H I GH- R ESO L U T I O N I N TER F A C E
with Realtime UAD Processing
Apollo 8 Hardware Manual
Manual Version 150408
Customer Service & Technical Support:
USA Toll-Free: +1-877-698-2834
International: +1-831-440-1176
www.uaudio.com
A Letter from Bill Putnam Jr.
Thank you for deciding to make an Apollo High-Resolution Interface part of your music
making experience. We know that any new piece of gear requires an investment of time
and money — and our goal is to make your investment pay off. The fact that we get to
play a part in your creative process is what makes our efforts meaningful, and we thank
you for this.
In many ways, the Apollo family of audio interface products represent the best examples
of what Universal Audio has stood for over its long history; from UA’s original founding in
the 1950s by my father, through our current vision of delivering the best of both analog
and digital audio technologies.
Starting with its high-quality analog I/O, Apollo’s superior sonic performance serves as
its foundation. This is just the beginning however, as Apollo products are the only audio interfaces that allow you to run UAD plug-ins in real time. Want to monitor yourself
through a Neve® console channel strip while tracking bass through a classic Fairchild or
LA-2A compressor? Or how about tracking vocals through a Studer® tape machine with
some added Lexicon® reverb?* With our growing library of more than 90 UAD plug-ins,
the choices are limitless.
At UA, we are dedicated to the idea that this powerful technology should ultimately serve
the creative process — not be a barrier. These are the very ideals my father embodied as
he invented audio equipment to solve problems in the studio. So as you begin to incorporate Apollo into your creative process, we hope that the excitement and pride that we’ve
built into it comes through. We believe Apollo will earn its way into your creative workflow by providing stunning fidelity, great ease-of-use, and rock-solid reliability for years to
come.
As always, please feel free to reach out to us via our website www.uaudio.com, and via
our social media channels. We look forward to hearing from you, and thank you once
again for choosing Universal Audio.
Sincerely,
Bill Putnam Jr.
*All trademarks are recognized as property of their respective owners. Individual UAD Powered Plug-Ins
sold separately.
Apollo 8 Hardware Manual Welcome 2
Table Of Contents
Tip: Click any section or page number
to jump directly to that page.
A Letter from Bill Putnam Jr. ................................................................. 2
Introduction ......................................................................................... 4
What is Apollo 8? ............................................................................................... 4
Apollo 8 Features .............................................................................................. 6
About Apollo 8 Documentation ............................................................................ 8
Web Documentation ........................................................................................... 9
Technical Support ............................................................................................ 10
Front Panel ........................................................................................ 11
Rear Panel ......................................................................................... 22
Digital I/O ....................................................................................................... 23
Analog I/O ...................................................................................................... 26
Installation & Configuration ................................................................. 29
Interconnections ................................................................................. 30
Installation Notes ............................................................................................ 30
Basic Setup .................................................................................................... 31
Typical Setup .................................................................................................. 32
Advanced Setup .............................................................................................. 33
Apollo Expanded: Multi-Unit Wiring ................................................................... 34
Specifications .................................................................................... 35
Block Diagram .................................................................................... 39
Troubleshooting .................................................................................. 40
Notices .............................................................................................. 41
Important Safety Information ............................................................................ 41
Warranty ......................................................................................................... 42
Maintenance ................................................................................................... 42
Repair Service ................................................................................................. 42
Apollo 8 Hardware Manual Table Of Contents3
Introduction
What is Apollo 8?
Thunderbolt Audio Interface with UAD-2 Processing
Apollo 8 is an elegant update to one of the world’s most popular professional audio interfaces — delivering enhanced sound with the tone, feel, and flow of analog recording.
This 18 x 24 Thunderbolt interface features powerful UAD-2 DUO or QUAD processing,
genuine UA analog design, and next-generation A/D and D/A conversion, putting classleading audio quality in a sleek new package.
Apollo 8 further distinguishes itself with Realtime UAD Processing and Unison™ technology, letting you record at near-zero latency through the full range of UAD plug-ins
from Neve, Studer, Manley, Lexicon, and more — including new mic preamp emulations
from Neve, API and Universal Audio.* Apollo Expanded software now allows cascading
up to four Apollos in a single system over Thunderbolt (Mac), so you can scale up your
studio as your needs grow.
Next-Generation Apollo A/D and D/A Conversion
Apollo 8 improves upon the original Apollo’s gold-standard audio quality with completely
redesigned, class-leading A/D and D/A conversion — giving you increased dynamic range
and even lower THD. This results in breathtaking clarity, depth, and accuracy in your
recordings, from tracking and overdubbing, to mixing and mastering.
Realtime UAD Plug-In Processing for Tracking, Mixing, and Mastering
While Apollo 8’s “natural” sound is very open and transparent, it can quickly deliver a
stunning range of classic analog tones and color via its Realtime UAD Processing. Available with UAD-2 DUO or QUAD processing onboard, Apollo’s DSP Acceleration allows for
recording through UAD Powered Plug-Ins — with as low as sub-2ms latency — letting
you monitor and “print” audio using classic analog emulations from Ampex, Lexicon,
Manley, Neve, Roland, SSL, Studer, and more.*
The Apollo 8’s bundled “Realtime Analog Classics Plus” suite of UAD plug-ins gives you
the UA 610-B Tube Preamp & EQ, Raw Distortion, Softube Amp Rooms, legacy LA2A, 1176, and Fairchild compressors, Pultec EQs, and more, so you have a rack full of
bonafide audio classics, right out of the box.
Using Apollo, UAD plug-ins are also available during mixing and mastering with a DAW,
putting UAD plug-ins (VST, RTAS, AU, AAX 64) at your disposal throughout the creative
process.
*All trademarks are recognized as property of their respective owners. Individual UAD Powered Plug-Ins
sold separately.
Apollo 8 Hardware Manual Introduction 4
Four Mic Preamps with Unison™ Technology
A Universal Audio breakthrough, Apollo 8’s Unison technology gives you the tone of the
world’s most sought-after tube and solid state mic preamps — including their impedance, gain stage “sweet spots,” and component-level circuit behaviors.
Based on unprecedented hardware-software integration between Apollo’s mic preamps
and its onboard UAD plug-in processing, Unison lets you record through stunning emulations like the bundled UA 610-B Tube Preamp plug-in, or exclusive preamp emulations
from API and Neve.
Unison technology is further enhanced in Apollo 8 to include its front panel Hi-Z instrument inputs, giving you dead-on impedance and gain matching for new stompbox models.
Apollo Expanded and Console 2.0
Thanks to Apollo Expanded software, users of Thunderbolt-equipped Apollo Twin, Apollo
8, Apollo 8p, and Apollo 16 audio interfaces can combine up to four Apollos and six
total UAD-2 devices — adding I/O and DSP as their studio grows. Apollo Expanded also
provides seamless integration with previous generation Apollos over Thunderbolt.
With Apollo 8’s Console 2.0 application — a complete re-imagining of Apollo’s original
Console software — you can take advantage of over 25 user-requested features such as
Channel Strip presets, Drag & Drop functionality, dynamically re-sizable windows, and
more.
Improved Monitoring and Workflow
Apollo 8 features a host of front-panel upgrades over the original Apollo, including Alt
Speakers, Dim, and Mono functions as well as input and output metering capabilities via
the new Meter button. These features combine with Apollo’s system scalability to make it
the new standard in professional multi-channel audio recording.
DSP Complement
Apollo 8 is available in two different configurations, which are differentiated by their
SHARC® DSP complement: Apollo 8 DUO with two DSPs, and Apollo 8 QUAD with four
DSPs. Apollo 8 DUO and QUAD have identical I/O features and functionality; the only
difference is how much UAD plug-in processing power is available for tracking and mixing. Either way, you have an amazing sounding interface that can achieve the professional sound quality of any era in recording history by using UAD Powered Plug-Ins.
Quite simply, Apollo 8 delivers the sound, feel, and flow of analog recording with all the
conveniences of modern digital equipment.
Apollo 8 Hardware Manual Introduction 5
Apollo 8 Features
Key Features
• Next-generation Apollo A/D and D/A conversion for professional music production
• Onboard UAD-2 DUO or QUAD Core DSP allows Realtime UAD Processing — record through plug-ins from Neve, Lexicon, Studer, Marshall, Ampex, and more*
• 4 Unison™-enabled mic preamps for tracking through preamp emulations from
Neve, API, and Universal Audio*
• 18 x 24 Thunderbolt 2 audio interface (Thunderbolt 1 compatible) for Mac with
powerful Console 2.0 software control
• Cascade up to 4 Apollo interfaces and 6 UAD devices total over Thunderbolt
• Convenient front panel monitoring functions including Alt Speakers, and assignable Alt 2, Dim, or Mono
• Includes “Realtime Analog Classics Plus” UAD plug-in bundle with 610-B Tube
Preamp & EQ, Raw Distortion, Softube Amp Rooms, legacy LA-2A, 1176, and
Fairchild compressors, Pultec EQs, and more
• World class UA analog design, superior components, and premium build quality
Audio Interface
• Sample rates up to 192 kHz at 24-bit word length
• 18 x 24 simultaneous input/output channels
• Eight channels of analog-to-digital conversion via mic, line, or high-impedance inputs
• 14 channels of digital-to-analog conversion via:
• Eight mono line outputs
• Stereo monitor outputs
• Two stereo headphone outputs
• 10 channels of digital I/O via:
• Eight channels ADAT Optical I/O with S/MUX for high sample rates
• Two channels coaxial S/PDIF I/O with sample rate conversion
• Two Thunderbolt 2 ports facilitates daisy-chaining of other Thunderbolt devices
Microphone Preamplifiers
• Four high-resolution, ultra-transparent, digitally-controlled analog mic preamps
• Unison™ technology for deep integration with UAD preamp and pedal plug-ins
• Front panel and software control of all preamp parameters
• Switchable low cut filter, 48V phantom power, pad, polarity inversion, and stereo
linking
*All trademarks are recognized as property of their respective owners. Individual UAD Powered Plug-Ins
sold separately.
Apollo 8 Hardware Manual Introduction 6
Monitoring
• Stereo monitor outputs (independent of the eight line outputs)
• Digitally-controlled analog monitor outputs maintains highest fidelity
• Front panel control of monitor levels and muting
• Two stereo headphone outputs with independent mix buses
• Independent front panel volume controls for headphone outputs
• Front panel pre-fader metering of monitor bus levels
• S/PDIF outputs can be set to mirror the monitor outputs
• Up to two alternate stereo monitor outputs selectable via front panel or Console software
• Assignable front panel monitor function switch for alternate speakers, dim, & mono
UAD-2 Inside
• DUO and QUAD models featuring two or four SHARC® processors
• Realtime UAD Processing on all analog and digital inputs
• Same features and functionality as other UAD-2 devices when used with DAW
• Can be combined with other UAD-2 devices for increased mixing DSP
• Includes UAD Powered Plug-Ins “Realtime Analog Classics Plus” bundle
• Complete UAD Powered Plug-Ins library is available at the UA online store
Software
Console application:
• Analog-style control interface for realtime monitoring and tracking
• Enables Realtime UAD Processing with UAD plug-ins
• Remote control of Apollo 8 features and functionality
• Virtual I/O for routing DAW tracks through Console
Console Recall plug-in:
• Saves Console configurations inside DAW sessions for easy recall
• Convenient access to Console’s monitor controls via DAW plug-in
• VST, RTAS, AAX 64, and Audio Units plug-in formats
UAD Meter & Control Panel application:
• Configures global UAD settings and monitors system usage
Other
• Easy firmware updates
• 1U rack-mountable form factor
• One year warranty includes parts and labor
Apollo 8 Hardware Manual Introduction 7
About Apollo 8 Documentation
Documentation for all Apollo components is extensive, so instructions are separated by
areas of functionality. Each functional area has a separate manual file. An overview of
each file, and how they are accessed, is provided in this section.
Note: Extensive Web Documentation, including technical information not available
in other publications, is also available.
Apollo Manual Files
Note: All manual files are in PDF format. PDF files require a free PDF reader application such as Preview (included with Mac OS X) or Adobe Reader.
Apollo Hardware Manuals
Each Apollo model has a unique hardware manual. The Apollo hardware manuals contain
complete hardware-related details about one specific Apollo model. Included are detailed
descriptions of all hardware features, controls, connectors, and specifications.
Note: Each hardware manual contains the unique Apollo model in the file name.
Apollo Software Manual
The Apollo Software Manual is the companion guide to the Apollo hardware manuals. It
contains detailed information about how to configure and control all Apollo software features for all Apollo models using the Console application, Console Settings window, and
Console Recall plug-in. Refer to the Apollo Software Manual to learn how to operate the
software tools and integrate Apollo’s functionality into the DAW environment.
Note: All Apollo models have the same software manual.
UAD System Manual
The UAD System Manual is the complete operation manual for Apollo’s UAD-2 functionality and applies to the entire UAD-2 product family. It contains detailed information
about installing and configuring UAD devices, the UAD Meter & Control Panel application, buying optional plug-ins at the UA online store, and more. It includes everything
about UAD except Apollo-specific information and individual UAD plug-in descriptions.
UAD Plug-Ins Manual
The features and functionality of all individual UAD Powered Plug-Ins is detailed in the
UAD Plug-Ins Manual. Refer to this document to learn about the operation, controls, and
user interface of each UAD plug-in that is developed by Universal Audio.
Direct Developer Plug-Ins
UAD Powered Plug-Ins includes plug-ins created by our Direct Developer partners. Documentation for these 3rd-party plug-ins are separate files written and provided by the
plug-in developers. The file names for these plug-in manuals are the same as the plug-in
titles.
Apollo 8 Hardware Manual Introduction 8
Installed Documentation Location
All documentation is copied to the startup disk during software installation:
• Macintosh HD/Applications/Universal Audio
Accessing Installed Documentation
Any of these methods can be used to access installed documentation:
• Navigate the file system within the Mac OS X Finder
• Choose “Documentation” from the Help menu within the Console application
• Click the “View Documentation” button in the Help panel within the UAD Meter &
Control Panel application
• Manuals are also available online: www.uaudio.com/support/manuals.html
Web Documentation
UA Support Videos
Many informational videos are available online to help you get started with Apollo:
• www.uaudio.com/support/thunderbolt
Apollo Support Page
The latest technical information for Apollo is posted on the Universal Audio website. The
Apollo Thunderbolt support page contains updated, late-breaking information that is not
available in other publications. Please visit this page for the latest news:
• www.uaudio.com/support/thunderbolt
UAD Users Forum
The unofficial UAD users forum, for the exchange of tips and information, is online at:
• www.uadforum.com
Apollo 8 Hardware Manual Introduction 9
Technical Support
Universal Audio provides free customer support to all registered Apollo users. Support
specialists are available to assist you via email and telephone during normal business
hours, which are from 9 AM to 5 PM, Monday through Friday, Pacific Standard Time.
Email Support
To request online support via email, click the link below for a direct link to the help
ticket form:
• https://www.uaudio.com/my/support/create/
Alternately, visit the main support page at www.uaudio.com/support, then click the blue
“Submit Support Ticket” button on the right side of the web page to create a help ticket.
Telephone Support
USA toll-free: +1-877-698-2834 (1-877-MY-UAUDIO)
International: +1-831-440-1176
Germany, Austria, Switzerland: +3-120-800-4912
Apollo 8 Hardware Manual Introduction 10
Front Panel
MONITOR
METER
ALT
FCN
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
1 2
C
0
-6
-3
-9
-12
-15
-18
-21
-27
88.2
RATE
44.1
48
176.4
96
192
HOST
CLOCK
INT
EXT
METER
IN
OUT
13
1716 18 19
20 22
21
14
15
This section describes the features and functionality of all controls and visual elements
on the Apollo 8 front panel.
Note: All front panel functions (except the METER switch, headphone volume
knobs, and power switch) can be controlled remotely with the included Console
software application. Changes made with the front panel controls are mirrored in
the Console application, and vice versa.
2 3 11
PREAMP
HI-Z 1 HI-Z 2
1
4 5 7
INPUT
PAD
+48V
Ø LINK
6 8 9
10
1 2 3 4
INPUT
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
MIC
LINE
Hi-Z
Hi-Z
CLIP
CLIP
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
12
Apollo 8 front panel (left portion)
(1) Hi-Z Inputs 1 & 2
The Hi-Z (high impedance) JFET direct inputs are for connecting low-level passive
devices such as electric guitar and bass instruments into channels 1 & 2 for A/D
conversion. Hi-Z input gain levels are adjusted with the Preamp control for the
associated channel.
The Hi-Z inputs have a default input impedance of 1M Ohms. The input impedance may
vary when Unison plug-ins are inserted on the channel within the Console application.
For details, see the Unison chapter in the Apollo Software Manual.
Note: Connect only ¼” unbalanced TS mono phone plugs to the Hi-Z inputs. TRS
stereo plugs cannot be used.
Automatic Input Detection
Hi-Z inputs 1 & 2 use the same A/D converter channels as the corresponding Mic 1 &
2 and Line 1 & 2 inputs. When a device is plugged into a Hi-Z input, the Mic and Line
inputs for the channel are overridden, the Mic/Line switch for the channel has no effect,
and the stereo link is severed (if active).
Important: To use Mic or Line inputs 1 or 2, its corresponding Hi-Z input must be
disconnected.
Apollo 8 Hardware Manual Front Panel 11
(2) Preamp Gain & Channel Select Knob
This rotary encoder with integrated switch has three functions:
Rotate – Rotating the knob adjusts the preamp gain for the selected input channel.
Press – Pressing the knob selects which preamp channel (1 – 4) is adjusted by the front
panel preamp controls.
Press+Hold – When a Unison plug-in is active in the channel’s dedicated Unison insert
within the Console application, pressing and holding the knob enters/exits Unison Gain
Stage Mode.
Each of the three functions above is explained in greater detail below.
Preamp Gain
The preamp gain of analog inputs 1 – 4 is adjusted with the rotary control. The preamp
channel to be adjusted is set with the Channel Select (press) function. The input to be
adjusted (Mic, Line, or Hi-Z) is determined by the state of the channel’s Mic/Line switch
(#4) or Hi-Z input (if connected).
Rotating the knob clockwise increases the preamp gain for the selected channel. The
available gain range for the preamp channels is 10 dB to 65 dB for the Mic, Line, and
Hi-Z inputs.
More than one full revolution of the knob is needed to move through the available range.
This feature increases the control resolution for more precise preamp gain adjustments.
Tip: To adjust signal levels for inputs 5 – 18, use the output level controls of devices connected to those inputs.
Line Input Gain Bypass
By default, line inputs 1 – 4 are routed through the channel’s preamp so the line input
level can be adjusted with the Gain knob. However, line inputs 1 – 4 can be individually
set to completely bypass the channel’s preamp circuitry and instead be routed directly to
the channel’s A/D converter at a fixed reference level. This feature is set with the LINE
INPUT GAIN menu in the Hardware panel within the Console Settings window.
Tip: This feature routes the preamp channel’s line input signal directly into the
D/A converter for the purest path when additional gain is not needed (for example,
when connecting external mic preamps to preamp channel line inputs).
When the channel’s LINE INPUT GAIN menu is set to BYPASS in Console Settings:
• The Preamp Gain Indicator ring (#3) for the channel is solid green
• When the Gain knob (#2) is rotated, the ring flashes to indicate that no gain adjustment is occurring
• If a Unison plug-in is in the channel’s dedicated Unison insert in Console, the
Unison plug-in is bypassed
Apollo 8 Hardware Manual Front Panel 12
Channel Select
Pressing the Preamp knob changes the currently selected preamp channel, which determines which input (1 – 4) is adjusted by the front panel preamp controls. A preamp
channel is selected for adjustment when its Channel Select Indicator (#11) is
illuminated.
Each time the knob is pressed, the selected preamp channel increments to the next
preamp channel. If stereo linking is active, the stereo pairs are selected.
Gain Stage Mode
Gain Stage Mode is activated by pressing and holding the Preamp knob for two seconds
when a Unison plug-in is active in the channel’s dedicated Unison insert within the
Console application. When Gain Stage Mode is active, pressing and holding the knob for
two seconds deactivates Gain Stage Mode.
Gain Stage Mode is active when the Channel Select Indicator (#11) for the currently
selected channel is flashing. In this state, pressing the Gain knob cycles through the
available gain parameters within the Unison plug-in so each gain stage in the plug-in can
be adjusted from the front panel.
Note: For complete details about Gain Stage Mode, see the Unison chapter within
the Apollo Software Manual.
(3) Preamp Gain Level & State Indicator
Preamp Gain Level Indicator
The amount of preamp gain for the currently selected channel is indicated by the illuminated ring surrounding the Preamp knob.
The ring indicates relative gain levels and is not calibrated to indicate any specific dB
value. However, precise numerical dB gain values for the preamps are displayed within
the Console application.
Note: If the ring is at maximum and flashes when the Preamp knob is rotated, the
channel’s LINE input is selected and LINE INPUT GAIN is set to BYPASS. See
Line Input Gain Bypass for additional details.
Apollo 8 Hardware Manual Front Panel 13
Preamp State Indicator
In addition to the channel’s relative preamp gain, the ring also indicates the current state
of the preamp channel:
Green (variable) – The preamp is in default operating mode with variable gain
Green (fixed at maximum) – LINE is selected for the channel (#4) and LINE INPUT GAIN
is set to BYPASS in the Hardware panel within the Console Settings window
Unlit – The preamp gain is set to its minimum value
Orange – A Unison plug-in is active in Console’s dedicated Unison insert for the channel.
Note: See the Unison chapter within the Apollo Software Manual for complete
details about Unison operation.
(4–9) Preamp Options
This set of six switches control the preamp options for input channels 1 – 4. Press the
switches to toggle the setting. The current state of each preamp option is indicated by
the LED within each switch. Each switch function is detailed below.
(4) Mic/Line
This switch switches between the channel’s Mic (XLR) and Line (¼”) inputs on the rear
panel combo jacks. This switch has no effect if the channel’s Hi–Z input is connected
(the Hi-Z input must be disconnected to use the Mic/Line inputs).
Note: Line inputs 1 – 4 can be set to bypass the preamp circuitry. See Line Input
Gain Bypass for additional details.
(5) Low Cut Filter
When enabled, the channel’s input signal passes through a low cut (high pass) filter. This
2nd-order coincident-pole filter has a cutoff frequency of 75 Hz with a slope of 12 dB
per octave.
The Low Cut filter affects the Mic, Line, and Hi-Z inputs. Low Cut is typically used to
eliminate rumble and other unwanted low frequencies from the input signal.
(6) Phantom Power (+48V)
When enabled, 48 volts of phantom power is supplied at the channel’s rear panel XLR
input. Most modern condenser microphones require 48V phantom power to operate. This
option can only be activated when the Mic/Line switch (#4) is set to Mic.
Note: Depending on the current configuration of the hardware and software, there
may be a delay when changing the 48V state to minimize the clicks/pops that are
inherent when engaging phantom power. The +48V LED will blink rapidly during
any delay.
Apollo 8 Hardware Manual Front Panel 14
(7) Pad
When enabled, the channel’s XLR input signal level is attenuated by 20 dB. Pad does
not effect the Line or Hi-Z inputs.
Pad can be used to reduce signal levels when overload distortion is present at low
preamp gain levels, such as when particularly sensitive microphones are used on loud
instruments, and/or if the A/D converter is clipping.
(8) Polarity
When enabled, the polarity (aka “phase”) of the input channel’s signal is inverted.
Polarity affects the Mic, Line, and Hi-Z inputs.
Tip: Polarity inversion can help reduce phase cancellations when more than one
microphone is used to record a single source.
(9) Stereo Link
This switch links the preamp controls of adjacent channels together (1+2 or 3+4) to
create stereo input pairs. When channels are linked as a stereo pair, any preamp control
adjustments will affect both channels of the stereo signal identically.
Note: Only the same type of inputs can be linked (Mic/Mic or Line/Line). The Hi-Z
inputs cannot be linked.
(10) Input Indicators
These indicators (MIC/LINE/HI-Z) display which input is currently active for the channel.
To select MIC or LINE, use the INPUT switch (#4). To select Hi-Z, plug a ¼” mono TS
cable into the Hi-Z input.
LINE indicator color
The color of the LINE indicator changes to reflect the state of the LINE INPUT GAIN
setting, which is configured in the Hardware panel within the Console Settings window.
White – The line input is routed through the preamp so the input gain can be adjusted.
Green – The preamp circuitry is bypassed and the line input is fixed at a reference level
of +4 dBu.
(11) Channel 1 – 4 Select Indicators
The currently selected preamp channel is indicated by the illuminated numbers above
level meters 1 – 4. When a preamp channel (or channels, when stereo linked) is
selected, its channel number is illuminated. The currently selected channel increments
when the Preamp knob (#2) is pressed.
Note: The numbers for channels 5 – 8 do not illuminate, as they cannot be selected for front panel control adjustments.
Apollo 8 Hardware Manual Front Panel 15
(12) Channel Level Meters
The 10-segment LED channel meters display the input or output signal peak levels for
analog channels 1 – 8. Input or output metering is selected with the METER switch
(#19), and the input/output state is shown by the METER indicators (#15).
The dB values of the meter LEDs are indicated between the meters for channels 4 and 5.
When digital clipping occurs in input (when 0 dBFS is exceeded), the red “C” (clip) LED
illuminates.
Input Channel Meters
When set to INPUT, the channel meters display the signal peak input levels for analog
channels 1 – 8 at the input to the A/D converters.
Avoid digital clipping at the channel’s A/D converter by reducing the output level of
the device connected to the channel’s input, and/or in the case of channels 1 – 4, by
reducing the preamp gain and/or engaging the Pad (#7) and readjusting gain as needed.
Output Channel Meters
When set to OUTPUT, the channel meters display the signal peak output levels for analog
channels 1 – 8 at the output of the D/A converters.
13
HOST
HOST
CLOCK
CLOCK
INT
INT
EXT
EXT
METER
METER
IN
IN
OUT
OUT
15
14
1716 18 19
1 2
1 2
RATE
RATE
44.1
44.1
48
48
88.2
88.2
96
96
176.4
176.4
192
192
C
C
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
METER
ALT
FCN
20 22
23
MONITOR
21
24
OUT
HEADPHONES
25
26
21
POWER
OFF
Apollo 8 front panel (right portion)
(13) HOST Indicator
The HOST indicator displays the status of the Thunderbolt connection to the host
computer system. The possible states are:
Lit – The unit is communicating with the host computer and operating normally.
Unlit – The unit is starting up or it is not recognized by the host computer. Verify
software installation and Thunderbolt connections.
Red – System error. Please contact technical support if the issue persists.
Apollo 8 Hardware Manual Front Panel 16
(14) CLOCK Indicators
The clock source and status are displayed with these indicators. Either internal (INT) or
external (EXT) is displayed. The clock source is set within the Console application; see
the Apollo Software Manual for details.
Internal Clock
When set to internal clock, the INT indicator is illuminated white.
External Clock
Apollo 8 can use an external clock from the Word Clock, S/PDIF, or ADAT inputs. The
EXT indicator has two possible states:
White – When set to external clock and a valid clock signal is detected at the specified
port, the EXT indicator is illuminated white and Apollo 8 is synchronized to the external
clock source.
Red – When set to external clock and a valid clock signal is NOT detected at the
specified port, the EXT indicator is illuminated red and the internal clock remains active
instead. In this situation, if/when the specified external clock becomes available, Apollo
8 switches back to the external clock, and the EXT indicator is illuminated and white.
Important: When set to use any external clock source, Apollo 8’s sample rate must
be manually set to match the sample rate of the external clock.
(15) METER Indicators
These indicators show the current state of the Channel Level Meters (#12). The current
state is changed with the METER switch (#19).
IN – When IN is illuminated, the channel meters display analog input signal levels.
OUT – When OUT is illuminated, the channel meters display analog output signals levels.
(16) Power Indicator (UA Logo)
The Universal Audio logo illuminates when the external power supply is properly
connected to the AC outlet and the power input on the rear of the unit, and the Power
switch (#26) is in the up position.
(17) Sample Rate Indicators
These indicators display the current sample rate setting for A/D and D/A conversion.
The sample rate is set within the Console application or the host DAW; see the Apollo
Software Manual for details.
Apollo 8 Hardware Manual Front Panel 17
(18) Monitor Output Level Meters
The 10-segment LED meters display the signal peak output levels of the rear panel Left
& Right Monitor outputs at the output of the D/A converters. These meters are before the
Monitor Level control (pre-fader) and reflect the D/A converter levels regardless of the
current Monitor Level and Headphone Level knob settings.
The dB values of the monitor meter LEDs are indicated between the left and right
channel meters. When digital clipping occurs, the red “C” (clip) LED illuminates.
If the monitor output level clips, reduce the monitor output level within the DAW and/or
reduce the output level of individual channels feeding the monitor output bus within the
Console application.
(19) Meter Switch
This switch determines whether the Channel Level Meters (#12) are displaying input
levels or output signal levels. Pressing the switch toggles the state of the meters and the
Meter Indicators (#15).
(20) Monitor ALT Switch
When ALT monitoring is configured in the Hardware panel within the Console Settings
window (when ALT COUNT is set to a non-zero value), this switch toggles between the
main monitor outputs and the ALT 1 outputs (line outputs 1 & 2).
When the ALT switch is engaged:
• The monitor signals are routed to outputs 1 & 2 instead of the main monitor outputs
• The orange LED within the switch is illuminated
• The Monitor Level Indicator (#23) is orange instead of green
For complete details about how to configure and use the ALT monitoring features, refer to
the Apollo Software Manual.
Tip: ALT 2 outputs (line outputs 3 & 4) can be selected with the FCN switch
(#21, when configured in Console Settings) or in the Monitor column within the
Console application.
Apollo 8 Hardware Manual Front Panel 18
(21) Monitor Function Switch (FCN)
This is an assignable switch that can be configured to control one of three monitoring
functions. The function of the switch is configured with the FCN SWITCH ASSIGN menu
the Hardware panel within the Console Settings window; see the Apollo Software Manual
for details.
The amber LED within the switch flashes when the monitoring function is active. The
function is toggled with the switch is pressed again. The available functions are:
ALT 2 – Selects the Alternate 2 monitor speakers. The monitor signals are routed to
outputs 3 & 4 instead of the main monitor outputs, and the Monitor Level Indicator
(#23) is amber instead of green when ALT 2 is active.
MONO – Sums the left and right channels of the stereo monitor mix into a monophonic
signal. The Monitor Level Indicator (#23) flashes when MONO is active.
DIM – Attenuates the signal level at the monitor outputs by the dB amount set in the
Control Room strip within the Console application. The Monitor Level Indicator (#23)
flashes when DIM is active.
Note: When more than one Apollo interface is connected in a multi-unit configuration, the FCN switch is operable on the designated monitor unit only.
(22) Monitor Level & Mute Knob
This rotary encoder serves two functions. Rotating the knob adjusts the monitor output
level, and pressing the knob mutes the monitor outputs.
Monitor Level
Rotating the knob clockwise increases the signal level at the Left & Right Monitor
Outputs on the rear panel. If ALT monitor outputs are configured and active, this knob
controls the signal level at the ALT monitor’s line outputs.
Although this is a digital control, the Left & Right Monitor Outputs volume is attenuated
in the analog domain, after D/A conversion (digitally-controlled analog volume). This
method provides the utmost monitoring fidelity, in contrast to digital volume controls that
reduce levels by truncating the digital word length (aka “dropping bits”).
Apollo 8 Hardware Manual Front Panel 19
Monitor Output Gain Bypass
By default, monitor output levels are continuously variable. However, the monitor
outputs can be set to completely bypass the monitor level circuitry and operate at a
fixed reference level. This feature is set with the MONITOR OUTPUT GAIN menu in the
Hardware panel within the Console Settings window.
Tip: This feature routes the signal directly from the D/A converters to the monitor
outputs for the purest signal path when level control is not needed (for example,
when connecting the monitor outputs to an external monitor controller).
When the MONITOR OUTPUT GAIN menu is set to BYPASS in Console Settings:
• The Monitor Level Indicator ring (#23) is solid green
• When the Monitor knob (#22) is rotated, the ring flashes to indicate that no level
adjustment is occurring
• ALT monitoring and assignable FCN switch features are unavailable
Monitor Mute
Pressing the Monitor knob toggles the mute state of the signals at the Left & Right
Monitor Outputs on the rear panel. If ALT monitoring is configured in the Hardware panel
within the Console Settings window (when ALT COUNT is a non-zero value), the ALT
monitor outputs are also muted by this control.
When the monitor outs are muted, the Monitor Level Indicator ring (#23) is red.
Note: Monitor Mute does not mute the headphone outputs.
Apollo 8 Hardware Manual Front Panel 20
(23) Monitor Level & Monitor State Indicator
Tip: The Monitor Level and Monitor State indications are reflected in the Monitor
column within the Console application.
Monitor Output Level Indicator
The relative signal level at the rear panel monitor outputs (and ALT monitor outputs, if
configured) is indicated by the illuminated ring surrounding the Monitor Level knob.
This indicator is after the Monitor Level control (post fader). It indicates relative levels
only and is not calibrated to specific dB values.
Monitor State Indicator
The color of the indicator ring indicates the current state of the monitor outputs:
Green (variable) – The main monitor outputs are active with variable level control
Green (fixed at maximum) – MONITOR OUTPUT GAIN is set to BYPASS in the Hardware
panel within the Console Settings window
Red – The main monitor outputs (and ALT monitor outputs, if configured) are muted
Orange – The ALT 1 monitor outputs are active
Amber – The FCN switch is active and assigned ALT 2
Flashing – The monitor DIM and/or MONO functions are active
(24) Headphone Level Knobs 1 & 2
These knobs control the volume of Headphone Outputs 1 & 2 on the front panel. Each
headphone output has its own volume control.
(25) Headphone Outputs 1 & 2
These ¼” stereo TRS phone jacks are for connecting stereo headphones to Apollo 8.
Headphone outputs 1 & 2 are individually addressable.
By default, both headphone outputs mirror the monitor outputs. When mirroring the
monitor outputs, the headphone outputs are unaffected by Monitor Mute (#18), to facilitate recording/tracking with headphones while the monitor speakers are muted.
Unique mixes can be created for each headphone output using the CUE functions within
Console or by assigning mix buses from a DAW to the headphone outputs via the device
drivers.
(26) Power Switch
This switch applies power to Apollo 8. When the unit is powered on, the Universal Audio
logo (#16) is illuminated. The external power supply must be properly connected for this
switch to function.
Apollo 8 Hardware Manual Front Panel 21
Rear Panel
LINE IN
7 5
68R
L1357
248 6
34
35
33
27
28
ADAT S/MUX
UNIVERSAL AUDIO, INC.
32
29
75 Ω
TERM
30
WORD CLOCK
31
S/PDIF
WORD
CLOCK
Apollo 8 rear panel (digital portion)
(27) Power Input
The included external power supply connects to this 4-pin locking XLR jack. Apollo 8
requires 12 volts DC power and draws approximately 50 Watts.
To eliminate risk of circuit damage, connect only the factory-supplied power supply. Use
the Power switch on the front panel to power the unit on and off.
Important: Do not disconnect the power supply while Apollo 8 is in use, and
confirm the Power switch is in the “off” position before connecting or disconnecting the power supply.
Apollo 8 Hardware Manual Rear Panel 22
Digital I/O
(28) ADAT S/MUX Optical Ports
These ports use the ADAT Lightpipe Optical Interface protocol for interconnecting with
other audio hardware devices in the digital domain. Two ADAT inputs and two ADAT
outputs are provided, routing a total of eight channels of digital audio. The channels
routed by these ports depend on the current system sample rate.
At sample rates of 44.1 kHz and 48 kHz, the original ADAT protocol is used, and eight
audio channels are routed on one ADAT port. At higher sample rates, industry standard
S/MUX is used to maintain high-resolution transfers.
Important: To utilize all eight channels with the optical ports at sample rates
of 88.2 kHz and above, ADAT ports 1 & 2 must both be connected to the other
device, and the other device must also support the ADAT S/MUX protocol.
The following behaviors apply to the ADAT ports:
• At sample rates of 44.1 kHz and 48 kHz, port 1 supports eight channels of I/O.
Output 2 mirrors output 1, and input 2 is disabled.
• At sample rates of 88.2 kHz and 96 kHz, up to four channels of audio are routed
per port (eight channels total, when both ports are used).
• At sample rates of 176.4 kHz and 192 kHz, up to two channels of audio are
routed per port (four channels total, when both ports are used). Only four ADAT
channels are supported at 176.4 kHz and 192 kHz.
The ADAT port channel assignments described above are summarized in this table:
ADAT PORT CHANNEL ROUTING
Sample Rate (kHz) Input Port 1 Input Port 2 Output Port 1 Output Port 2
44.1 & 48 1 – 8 Disabled 1 – 8 1 – 8 (mirror of port 1)
88.2 & 96 1 – 4 5 – 8 1 – 4 5 – 8
176.2 & 192 1 – 2 3 – 4 1 – 2 3 – 4
Note: The ADAT ports use TOSLINK JIS F05 optical connectors. Some devices
use this type of connector for optical S/PDIF connections. However, Apollo 8’s
ADAT ports do not support the S/PDIF protocol.
Apollo 8 Hardware Manual Rear Panel 23
(29) 75 Ohm Word Clock Termination Switch
This switch provides internal 75-ohm word clock input signal termination when required.
Word clock termination is active when the switch is engaged (depressed).
Apollo 8’s termination switch should only be engaged when Apollo 8 is set to sync to
external word clock and it is the last device at the receiving end of a word clock cable.
For example, if Apollo 8 is the last “slave” unit at the end of a clock chain (when Apollo
8’s word clock out port is not used), termination should be active.
(30) Word Clock I/O
Word Clock In
Apollo 8’s internal clock can be synchronized (slaved) to an external master word clock.
This is accomplished by setting Apollo 8’s clock source to Word Clock within the Console
application, connecting the external word clock’s BNC connector to Apollo 8’s word
clock input, and setting the external device to transmit word clock. If Apollo 8 is the last
device in the clock chain, the Termination switch (#10) should be engaged.
Important: Apollo 8’s sample rate must be manually set to match the incoming
clock’s sample rate.
Note: Apollo 8 can be synchronized to an external “1x” clock signal only. Superclock, overclocking, and subclocking are not supported.
Word Clock Out
This BNC connector transmits a standard (1x) word clock when Apollo 8 is set to use its
internal clock. The clock rate sent by this port matches the current system sample rate,
as specified within the Console application.
When Apollo 8 is set to use external word clock as its clock, Apollo 8 is a word clock
slave. If the incoming external word clock is within ±0.5% of a supported sample rate
(44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz), Word Clock Out will mirror
Word Clock In with a slight phase delay (about 40ns).
Because Apollo 8’s word clock output is not a true mirror of the word clock input, word
clock out should not be used to daisy chain the word clock if Apollo 8 is in the middle
of the word clock chain. The correct method to connect Apollo 8 in the middle of a word
clock chain is to use a T-connector at Apollo 8’s word clock input and leave Apollo 8’s
word clock output unconnected (the Termination switch should not be engaged in this
scenario).
Apollo 8 Hardware Manual Rear Panel 24
(31) S/PDIF Ports
The S/PDIF ports provide two channels of digital I/O with resolutions up to 24-bit at
192 kHz via female phono (RCA) connectors. For optimum results, use only high-quality
75-ohm cables specifically designed for S/PDIF digital audio.
Sample rate conversion can be performed on the S/PDIF input; this setting is enabled
within the S/PDIF channel’s input strip in the Console application. When the sample rate
of the incoming S/PDIF signal does not match the sample rate specified in the Console
application, the S/PDIF signal is converted to match Apollo 8’s sample rate. If Apollo 8
is set to use S/PDIF as the master clock source, sample rate conversion is inactive.
Tip: The S/PDIF output can be configured to mirror the Monitor Outputs (#34), for
routing the stereo monitor signal to the stereo S/PDIF input of other devices. This
feature is set with the DIGITAL MIRROR menu in the Hardware panel within the
Console Settings window.
(32) Thunderbolt Ports
Apollo 8 has two Thunderbolt 2 ports. One port is used to connect Apollo 8 to a
Thunderbolt 1 or Thunderbolt 2 port on the host computer. Thunderbolt peripheral
devices may be serially connected (daisy-chained) to the second Thunderbolt port.
When Apollo 8 is properly communicating with the host computer via Thunderbolt, the
HOST indicator (#13) illuminates.
Thunderbolt Bus Power
Per the Thunderbolt specification, bus power is supplied to downstream (daisy-chained)
Thunderbolt peripheral devices. Apollo 8p must be powered on for the daisy-chained
peripheral to receive Thunderbolt bus power.
Apollo 8 Hardware Manual Rear Panel 25
Analog I/O
33
248 6
34
L1357
35
7 5
4 2
LINE IN
68R
36
MIC/LINE IN
3 1
1
Apollo 8 rear panel (analog portion)
(33) Line Outputs 1 – 8
The individually addressable line-level analog outputs use balanced ¼” TRS phone
jacks. Unbalanced ¼” TS cables can also be used.
The Line Outputs can be configured in adjacent pairs to use –10 dBV or +4 dBu
reference levels. This function is configured in the Hardware panel within the Console
Settings window.
ALT Outputs 1 – 4
Apollo 8 features ALT (alternate) monitoring capabilities. ALT monitoring can be used to
control up to two alternate pairs of monitor speakers.
When ALT monitoring is enabled, the output level and muting of line outputs 1 & 2
(ALT 1) and 3 & 4 (ALT 2) are controlled by the Monitor Level & Mute knob (#22). ALT
monitoring is enabled in the Hardware panel within the Console Settings window by
increasing the ALT COUNT setting to a non-zero value.
Note: ALT monitoring features are unavailable when MONITOR OUTPUT GAIN is
set to BYPASS. See Monitor Output Gain Bypass for related information.
Apollo 8 Hardware Manual Rear Panel 26
(34) Left & Right Monitor Outputs
These balanced ¼” TRS phone jacks are line-level analog outputs typically used for
connection to a stereo loudspeaker monitoring system. Unbalanced ¼” TS cables can
also be used.
The signal levels and muting at these outputs are controlled with the Monitor Level &
Mute knob (#22).
Note: If MONITOR OUTPUT GAIN is set to BYPASS in the Hardware panel within
the Console Settings window, the Monitor Level knob does not control the Monitor
or ALT output levels. See Monitor Output Gain Bypass for related information.
The Monitor Outputs are completely independent from the eight Line Outputs (except
when ALT monitoring is configured). By default, the “1–2” or “L–R” or “Main” outputs
from a DAW are routed to these outputs (these labels vary within each particular DAW).
Tip: The S/PDIF output (#31) can be configured to mirror the Monitor Outputs, for
routing the stereo monitor signal to the stereo S/PDIF input of other devices. This
feature is set with the DIGITAL MIRROR menu in the Hardware panel within the
Console Settings window.
(35) Line Inputs 5 – 8
These individually addressable line-level analog inputs use balanced ¼” TRS phone
jacks. Unbalanced ¼” TS cables can also be used.
Line Inputs 5 – 8 can be individually configured to use –10 dBV or +4 dBu reference
levels. This option is set in the channel input strips within the Console application.
Line Inputs 5 & 6 and 7 & 8 can be stereo linked via the Console application.
Apollo 8 Hardware Manual Rear Panel 27
(36) Mic/Line Inputs 1 – 4
Analog preamp inputs 1 – 4 use XLR/TRS combination jacks. XLR plugs are routed to the
channel’s microphone input, and TRS plugs are routed to the channel’s line input.
Inputs 1 – 4 are switched between the XLR and Line connections using the front panel
switch (#4) or the Console application.
Note: The Hi-Z inputs override the Mic/Line inputs on channels 1 & 2.
Adjacent inputs 1 & 2 and/or 3 & 4 can be stereo linked via the front panel Link switch
(#9) or the Console application.
XLR Inputs 1 – 4
The balanced Microphone inputs accept XLR plugs. Pin 2 is wired positive (hot).
+48V phantom power is available for the XLR inputs via the front panel switch (#6) or
the Console application.
Line Inputs 1 – 4
Line Inputs 1 – 4 accept balanced ¼” TRS phone plugs. Unbalanced ¼” TS plugs can
also be used.
Inputs 1 – 4 Gain
XLR Input Gain
The XLR mic inputs are always routed into the channel’s microphone preamplifier.
The gain is controlled by the PREAMP knob (#2) when the channel is selected, or the
Console application. The mic preamps provide up to 65 dB of gain.
¼” Input Gain
Line inputs 1 – 4 can be individually routed into the channel’s preamplifier for variable
gain adjustments, or the preamp circuitry can be completely bypassed for the purest
path directly into the D/A converter. This option is set with the LINE INPUT GAIN menu
in the Hardware panel within the Console Settings window. By default, line inputs 1 – 4
are routed into the preamp.
When the preamps are bypassed, line inputs 1 – 4 operate at a fixed reference level
of +4 dBu. When routed into the preamps, gain for line inputs 1 – 4 is continuously
variable with up to 65 dB of available gain.
Note: For related information, see Line Input Gain Bypass.
Apollo 8 Hardware Manual Rear Panel 28
Installation & Configuration
Note: Items on this page are detailed in the Apollo Software Manual. See About
Apollo 8 Documentation for related information.
System Requirements
All system requirements must be met for Apollo 8 to operate properly. Before proceeding
with installation, see the system requirements in the Apollo Software Manual.
Software Installation
The software must be installed to use the hardware and UAD plug-ins. The UAD Powered
Plug-Ins software installer contains the Apollo 8 software and drivers.
To obtain the latest UAD Powered Plug-Ins software installer, visit:
• www.uaudio.com/downloads
Registration and Authorization
Apollo 8 must be registered and authorized at my.uaudio.com to unlock UAD plug-ins
that are bundled with the product. Registration and authorization via a web browser is
triggered automatically by the UAD software the first time the device is connected.
System Configuration
Complete details about setting up the Apollo 8 system, including how to integrate with a
DAW and related information, are included in the Apollo Software Manual.
Console Application
The included Console application is the software interface for the Apollo 8 hardware.
Console controls Apollo 8 and its digital mixing, monitoring, and Realtime UAD
Processing features. Console is also used to configure Apollo 8’s I/O settings such as
sample rate, clock source, and reference levels.
For complete details about how to operate Console, refer to the Apollo Software Manual.
Apollo Expanded
When more I/O and/or DSP is needed, up to four Apollo interfaces can be cascaded
together via Thunderbolt in a multiple-unit configuration. For complete details about
multi-unit cascading, refer to the Apollo Software Manual.
UA Support Videos
Many informational videos are available online to help you get started with Apollo 8:
• www.uaudio.com/support/thunderbolt
Apollo 8 Hardware Manual Installation & Configuration 29
Interconnections
Installation Notes
• Apollo 8 may get hot during normal operation if it doesn’t receive adequate airflow
circulation around its chassis vents. For optimum results when mounting Apollo 8
in a rack, leaving at least one empty rack space above the unit to allow adequate
airflow for cooling is recommended.
• As with any sound system, the following steps are recommended to avoid audio
spikes in your speakers:
• Apply power to the speakers last, after all other devices (including Apollo 8)
are powered on.
• Turn off the speakers first, before all other devices (including Apollo 8) are
powered off.
Thunderbolt Connections
• Apollo 8 must be connected directly to a Thunderbolt port on the host computer.
The Apple Thunderbolt to FireWire Adapter cannot be used for the host computer
connection.
• Connect only one Apollo 8 Thunderbolt port to the host computer. Thunderbolt is
a bidirectional protocol.
• Apollo 8 cannot be bus powered via Thunderbolt. The included external power
supply must be used.
• Thunderbolt bus power is supplied to downstream (daisy-chained) peripheral
devices. Apollo 8 must be powered on for the daisy-chained peripheral to receive
Thunderbolt bus power.
About Thunderbolt 2
• Apollo 8 is a Thunderbolt 2 device. Thunderbolt 2 technology is designed for
backwards compatibility with Thunderbolt 1.
• Apollo 8 can be connected to Mac computers and other devices that have Thunderbolt 1 ports or Thunderbolt 2 ports.
Apollo 8 Hardware Manual Interconnections 30
Basic Setup
This diagram illustrates a simple Apollo 8 setup that could be used by an individual
musician/engineer for recording and mixing. It shows an electric guitar connected to the
Hi-Z input of channel 1 and a microphone connected to the XLR input of channel 2 so
they can both be recorded simultaneously.
Key points for this example:
• Two preamp channels are used (electric guitar and microphone)
• Mic/Line switch for channel 2 is set to MIC
• Monitor outputs are connected to powered monitors (or an amp+speaker system)
Instrument
Headphones
HI-Z 1 HI-Z 2
ADAT S/MUX
Thunderbolt
Mac
PREAMP
INPUT
+48V
Ø LINK
75 Ω
TERM
PAD
WORD CLOCK
INPUT
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
MIC
LINE
Hi-Z
Hi-Z
S/PDIF
WORD
CLOCK
Basic Apollo connections
HOST
CLIP
CLIP
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
HOST
CLOCK
CLOCK
METER
METER
INT
INT
EXT
EXT
IN
IN
OUT
OUT
RATE
C
C
0
0
44.1
44.1
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
7 5
LINE IN
ALT
FCN
MIC/LINE IN
4 2
3 1
68R
48
48
88.2
88.2
96
96
176.4
176.4
192
192
L1357
248 6
MONITOR
METER
1 2
1 2
RATE
OUT
HEADPHONES
21
POWER
OFF
1
Mic
Monitor Speakers
Apollo 8 Hardware Manual Interconnections 31
Typical Setup
This diagram illustrates an Apollo 8 setup that could be used to record two musicians
simultaneously. In this setup, only analog devices are connected; digital I/O is not used.
The example shows an electric guitar and electric bass connected to the Hi-Z inputs.
Microphones are connected to XLR inputs of channel 3 and 4, and a stereo keyboard is
connected to line inputs 5 and 6. Both headphone outputs are used during tracking and
the left/right monitor outputs are connected to a loudspeaker system for mixdown.
Key points for this example:
• Mic/Line switches for channels 3 and 4 are set to MIC
• Unique mixes can be crafted via Console’s CUE sends and routed to each headphone output for “more me” during tracking
Instrument 1
HI-Z 1 HI-Z 2
ADAT S/MUX
Thunderbolt
Mac
Instrument 2
PREAMP
INPUT
+48V
Ø LINK
75 Ω
TERM
PAD
WORD CLOCK
Keyboard
INPUT
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
MIC
LINE
Hi-Z
Hi-Z
WORD
CLOCK
S/PDIF
CLIP
CLIP
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
Typical Apollo connections
HOST
HOST
CLOCK
CLOCK
METER
METER
INT
INT
EXT
EXT
IN
IN
OUT
OUT
1 2
1 2
RATE
RATE
44.1
44.1
48
48
88.2
88.2
96
96
176.4
176.4
192
192
L1357
248 6
Monitor Speakers
C
C
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
7 5
LINE IN
OUT
HEADPHONES
Headphones 2
21
POWER
OFF
1
Headphones 1Stereo
MONITOR
METER
ALT
FCN
MIC/LINE IN
4 2
3 1
68R
MicMic
Apollo 8 Hardware Manual Interconnections 32
Advanced Setup
This diagram illustrates a more complex Apollo 8 setup that could be used for recording
an entire ensemble, utilizing both analog and digital I/O.
In addition to the connections in the previous example, four additional microphones
are connected to Universal Audio’s 4-710d Four-Channel Tone-Blending Mic Preamp
w/Dynamics. The 4-710d performs A/D conversion on these mics and the signals are
digitally routed into Apollo via the ADAT optical interface. Apollo 8 is the master clock
source, so the 4-710d is set to use external word clock (and a 75-ohm BNC word clock
cable is interconnected). ALT monitors are configured for comparing different speakers.
A stereo digital recorder is connected to the S/PDIF output, a tuner is connected to
analog line output 8, and a Thunderbolt hard drive is daisy-chained off Apollo 8.
Key points for this example:
• Mic/Line switch for channels 3 and 4 are set to MIC
• Four additional mic preamps from UA’s 4-710d are routed into Apollo 8 via ADAT
Lightpipe
• Apollo 8 is the master clock device; the 4-710d clock source is set to external word clock and the 4-710d Termination switch is engaged (alternately, the
4-710d could be used as the master clock by setting the 4-710d to internal
clock, setting Apollo to external ADAT clock, and eliminating the word clock cable)
Instrument 1
UA 4-710d
(ADAT out &
word clock in)
HI-Z 1 HI-Z 2
Thunderbolt
Mac
ADAT S/MUX
Instrument 2
PREAMP
Thunderbolt HD
INPUT
+48V
MicMicMic
75 Ω
TERM
Ø LINK
PAD
WORD CLOCK
Mic
INPUT
MIC
LINE
Hi-Z
Hi-Z
WORD
CLOCK
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
CLIP
CLIP
0
0
-3
-3
-6
-6
-9
-9
-12
-12
-15
-15
-18
-18
-21
-21
-27
-27
Tuner
S/PDIF
ALT Monitor
Speakers
HOST
HOST
CLOCK
CLOCK
INT
INT
EXT
EXT
METER
METER
IN
IN
OUT
OUT
1 2
1 2
RATE
RATE
44.1
44.1
-3
-3
48
48
-6
-6
-9
-9
88.2
88.2
-12
-12
96
96
-15
-15
-18
-18
176.4
176.4
-21
-21
192
192
-27
-27
Stereo
Keyboard
L1357
248 6
Monitor Speakers
C
C
0
0
7 5
LINE IN
Headphones 1
METER
ALT
FCN
Mic Mic
68R
MONITOR
HEADPHONES
MIC/LINE IN
4 2
3 1
OUT
Headphones 2
21
POWER
OFF
1
S/PDIF Recorder
Apollo 8 Hardware Manual Interconnections 33
Apollo Expanded: Multi-Unit Wiring
Apollo Expanded
Speakers
The diagram below illustrates how to interconnect multiple Apollo units and the host computer
via Thunderbolt.
Important: For complete details about system operation when multi-unit cascading, see
the Apollo Software Manual.
Thunderbolt
Mac
Multi-Unit Wiring
Thunderbolt Connections
CLOCK
WORD
75 OHM TERM
IN
MADI OUT MADI IN
POWER OUT
ADAT S/MUX
75 Ω
TERM
WORD CLOCK
WORD CLOCK
Expander Unit
OPTICAL IN
POWER
OFF ON
3 L
4 R
MIC/LINE 2
MIC/LINE 1
LINE OUT MONITOR
Cables Required
• One Thunderbolt cable for each Apollo unit
Note: All Apollo rack units require Thunderbolt connections (FireWire cannot be used).
ON
OFF
S/PDIF
AES/EBU OUT AES/EBU IN
PUSH
ALT Monitor
MON OUT (R) 2 MON OUT (L) 1
L1357
248 6
Monitor Speakers
7 5
LINE IN
LINE OUT 9-16
LINE OUT 1-8 LINE IN 1-8
4 2
68R
LINE IN 9-16
MIC/LINE IN
3 1
IMPORTANT: Connect speakers
and cue outputs to monitor unit only
Expander Unit
Monitor Unit
1
Apollo Expanded Wiring Notes
• A single Thunderbolt cable is required for all Apollo unit interconnections. Connect one
Thunderbolt cable to the host computer and one Thunderbolt cable between Apollo units.
• Thunderbolt 1 or 2 ports may be mixed and used for any/all connections.
• The computer and all Apollo units must be connected to the same Thunderbolt bus.
• Apollo device ordering and Thunderbolt ports used (second port on Apollo vs. second port
on computer, placement within daisy chain, etc) is not important.
• In this wiring example diagram, the Apollo 8 in the center is the designated monitor
(master) unit. Connect speakers (including ALT speakers) and any cue outputs to the
monitor unit only.
• Do not connect more than one Thunderbolt cable between the same two devices (the
Thunderbolt protocol is bidirectional).
• Do not interconnect any Word Clock, FireWire, ADAT, or MADI ports between any Apollo
units.
Apollo 8 Hardware Manual Interconnections 34
Specifications
All specifications are typical performance unless otherwise noted, tested under the following conditions: 48 kHz internal sample rate, 24-bit sample depth, 20 kHz measurement bandwidth, with balanced output.
SYSTEM
I/O Complement
Microphone Inputs Four
High-Impedence (Hi-Z) Instrument Inputs Two
Analog Line Inputs Eight
Analog Line Outputs Eight (ten including Monitor outputs)
Analog Monitor Outputs Two (one stereo pair)
Headphone Outputs Two stereo
ADAT Up to eight channels via dual I/O ports with S/MUX
S/PDIF One stereo input, one stereo output
Thunderbolt 2 ports Two (Thunderbolt 1 compatible)
Word Clock One input, one output
A/D – D/A Conversion
Supported Sample Rates (kHz) 44.1, 48, 88.2, 96, 176.4, 192
Bit Depth Per Sample 24
Simultaneous A/D conversion Eight channels
Simultaneous D/A conversion 14 channels
Analog Round-Trip Latency 1.1 milliseconds @ 96 kHz sample rate
Analog Round-Trip Latency with up to four serial
UAD plug-ins via Console application
1.1 milliseconds @ 96 kHz sample rate
(continued)
Apollo 8 Hardware Manual Specifications 35
ANALOG I/O
Frequency Response 20 Hz – 20 kHz, ±0.1 dB
Microphone Inputs 1 – 4
Connector Type XLR Female, pin 2 positive (Combo XLR/TRS)
Phantom Power +48V (switchable per mic input)
Dynamic Range 120 dB (A–weighting)
Signal-to-Noise Ratio 120 dB (A–weighting)
Total Harmonic Distortion + Noise –110 dBFS
Equivalent Input Noise –126 dB
Common-Mode Rejection Ratio (CMRR) 73 dB (10’ cable)
Default Input Impedance 5.4K Ohms (variable via Unison plug-ins)
Gain Range +10 dB to +65 dB
Pad Attenuation (switchable per input) 20 dB (variable via Unison plug-ins)
Maximum Input Level +25 dBu (minimum gain, pad engaged)
Hi-Z Inputs 1 – 2
Connector Type ¼” Female TS Unbalanced
Dynamic Range 118 dB (A–weighting)
Signal-to-Noise Ratio 118 dB (A–weighting)
Total Harmonic Distortion + Noise –101.5 dBFS
Input Impedance 1M Ohms (variable via Unison plug-ins)
Gain Range +10 dB to +65 dB
Maximum Input Level +12 dBu
Line Inputs 1 – 4
Connector Type ¼” Female TRS Balanced (Combo XLR/TRS)
Dynamic Range 120 dB (A–weighting)
Signal-to-Noise Ratio 120 dB (A–weighting)
Total Harmonic Distortion + Noise –110 dBFS
Common-Mode Rejection Ratio (CMRR) 60 dB (10’ cable)
Input Impedance 10K Ohms
Gain Range +10 dB to +65 dB (Line Input Gain = ON)
Reference Level +4 dBu (Line Input Gain = BYPASS)
Maximum Input Level +20.2 dBu
(continued)
Apollo 8 Hardware Manual Specifications 36
ANALOG I/O
(continued)
Line Inputs 5 – 8
Connector Type ¼” Female TRS Balanced
Dynamic Range 120 dB (A–weighting)
Signal-to-Noise Ratio 120 dB (A–weighting)
Total Harmonic Distortion + Noise –110 dBFS
Common-Mode Rejection Ratio (CMRR) 60 dB (10’ cable)
Input Impedance 10K Ohms
Gain (selectable per input) +4 dBu or –10 dBV
Maximum Input Level (+4 dBu setting) +20.2 dBu
Maximum Input Level (–10 dBV setting) +6.2 dBV (unbalanced)
Line Outputs 1 – 8
Connector Type ¼” Female TRS Balanced
Dynamic Range 121 dB (A–weighting)
Signal-to-Noise Ratio 121 dB (A–weighting)
Total Harmonic Distortion + Noise –110 dBFS
Stereo Level Balance ±0.05 dB
Output Impedance 100 Ohms
Maximum Output Level +20.2 dBu
Monitor Outputs Left & Right
Connector Type ¼” Female TRS Balanced
Dynamic Range 121 dB (A–weighting)
Signal-to-Noise Ratio 121 dB (A–weighting)
Total Harmonic Distortion + Noise –110 dBFS
Stereo Level Balance ±0.01 dB
Output Impedance 100 Ohms
Maximum Output Level +20.2 dBu
Stereo Headphone Outputs 1 – 2
Connector Type ¼” Female TRS Stereo
Dynamic Range 118 dB (A–weighting)
Signal-to-Noise Ratio 118 dB (A–weighting)
Total Harmonic Distortion + Noise –101 dBFS
Maximum Output Power 160 mW into 300 ohm load
(continued)
Apollo 8 Hardware Manual Specifications 37
DIGITAL I/O
S/PDIF
Connector Type Female Phono (RCA)
Format IEC958
Supported Sample Rates (kHz) 44.1, 48, 88.2, 96, 176.4, 192
ADAT
Connector Type Optical TOSLINK JIS F05
Format ADAT Digital Lightpipe with S/MUX
Supported Sample Rates (kHz) 44.1, 48, 88.2, 96, 176.4, 192
Channel Assignments @ 44.1 kHz, 48 kHz Port 1 = Channels 1 – 8, Port 2 = 1 – 8 (mirrored)
Channel Assignments @ 88.2 kHz, 96 kHz Port 1 = Channels 1 – 4, Port 2 = Channels 5 – 8
Channel Assignments @ 176.4 kHz, 192 kHz Port 1 = Channels 1 – 2, Port 2 = Channels 3 – 4
Word Clock
Connector Type BNC
Lock Range ±0.5% of any supported sample rate
Word Clock Input Termination 75 Ohms, switchable
Synchronization Sources
Internal, Word Clock, S/PDIF, ADAT
Electrical
Power Supply External AC to DC Power Supply, Level V compliant
AC Input Connector Type IEC Male
AC Requirements 100V – 240V AC, 50 – 60 Hz
DC Connector Type XLR 4-Pin Locking Male (Neutrik P/N NC4MDM3-H)
DC Requirements 12 VDC, ±5%
Maximum Power Consumption 50 Watts
Mechanical
Dimensions
Width 19”
Height 1.75” (1U rack space)
Depth, Chassis Only 12.125”
Depth, Including Knob & Jack Protrusions 13.5”
Shipping Box (Width x Depth x Height) 24” x 17” x 8”
Weight
Shipping Weight (with box & accessories) 18 pounds
Weight (bare unit) 9.1 pounds
Package Contents
Apollo 8 Audio Interface Unit (DUO or QUAD)
External Power Supply
AC Power Cable (IEC)
Set of (4) Rack-Mount Screws
Getting Started URL Card
Apollo 8 Hardware Manual Specifications 38
Block Diagram
Apollo 8 Hardware Block Diagram
INPUT CHANNELS 1 - 2
INPUT CHANNELS 3 - 4
S/PDIF
HI-Z IN
MIC IN
LINE IN
XLR FEMALE
1/4” TS
1/4” TRS
MIC IN
XLR FEMALE
LINE IN
1/4” TRS
WORD CLOCK I/O
INPUT CHANNELS 5 - 8
LINE IN
1/4” TRS
S/PDIF
THUNDERBOLT
2 PORTS
OUT
OR LINE
MONITOR
SELECT
+14dBu / +20dBu
MONITOR OUTPUTS
SELECT
MON / LINE
OUTPUT
VOLUME
OPTOOPTOOPTOOPTO
ADAT OUT
ADAT IN
RCA
OUT
IN
RCA
1/4” TRS
LINE OUTPUTS 1 - 8
PAD
SELECT
+4dBu / -10dBV
D/A
1/4” TRS
LINE OUT
D/A
Stereo Pairs
Pad Works on
PAD
ø
CONTROL
POLARITY
ON/OFF
LOW-CUT
HP OUT
1/4” TRS
HEADPHONES 1 & 2 L/R
DRAM
DRAM
DRAM
D/A
DSP
DSP
OUTPUT
VOLUME
SHARC®
DSP
SHARC®
SHARC®
SHARC®
MIXER
CLOCKING / SYNC
SYSTEM CONTROL
ø
CONTROL
POLARITY
ON/OFF
LOW-CUT
FRONT PANEL
DRAM
ARM®
DSP
PROCESSOR
2
TM
TBTB
TM
OPTION CARD
THUNDERBOLT
PCIe OPTION CARD SLOT
BNCBNC
ø
CONTROL
POLARITY
ON/OFF
LOW-CUT
75 Ω
WC TERM ON/OFF
A/D
PGA
BYPASS
10 – 65 dB
INPUT GAIN
SELECT
MIC-LINE/HI-Z
SELECT
MIC/LINE
IN/OUT
MIC PAD
+48V
+48V ON/OFF
AMPLIFIER
PGA = PROGRAMMABLE-GAIN
IF PLUG INSERTED IN HI-Z JACK
PGA
(MIC)
Unison™
SWITCHING
IMPEDANCE
PAD
HI-Z AUTOMATICALLY SELECTED
(HI-Z)
Unison™
SWITCHING
IMPEDANCE
A/D
PGA
BYPASS
PGA
10 – 65 dB
INPUT GAIN
(MIC)
SELECT
MIC/LINE
IN/OUT
MIC PAD
+48V
+48V ON/OFF
Unison™
SWITCHING
IMPEDANCE
PAD
A/D
V09
IN/OUT
LINE IN PAD
PAD
Apollo 8 Hardware Manual Block Diagram 39
Troubleshooting
If Apollo 8 isn’t behaving as expected, here are some common troubleshooting items
to confirm. If you are still experiencing issues after performing these checks, contact
Technical Support.
SYMPTOM ITEMS TO CHECK
Unit won’t power on • Confirm power supply connections at power supply input and back of unit
• Confirm Power switch is not in “OFF” position
• Confirm AC power is available at wall socket by plugging in a different device
No monitor output • Confirm connections, power, and volume of monitoring system
• Confirm monitor knob is turned up
• Confirm monitor outputs are not muted (push monitor knob)
• Confirm monitor LEDs are active (check signal flows)
Can’t hear channels 1 – 4 • Confirm preamp gain is turned up for the channel(s)
Can't hear mic or line
input(s)
Can't hear Hi-Z input(s) • Confirm volume on connected device is turned up
Can’t hear mic input(s) • Confirm +48V phantom power is enabled (if required by microphone)
Preamp controls have no
effect on channel
Can only adjust input
channels 1 – 4
Audio glitches and/or
dropouts during playback
Undesirable echo/phasing • Confirm input monitoring is not enabled in both Console and DAW
HOST indicator is unlit or
red
Static and/or white noise
is heard when nothing is
plugged in
• Confirm mic/line switch setting is correct for the channel
• Confirm nothing is plugged into the channel’s Hi-Z input
• Confirm Hi-Z input cable is 1/4” TS only (not TRS)
• Confirm desired channel is selected for control (push PREAMP knob to select)
• Preamp controls are available for channels 1 – 4 only
• Signal levels for all other inputs, including digital inputs, are adjusted at the device
connected to those inputs
• Increase audio buffer size setting
• Confirm clocking setups (check cable connections and confirm all device clocks are
synchronized to one master clock device)
• Confirm Thunderbolt connections
• Confirm Apollo software is installed
• Power Apollo off then on, and restart computer
• Reinstall Apollo software
• Try a Thunderbolt cable
• Mute or lower preamp gain to minimum on all unused preamp channels (mic
preamps can emit noise even when nothing is plugged in)
• Some UAD plug-ins model the noise characteristics of the original equipment.
Defeat the noise model in the UAD plug-in GUI, or mute the channel containing the
plug-in to temporarily mute the noise
Various LEDs inside the unit
are blinking
Apollo 8 is behaving
unexpectedly
• This is normal operational behavior that can be safely ignored
• As a last resort, perform a hardware reset on the unit by following these steps:
1. Power off Apollo
2. Press and hold the PREAMP, LOW CUT, and POLARITY controls
3. Power on Apollo 8 while continuing to hold all three controls
4. After all front panel LEDs flash rapidly (after several seconds), release the
controls
Apollo 8 Hardware Manual Troubleshooting 40
Notices
Important Safety Information
Before using this unit, be sure to carefully read the applicable items of these operating
instructions and the safety suggestions. Afterwards, keep them handy for future
reference. Take special care to follow the warnings indicated on the unit, as well as in
the operating instructions.
Water and Moisture – Do not use the unit near any source of water or in excessively moist
environments.
Object and Liquid Entry – Care should be taken so that objects do not fall, and liquids
are not spilled, into the enclosure through openings.
Ventilation – When installing the unit in a rack or any other location, be sure there is
adequate ventilation. Improper ventilation will cause overheating, and can damage the
unit.
Heat – The unit should be situated away from heat sources, or other equipment that
produces excessive heat.
Power Sources – The unit should be connected to a power supply only of the type
described in the operating instructions, or as marked on the unit.
Power Cord Protection – AC power supply cords should be routed so that they are not
likely to be walked on or pinched by items placed upon or against them. Pay particular
attention to cords at plugs, convenience receptacles, and the point where they exit from
the unit. Never take hold of the plug or cord if your hand is wet. Always grasp the plug
body when connecting or disconnecting it.
Cleaning – Follow these general rules when cleaning the outside of the unit:
a. Turn the power off and unplug the unit
b. Gently wipe with a clean lint-free cloth
c. Do not use aerosol sprays, solvents, or abrasives
Nonuse Periods – The AC power supply cord of the unit should be unplugged from the
AC outlet when left unused for a long period of time.
Damage Requiring Service – The unit should be serviced by a qualified service personnel
when:
a. The AC power supply unit has been damaged; or
b. Objects have fallen or liquid has been spilled into the unit; or
c. The unit has been exposed to rain; or
d. The unit does not operate normally or exhibits a marked change in performance; or
e. The unit has been dropped, or the enclosure damaged.
Servicing – The user should not attempt to service the unit beyond that described in
the operating instructions. All other servicing should be referred to qualified service
personnel.
Apollo 8 Hardware Manual Notices 41
Warranty
Universal Audio provides a warranty on all hardware products. To learn more, please visit
www.uaudio.com/support/warranty.html or contact Technical Support. This limited
warranty gives you specific legal rights. You may also have other rights which vary by
state or country.
Maintenance
Apollo 8 does not contain a fuse or any other user-replaceable parts. The unit is internally calibrated at the factory. No internal user adjustments are available.
Repair Service
If you are having trouble with Apollo 8, the first check all system setups, connections,
software installations, and the Troubleshooting chart. If that doesn’t help, contact
Technical Support. To learn more about repair service, please visit:
• www.uaudio.com/support/rma-faq.html
FCC Compliance
Federal Communications Commission
United States Class A Manual Statement
Note: This equipment has been tested and found to comply with the limits for a Class A
digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates,uses, and can radiated radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications, Operation of this
equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
Any modifications to the unit, unless expressly approved by Universal Audio, could void
the User’s authority to operate the equipment.
Apollo 8 Hardware Manual Notices 42
Disclaimer
The information contained in this manual is subject to change without notice. Universal
Audio, Inc. makes no warranties of any kind with regard to this manual, including, but
not limited to, the implied warranties of merchantability and fitness for a particular
purpose. Universal Audio, Inc. shall not be liable for errors contained herein or direct,
indirect, special, incidental, or consequential damages in connection with the furnishing,
performance, or use of this material.
End User License Agreement
Your rights to the Software are governed by the accompanying End User License Agreement, a copy of which can be found at: www.uaudio.com/eula
Trademarks
Universal Audio, the Universal Audio “diamond” logo, Apollo, Apollo Twin, Apollo
16, Unison technology, UAD, UAD Series, UAD-1, UAD-2, UAD-2 Satellite, Powered
Plug-Ins, 1176LN, 1176SE, Teletronix, LA-2A, LA-3A, LA-610, LA-610MkII, 2-1176,
2-610, 6176, 710 Twin-Finity, 2192, 4-710d, Cambridge EQ, DreamVerb, Plate
140, Precision Limiter, RealVerb Pro, Precision Buss Compressor, Precision De-Esser,
Precision Maximizer, and “Analog Ears | Digital Minds,” are among the trademarks, trade
names, and service marks owned by UA that may appear on the Site, many of which are
registered in the United States and other countries. This is not a comprehensive list of
all UA trademarks. All UA trademarks inure to the benefit of UA. Other trademarks and
trade names that may appear on the Site and which are not owned by UA are owned by
the respective owners.
Copyright
Copyright ©2015 Universal Audio, Inc. All rights reserved.
This manual and any associated software, artwork, product designs, and design concepts
are subject to copyright protection. No part of this document may be reproduced, in any
form, without prior written permission of Universal Audio, Inc.
Apollo 8 Hardware Manual Notices 43
Universal Audio, Inc.
4585 Scotts Valley Drive
Scotts Valley, CA 95066 USA
Customer Service & Technical Support:
USA Toll-Free: +1-877-698-2834
International: +1-831-440-1176
www.uaudio.com
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