono)
nRIAA deviation (20Hz - 20kHz) < 0.2dB
nLoad options for MM type (47k II) 50pF, 100pF, 150pF,
200pF, 250pF, 300pF,
350pF, 400pF, 450pF
nLoad options for MC - low output 7.5Ω, 10Ω, 33Ω, 50Ω,
82Ω, 100Ω, 330Ω, 1kΩ
nLoad options for MC - high output 47kΩ
nMM, MC - high output
Gain (1kHz, 20Ω source impedance) 41.5dB
SNR (22kHz BW, ref 5mVrms) 86dB (93dB A-wtd)
Max input level (overload ref 5mVrms) 11dB (20Hz)
23dB (1 kHz)
34dB (10kHz)
nMC - low output
Gain (1kHz, 20Ω source impedance, 1kΩ load) 60dB
SNR (22kHz BW, ref 0.5mVrms) 68dB (74dB A-wtd)
Max input level (overload ref 0.5Vrms, 1kΩ load) 12dB (20Hz)
31dB (1 kHz)
52dB (10kHz)
125dB
44
Headphone nPower 540mW
(nominal input, 0dB gain, 32Ω load)
nOutput impedance 6.8Ω
Continued
Format
Power consumption n Standby Power Consumption
nUSB Front 44.1k, 48k, 88.2k, 96k (iOS specic)
(Charging capability : 2.1A)
nUSB Back 32k, 44.1k, 48k, 88.2k, 96k,
176.4k, 192k, 352.8k, 384k,
DSD64, DSD128, DSD256 (Native - requires Windows driver),
DSD64, DSD128 (DoP)
nSPDIF 32k, 44.1k, 48k, 88.2k, 96k, 176.4, 192k,
(optical, coax, AES/EBU)) DSD64 (DoP)
nEthernet WAV, AIFF, ALAC, FLAC, WMA,
AAC, MP3, OGG_VORBIS (max 192k/24bit),
DSD64 (DoP)
(for North American 120V) Normal standby (WoN: disabled*) 0.25W
Network standby (WoN: enabled) 3.3W
RS232 standby (WoN: enabled) 3.6W
CAN-BUS standby (WoN: enabled) 3.3W
(*20 mins after AC is applied)
n Power Consumption
(for North American 120V) 68W
n Power Supply
(e PRE is congured to one of these AC congurations) 120V~ 50/60Hz
230V~ 50/60Hz
Note: Refer to the rear panel of the PRE for the congured voltage
100V~ 50/60Hz
n Operating Temperature 50-95 ° F (10-35 °C)
nOverall dimensions Width: 17.5” (445mm)
Depth (including connectors): 17.5” (449mm)
Height: 4.75” (121mm)
nNet weight 29.8 lbs (13.5 kg)
nShipping weight 39.2 lbs (17.8 kg)
For more information, see your Classé dealer, or contact our Headquarters at:
Sound United, LLC
One Viper Way
Vista, CA 92081
United States
Internet: https://classeaudio.com
45
Made for:
niPod touch (5th generation)
niPod touch (4th generation)
niPod touch (3rd generation) niPod nano (5th generation)
niPod touch (2nd generation) niPod nano (4th generation)
niPod touch (1st generation)
niPod classic
niPod nano (7th generation)
niPod nano (6th generation)
niPod nano (3rd generation)
niPod nano (2nd generation)
Made for:
niPhone Xr niPhone 5S
niPhone Xs
niPhone 8
niPhone 7 Plus
niPhone 7
niPhone 6S
niPhone 6
niPhone 5
niPhone 4S
niPhone 4
niPhone 3GS
niPhone 3
niPhone
Made for:
niPad mini (Retina)
niPad Air
niPad (4th generation)
niPad (3rd generation)
niPad mini
niPad 2
niPad
AirPlay:
AirPlay works with iPhone, iPod, and iPod touch with iOS 4.3.3 or later,
Mac with OS X Mountain Lion, and Mac and PC with iTunes 10.2.2 or
later.
Classé and the Classé logo are trademarks of Sound United, LLC. All rights reserved.
AMX® is a registered trademark of AMX Corporation of Richardson, TX. All rights reserved.
Crestron™ is a trademark of Crestron Electronics, Inc. of Rockleigh, NJ. All rights reserved.
Control 4™ is a trademark of Control 4 Corporation of Saltlake City UT. All rights reserved.
Savant® is a registered trademark of Savant Systems, LLC of Hyannis, MA.
“Made for iPod,” “Made for iPhone,” and “Made for iPad” mean that an electronic accessory has been designed
to connect specically to iPod, iPhone, or iPad, respectively, and has been certied by the developer to meet
Apple performance standards. Apple is not responsible for the operation of this device or its compliance with
safety and regulatory standards. Please note that the use of this accessory with iPod, iPhone, or iPad may aect
wireless performance.
iTunes, AirPlay, iPad, iPhone, iPod nano, and iPod touch are trademarks of Apple Inc., registered in the U.S.
and other countries.
46
Dimensions
0.75" (20mm)
16.5" (419mm)
4.75" (121mm)
4" (102mm)
16" (406mm)
17.5" (445mm)
17.5" (449mm)
49
Installation Worksheet
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50
Source: ______________________________________________________________
Audio Connector:______________________________________________________
Input:_______________________________________________________________
51
Classé
380, rue McArthur
Saint-Laurent, Québec
H4T 1X8 CANADA
Classé oers International Service and Support for its Products.
Please visit our Website to nd up-to-date Contact Information.
https://classeaudio.com
Copyright © 2019 Sound United, LLC
V 1.4 271119
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