Krell Industries 222 User Manual

EVOLUTION

THE LEADER IN AUDIO ENGINEERING

EVOLUTION 222

STEREO PREAMPLIFIER

OWNER’S REFERENCE

Evolution 222 Stereo Preamplifier

Go to website

Owner’s Reference, v06.0

TEL [phone]

Krell Industries, Inc.
45 Connair Road
Orange, CT 06477-3650 USA

FAX [phone]

E-MAIL [e-mail]

WEBSITE http://www.krellonline.com

This product complies with the EMC directive (89/336/EEC) and the low-voltage directive
(73/23/EEC).

IMPORTANT SAFETY INSTRUCTIONS

1. Read Instructions.

2. Keep these Instructions.

3. Heed all Warnings.

4. Follow all Instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

7. Do not install near any heat sources such as radiators, heat registers, stoves, or other appa-

ratus (including amplifiers) that produce heat.

8. Unplug this apparatus during lightning storms or when unused for long periods of time.

9. Refer all servicing to qualified service personnel. Servicing is required when the apparatus

has been damaged in any way, such as a power-supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally, or has been dropped.

10. The Evolution 222 preamplifier must be placed on a firm, level surface where it is not exposed

to dripping or splashing.

11. The ventilation grids on the top of the Evolution 222 preamplifier and the space underneath the

Evolution 222 preamplifier must be unobstructed at all times during operation. Do not place
flammable material above or beneath the preamplifier.

12. Before making connections to the Evolution 222 preamplifier, ensure that the power is off and

other components are in mute or stand-by mode. Make sure all cable terminations are of the
highest quality, free from frayed ends, short circuits, or cold solder joints.

13. Do not connect an RS-232 cable to the phono power port. Output from the phono power port

can seriously damage your computer.

14. Do not connect the cable from a Krell KPE phono stage to the RS-232 port.

15. THERE ARE NO USER SERVICEABLE PARTS INSIDE AN EVOLUTION 222 PREAMPLIFIER.

Please contact Krell if you have questions not addressed in this guide.

This product is manufactured in the United States of America. Krell®is a registered trademark of Krell Industries, Inc., and is restricted for use by
Krell Industries, Inc., its subsidiaries, and authorized agents. Evolution Bias
based on U.S. Patent No. 5,331,291. CAN Link
Inc. All other trademarks are registered to their respective companies.

© 2006 by Krell Industries, Inc. All rights reserved P/N 309158-W

™, CAST™, Evolution CAST™, and Krell Current Mode™ are trademarks of Krell Industries,

™ is a trademark of Krell Industries, Inc. and is a Krell technology

Contents

List of Illustrations, page 4

A Letter from Dan D’Agostino, page 5

SECTION ONE: Evolution 222 Features and Technology, page 6

Features, Revolutionary Krell CAST Technology,
Definition of Terms

SECTION TWO: Unpacking and Placement, page 11

Opening the Evolution 222 Shipping Carton

SECTION THREE: Quick Start, page 13

Connecting the Evolution 222 to Your System,
Operating the Evolution 222

SECTION FOUR: Anatomy of the Evolution 222, page 15

Front Panel Description, Remote Control Description,
Battery Installation, and Back Panel Description

SECTION FIVE: Connecting the Evolution 222 to Your System, page 26

Input and Output Connections, Connection Steps

SECTION SIX: Evolution 222 Operation, page 28

On/Off and Stand-by Operation

SECTION SEVEN: Customizing the Evolution 222, page 29

Navigation Conventions, Menu Functions

SECTION EIGHT: Troubleshooting System Noise, page 43

WARRANTY, page 44

RETURN AUTHORIZATION PROCEDURE, page 46

SPECIFICATIONS, page 47

3

List of Illustrations

Figure 1, page 15

Evolution 222 Preamplifier Front Panel

Figure 2, page 19

Evolution 222 Remote Control

Figure 3, page 22

Evolution 222 Preamplifier Back Panel

4

A Letter from Dan D’Agostino

Dear Audio Enthusiast,

Thank you for your purchase of the Krell Evolution 222 preamplifier.

The preamplifier plays a vital role in audio playback by mediating the line-level out­put of a wide variety of source components in preparation for the amplifier’s input.
At no other point in the reproduction process is music so vulnerable to change, as
the signal level is small, and susceptible to noise and distortion.

Having always valued the role of the preamplifier in fine audio systems, I take pre­amplifier design very seriously. I realize that, no matter how impressive an amplifi­er’s performance; it can be no better than that of the preamplifier driving it.

My new Evolution 222 preamplifier employs balanced Krell Current Mode gain
stages from input to output, and Current Audio Signal Transmission (CAST)
receivers and transmitters. Utilizing these powerful technologies, the Evolution 222
conveys the complete range of timbre and dynamics that comprise the foundation
musical performance. Typical of my latest preamplifier designs, the Evolution 222
preamplifier includes a thoughtful suite of menu options, and can be customized
for the greatest ease of operation.

I hope that you enjoy your new Evolution 222 preamplifier.

Sincerely,

Daniel D’Agostino

Chief Executive Officer

5

SECTION ONE

Evolution 222 Features and Technology

This section describes the innovative features and technology of the Evolution 222
preamplifier, and defines CAST and other key terms used in this reference.

Features

The Evolution 222 has an open loop bandwidth that exceeds 1 MHz and a
balanced Krell Current Mode design, terminating in Evolution CAST ™. CAST
inputs and outputs drive a newly designed current mode balanced input stage.
Class A, balanced circuitry is used throughout the preamplifier. Cascoded, current
mirror input and output stages utilize an LED voltage reference to achieve an
exceptionally linear state of operation. There are 310 transistors utilized in each
channel, and all are Class A biased. A robust power supply is on board for excep­tional audio performance.

6

Revolutionary Krell CAST Technology

Current Audio Signal Transmission, termed CAST, is a revolutionary method of
connecting analog audio components for unparalleled sonic performance.
Innovative engineering combines the new Krell CAST circuitry with existing Krell
Current Mode technology to create entire CAST systems that reproduce music
with incredible range, tonality, and precision.

The Voltage Signal Transmission
and the Traditional Audio System

Traditionally, signal is transmitted in the voltage domain between two components.
In an audio system, each component is a discrete entity with unique characteris­tics that act upon the musical signal independently. Each component is unaware
of the other components in the system. The cables that connect the components
also have their own electrical characteristics, which affect the sonic presentation
of the entire system. CAST transmission unifies individual components and inter­connects into an electrically-linked whole. The original signal remains unaltered
from source to speaker.

CAST Basics

Here is how a CAST audio system works. Internally, each CAST source transfers,
or amplifies, current using Krell Current Mode circuitry. This current signal is then
output using CAST circuitry. When the signal is received by a CAST input, Krell
Current Mode circuitry again takes over until the signal reaches the loudspeaker.
By maintaining the musical signal in the current domain from beginning to end, an
entire CAST system behaves as if it is one component. With CAST, circuit board
properties and signal transmission aberrations between components are eliminat­ed. Cable impedances and their effects on the transmitted signal are non-existent.

How CAST and Krell Current Mode Interact

While CAST is a new method of transferring the musical signal between compo­nents, its origin stems from Krell Current Mode, the technology developed to
transfer the musical signal within a component. CAST combined with Krell Current
Mode takes circuitry signal transmission to the next evolutionary level. In essence,

7

continued

(SECTION ONE: Evolution 222 Features and Technology continued)

Krell Current Mode maintains the integrity of the signal within the component and
CAST preserves the transmitted signal between components. Together, CAST and
Krell Current Mode technologies unify separate Krell components into a

global circuit.

Krell Current Mode technology enjoys bandwidth increases up to an
order of magnitude greater than their voltage based counterparts. This dramatic
increase in circuit bandwidth delivers near perfection in the audible band that typi­cally suffers from phase distortions in voltage circuits.

CAST Cable Construction

A CAST system uses cables manufactured by Krell and other manufacturers spe­cially licensed by Krell. Thin and flexible CAST cables are constructed with the
same build quality as other Krell components and are aesthetically matched to the
components that Krell manufactures. An all-metal body and locking connectors
with gold contacts are part of the standard no-compromise specification devel­oped for every CAST cable made.

Evolution CAST

single

By employing radical current mirror circuitry, the Evolution 222 components ele­vate the CAST technology to another level. This advanced use of the technology
increases the linearity, transient speed, and bandwidth of the Evolution compo­nents while reducing the distortion by an order of magnitude.

The Best Musical Performance

When you operate a CAST system, you will hear significant improvements in every
performance area: speed, precision, dynamic range, depth and width of the sound
stage, transient impact, tonal balance, harmonic distortion, and more. The goal for
CAST is the same company goal used for all Krell products. Krell strives for the
delivery of the best performance of a musical event for you, using the full expres­sion of technology to date.

8

Definition of Terms

The following are definitions of key terms used in this owner’s reference:

Inputs and Outputs

Balanced

A symmetrical input or output circuit that has equal impedance from both input
terminals to a common ground reference point. The industry standard for profes­sional and sound recording installations, balanced connections have 6 dB more
gain than single-ended connections and allow the use of long interconnect cables.
Balanced connections are completely immune to induced noise from the system
or the environment.

CAST and Evolution CAST

Krell Current Audio Signal Transmission, or CAST, is a proprietary Krell circuit tech­nology for connecting analog components, transmitting the audio waveform
between components in the current domain rather than in the voltage domain. The
speed and bandwidth provided by Krell CAST and its circuitry update, Evolution
CAST, yield accurate, realistic music reproduction, enabling connected compo­nents to perform as if they are all part of a single circuit.

Single-ended

A two-wire input or output circuit. Single-ended connections are not recommend­ed for connections requiring long cable runs. Use care when using single-ended
connections, because the ground connection is made last and broken first. Turn
the system off/on prior to making or breaking single-ended connections.

Operation

Off

When the stand-by/power LED is not illuminated, the preamplifier is off.

Stand-by

A low-power-consumption status that keeps the audio and regulator circuits at
idle. The stand-by/power LED is illuminated in red, when the preamplifier is in
stand-by mode. Krell recommends leaving the preamplifier in stand-by mode when
it is not playing music.

Operation

When the standby/power LED is illuminated in blue, the preamplifier is in opera­tional mode and ready to play music.

9

continued

(SECTION ONE: Definition of Terms continued)

Technology

Krell Current Mode

A proprietary Krell circuit topology in which the audio gain stages of a component
operate in the current rather than voltage domain. This unique technology provides
the component with exceptional speed, and a wide bandwidth.

10

SECTIONTWO

Unpacking and Placement

This section describes the procedures for safely unpacking and placing your
Evolution 222 preamplifier. The Evolution 222 preamplifier and accessories are
shipped in 1 carton.

Opening the Evolution 222 Shipping Carton

The Evolution 222 shipping carton measures 22.3 in. (56.6 cm) wide by 23.5 in.
(59.7 cm) high by 16.2 in. (41.1 cm) deep.

Preamplifier Chassis. This measures 17.3 in. (43.8 cm) wide by 3.8 in. (9.7 cm)

high by 18.3 in. (46.4 cm) deep, and weighs 22 lbs. (10 kg).

To Remove the Preamplifier from the Shipping Carton

1. Open the shipping carton and remove the top layer of foam. The carton con-

tains these items:

1 Preamplifier chassis
1 IEC Connector (AC Power) cord
1 Remote control
2 AAA-size 1.5 Volt batteries for the remote
1 T-10 Torx wrench for the remote control
1 Owner’s Reference

2. Carefully remove the preamplifier and accessories from the box.

3. Place the preamplifier in a safe location, and remove the protective plastic

wrapping.

11

continued

(SECTION TWO: Unpacking and Placement continued)

Placement

Before you install an Evolution 222 preamplifier into your system, please follow the
guidelines in this section to select a location for your component. This will facili­tate a clean, trouble-free installation.

The Evolution 222 preamplifier does not require a special rack or cabinet for instal­lation. The preamplifier chassis measures 17.3 in. (43.8 cm) wide, 3.8 in. (9.7 cm)
high, and 18.3 in. (46.4 cm) deep.

The Evolution 222 preamplifier requires at least two inches of clearance on each
side, and at least two inches of clearance above the component to provide ade­quate ventilation. Installation inside cabinetry may require additional ventilation.

AC Power Guidelines

The Evolution 222 preamplifier has superb regulation and does not require a dedi­cated AC circuit. Avoid connections through extension cords or multiple AC
adapters. High quality 15 amp AC strips are acceptable.

12

SECTION THREE

Quick Start

To access the full array of available functions for the Evolution 222, please read
this entire owner’s reference manual. The abbreviated routine in this Quick Start
section will allow you to connect and operate the Evolution 222 quickly and enjoy
its basic functions.

The front and rear panels are shown in the diagrams on pages 15 and 22. Each
button or feature is labeled with a callout number, and these numbers are shown
in parentheses in the sections below. (In the following instructions, the word “but­ton” refers to a front panel operation, and “key” refers to a remote control opera­tion.)

Connecting the Evolution 222 to Your System

Position the preamplifier where you intend to use it in your system. Do not
move the chassis after it is connected.

1. Neatly arrange and organize wiring to and from the preamplifier and all com-

ponents. Separate the AC wires from any audio cables to prevent hum or other
unwanted noise from being introduced into the system.

2. Connect the outputs of your source equipment to the appropriate CAST (18),

balanced (15), single-ended (16), or tape inputs (17) on the Evolution 222.

3. Connect the main outputs (20) on the Evolution 222 to your amplifier’s inputs.

4. Connect the supplied AC power cord to the IEC power cord receptacle (26) of

the preamplifier.

5. Plug the other end of the AC power cord into AC power. The display (3) scrolls

through
nates red, indicating that the Evolution 222 is in stand-by mode. When the
scrolling stops, the Evolution 222 is ready to be powered on.

Note

Use only the power cord provided with the preamplifier to make the connection to AC
power. Operation with a power cord other than the one supplied by Krell could induce
noise, limit current, or otherwise impair the ability of the preamplifier to perform optimally.

EVOLUTION 222 SOFTWARE VERSION, and the stand-by/power LED (7) illumi-

13

continued

(SECTION THREE: Quick Start)

Operating the Evolution 222

After the Evolution 222 is connected to your system and to AC power, and the
front panel display has stopped scrolling, begin operation:

1. Press the power button (1) on the front panel, or the remote control power key.

The standby/power LED turns blue. The display shows the factory default

S-1, and level: -INF. The Evolution 222 is now in the operational mode.

input:

2. With the preamplifier output muted, or the volume fully attenuated, select a

source manually using the front panel input select buttons (8, 9, or 10) or the
remote input select keys. Start playing the source. Use the level control knob
(14) or the remote level keys to set the volume to a comfortable level.

3. To return the preamplifier to the stand-by mode, press the power button (1) or

remote power key.
Krell recommends leaving the Evolution 222 in the stand-by mode when it is

not playing music.

14

SECTION FOUR

Anatomy of the Evolution 222

This section describes the Evolution 222 Preamplifier functions.

Figure 1 Evolution 222 Front Panel

Power

Remote
Functions

Display
Navigate/

Customize
Input

Selectors

Mute
Phase
Level

1 Power Button
7 Stand-by/Power LED
2 Infrared Emitter
4 Infrared Sensor
3 Front Panel Display
5 Menu Button
6 Enter Button
8 Single-ended Input

Selection Buttons

9 Balanced Input

Selection Buttons

10 CAST Input Selection Buttons
11 Tape Button and LED
12 Mute Button and LED
13 Phase Button and LED
14 Level Control Knob

15

continued

(SECTION FOUR: Anatomy of an Evolution 222 continued)

Front Panel Description

See Figure 1 on the previous page

The Evolution 222 preamplifier front panel functions are described below:

Chassis

Preamplifier Chassis

The preamplifier front panel provides power on, input and zone selection, level
control, menu functions, and status display.

Power

1 Power Button or Key

Use this button or key to switch the Evolution 222 between the stand-by and
operational modes.

7 Stand-by/Power LED

The preamplifier LED illuminates red (stand-by) when the Evolution 222 is
plugged into a standard AC wall receptacle. It illuminates blue (operational
mode) when the power button (1) is pressed while the Evolution 222 is in
stand-by mode.

Remote Functions on the Front Panel

2 Infrared Emitter

The stand-by/Power LED (7) flashes when the Evolution 222 sends signals via
this infrared emitter to a programmable remote control, such as the Universal
Krell Touch Screen Remote.

4 Infrared Sensor

The infrared sensor receives commands from the Evolution 222 remote control.
For proper remote control operation, make sure the infrared sensor is not cov­ered or obstructed.

See IR Out Control, on page 36.

16

Display

3 Front Panel Display

The front panel display provides preamplifier channel status messages, includ­ing input status, tape output status, volume level, balance offset, and menu
selections.

Navigate/Customize

5 Menu Button or Key

Use this button or key to access the menu functions of the Evolution 222. For
more information, see

6 Enter Button or Key

Use this button or key to configure the menu functions of the Evolution 222.

For more information, see Customizing the Evolution 222, on page 29.

Preamplifier Functions

8, 9, 10 Input Select Buttons or Keys

Use these buttons to select the corresponding rear panel input that is connect­ed to a CAST (C-1, C-2), balanced (B-1, B-2), or single-ended (S-1, S-2, S-3)
analog source. The front panel display shows the selected input and volume
level.

Customizing the Evolution 222, on page 29.

11 Tape Button and LED, or Key

Use this button or key to select the tape input that is connected to an analog
tape source. The red tape LED illuminates when the tape input is selected. The
front panel display (3) shows:

12 Mute Button and LED, or Key

Use this button or key to mute the preamplifier output. To unmute, press the
mute button again. The red mute LED illuminates when mute is selected.

customize mute operation see

13 Phase Button and LED, or Key

Use this button or key to invert the absolute polarity of the main output by 180
degrees. The red phase LED illuminates, when phase is selected.

TAPE and the main volume level.

Mute, on page 37.

17

To

continued

(SECTION FOUR: Anatomy of an Evolution 222 continued)

Level Control

14 Level Control Knob or Level Keys

Use this knob or keys to increase or decrease system volume level or, with the
balance key (C), to adjust balance. The level control knob or keys also select
menu options that customize the Evolution 222.

Evolution 222,

on page 29.

See Customizing the

18

Figure 2 Evolution 222 Remote Control

Power
Navigate/

Customize
Input

Selectors

Mute
Phase
Level
Amplifier

Functions
Balance

CD and DVD
Functions

1 Power Key
5 Menu Key
6 Enter Key
8 Single-ended Input

Selection Keys

9 Balanced Input

Selection Keys

10 CAST Input Selection

Keys

11 Tape Selection Key
12 Mute Key
13 Phase Key
14 Level Keys

A Amp Pwr Key

B Amp Sel Key
C Bal(ance) Keys
D Transport Keys

E Menu Key

F Direction Keys
G Select Key
H CD Key

I DVD Key

J Title Key

19

continued

(SECTION FOUR: Anatomy of an Evolution 222 continued)

Remote Control Description

See Figure 2 on the previous page

The Evolution 222 remote provides the same power, preamplifier, level control, and
navigate/customize functions as the preamplifier’s front panel. In addition, the
remote has CD and DVD functions, and menu configuration functions.

Keys Labled 1 to 14

These remote keys have the same function (and callout number) as the corre­sponding front panel controls described in the preceding pages.

Keys Labled A to J

These remote keys have functions that are unique to the remote control, and
are described below.

Battery Installation and Removal

The remote control uses 2 AAA-size 1.5 Volt batteries. Batteries are included with
the shipment. To install the batteries:

1. Remove the remote control backplate, using the supplied T-10 Torx wrench.

2. Install the batteries, following the battery position diagram on the plastic battery

receptacle.

3. Replace and secure the backplate.

Notes

Replace batteries when remote control function becomes intermittent.

Remove batteries if the remote control is not used for a long period of time. Battery leakage
can damage the remote control.

Amplifier Functions

A Amp Pwr Key

Use this key to activate Krell amplifiers connected to your system.

B Sel (Meter Select) Key

Use this key to select the meter range of the power meter scale on the front of
a Krell Evolution One power amplifier.

Owner’s Reference,

Balance Functions

Please refer to the Evolution One

for more information.

C Bal(ance) Keys

Use these with the level keys (14) to adjust the left and right channel balance.

20

Compact Disc and DVD Functions

The compact disc and DVD dual-purpose keys of the remote control are function­al with all Krell compact disc and DVD players.

D Transport Keys:

Pause Key

Use this key to temporarily suspend playing the current compact disc track.
Press pause again or press the play key, to resume playing the track at the
point when pause was engaged.

Play Key

Use this key to begin compact disc playback.

Stop Key

Use this key to end compact disc playback.

Track Forward and Back Keys

Use these keys to select and begin playing the track that follows or precedes
the current track.

Search Forward and Back Keys

Press and hold these keys to scroll forward or backward through the current
track.

E Menu Key

Use this key to enter CD or DVD player menus.

F Direction Keys

Use these keys to navigate CD and DVD menus.

G Select Key

Use this keys to make selections from CD and DVD menus.

H CD Key

Use this to activate CD functions.

I DVD Key

Use this to activate DVD functions.

J Title Key

Use this with CD or DVD player menus.

Note

For information on track programming functions, refer to the owner's reference of your
Krell compact disc player

.

21

continued

(SECTION FOUR: Anatomy of an Evolution 222 continued)

Figure 3 Evolution 222 Back Panel

Inputs

Outputs

Configurations
Remote

Phono
Power

15 Balanced Inputs: B-1, B-2
16 Single-ended Inputs: S-1, S-2, S-3
17 Tape Input
18 CAST Inputs: C-1, C-2
19 Tape Output
20 Main Outputs:

Single-ended Main Output
Balanced Main Output

CAST Outputs

21 CAN Link In/Out
22 RS-232 Port
23 RC-5 In
24 12 VDC In/Out
25 Phono Power Port
26 IEC Power Cord Receptacle

22

Back Panel Description

See Figure 3 on the previous page

The preamplifier back panel provides all input and output connections, remote
control inputs and outputs, and the power connection. Back panel features and
their descriptions follow.

Inputs

15 Balanced Inputs: B-1, B-2

These are balanced analog source inputs with XLR connectors.

16 Single-ended Inputs: S-1, S-2, S-3

These are single-ended analog source inputs with RCA connectors.

17 Tape Input

This is a single-ended tape input, for use with a tape source.

18 C-1 and C-2 CAST Inputs

These are CAST inputs with 4-pin bayonet connectors, for use with Krell
CAST-equipped input devices.

Outputs

19 Tape Output

This single-ended analog output is used for recording the selected input
source.

20 Main Outputs

The Evolution 222 is equipped with one single-ended output with RCA con­nectors, one balanced output with XLR connectors, and two CAST preamplifi­er outputs with 4-pin bayonet connectors, for use with Krell CAST-equipped
amplifiers.

Configurations

21 CAN Link

These RJ-45 link connectors are connected in parallel. They are used to con­nect the Evolution 222 preamplifier to other CAN Link-enabled Krell products.

23

continued

(SECTION FOUR: Anatomy of an Evolution 222 continued)

Remote Connections on the Back Panel

22 RS-232

The RS-232 port receives messages from a computer-based control system,
providing integrated control of all preamplifier functions. The RS-232 input
uses a 9-pin D-subminiature connector.

erence, entitled

RS-232 Port: Sending Commands and Interpreting Data,

for more information.

23 RC-5 In

The RC-5 remote connector is used with a third party remote control system
that provides RC-5 (IR) data with the carrier intact, via a wired connection. A
stereo tip, ring, sleeve 1/8-inch mini connector is used in the following configu­ration: Tip = RC-5 data, Ring = +5 V, Sleeve = GND.

24 12 VDC In/Out (12 V Trigger)

The preamplifier has 2 outputs that send, and one input that receives 12 VDC
power on/off (12 V trigger) signals to and from other Krell components and
other devices that incorporate a 12 V trigger. This allows you to turn other
components on or off, or to and from stand-by, through the remote control.
When the Evolution 222 is switched to operational mode and is connected to
other components through the 12 V trigger, it sends a signal that will switch
other components, allowing whole systems or parts of systems to be easily
coordinated.

Trigger,

For more information on customizing the 12 V trigger, see Input

on page 35. Mono 1/8-inch mini connectors are used in the following

configuration: Tip = +12 V, Sleeve = GND.

See the Evolution 222 developer's ref-

Notes

When the Evolution 222 is in the operational mode, the 12 V trigger provides 12 Volts
of DC output. When the component is in the stand-by mode or off, the DC output is
0 Volts.

A minimum of 30 mA is required to operate the 12 V trigger.

Consult the owner's reference of the components used in a custom installation to take
full advantage of the remote capabilities of the Evolution 222.

24

Phono Stage Connector

25 Phono Power Port

This port is used for connecting the preamplifier to a Krell KPE phono stage.

Power

26 IEC Power Cord Receptacle

The IEC power connector is for use with the provided IEC standard 15 amp
AC power cord.

25

SECTION FIVE

Connecting the Evolution 222
to Your System

This section describes Evolution 222 preamplifier connections.

Input and Output Connections

Krell recommends using its proprietary Krell CAST system for unparalleled sonic
performance for connections between the Evolution 222 preamplifier and other
CAST-equipped components. Krell CAST uses flexible interconnecting cables that
can be drawn through tight spaces and concealed.

The Evolution 222 also offers balanced operation. The circuitry and connections
associated with balanced operation not only can minimize sonic loss but also are
immune to induced noise, especially for installations using long cables.

XLR Pin Configuration

Pin 1 Ground

O

Pin 2 Non-inverting (0
Pin 3 Inverting (180

)

O

)

Inputs and outputs are located on the Evolution 222 back panel. Maintain the
correct left/right orientation, when hooking up your system.

26

Connection Steps

Position the preamplifier where you intend to use it in your system.

The following steps describe how to connect an Evolution 222 preamplifier to your
system:

1. Neatly arrange and organize wiring to and from the Evolution 222 preamplifier

and all components. Separate AC wires from audio cables to prevent hum or
other unwanted noise from being introduced into the system.

2. Connect the outputs of your source equipment to the appropriate CAST (18),

balanced (15), single-ended (16), or tape inputs (17) on the Evolution 222.

3. Connect the appropriate main outputs (20) on the Evolution 222 to your ampli-

fier.

4. Connect the supplied AC power cord to the IEC power cord receptacle (26).

5. Plug the AC power cord into AC power. The front panel display (3) scrolls

through
indicating that the Evolution 222 preamplifier is in stand-by mode. The scrolling
stops when the Evolution 222 is ready to be powered on.

EVOLUTION 2 SOFTWARE VERSION, and the red stand-by LED illuminates (7),

Note

Use only the power cord provided with the preamplifier to make the connection to AC
power. Operation with a power cord other than the one supplied by Krell could induce
noise, limit current, or otherwise impair the ability of the preamplifier to perform opti­mally.

27

SECTION SIX

Evolution 222 Operation

The Evolution 222 preamplifier is easy to operate. Instructions follow for on/off and
stand-by operation.

IMPORTANT

Always mute or fully attenuate the preamplifier level when switching sources.
Do not change input connections to the amplifier when the amplifier is on.
Use care when setting high playback levels. Always lower the volume level at the first

sign of loudspeaker distress.

On/Off and Stand-by Operation

When powering on any system, turn on amplifiers last. When powering down, turn
off amplifiers first.

After the Evolution 222 is connected to your system and to AC power, and the
front panel display (3) has stopped scrolling, begin operation:

1. Press the power button on the preamplifier front panel or the pwr key (1) on

the remote control. The stand-by/power LED (7) turns blue, and the front panel
display reads

S-1, and level: -INF. The Evolution 222 is now in the operational mode.

input:

INITIALIZING. The front panel display shows the factory default

2. With the preamplifier output muted or the volume fully attenuated, select a

source manually using the input select buttons or the remote keys (8, 9, 10,

11). Start playing the source. Use the level control knob or level keys (14) to set
the volume to a comfortable listening level.

3. To return to the stand-by mode, press the power button or pwr key.

Krell recommends leaving the Evolution 222 in the stand-by mode when it is not
playing music. Turn the Evolution 222 off when the system is not being used for
an extended period of time.

To Turn Off The System

1. Place the amplifiers in the stand-by mode.

2. Press the front panel power button or the remote control pwr key (3) to switch

the Evolution 222 to the stand-by mode.

3. Turn off the amplifiers using the back panel power switch or by disconnecting

them from AC power.

4. Turn off the Evolution 222 by unplugging the AC power cord from AC power.

28

SECTION SEVEN

Customizing the Evolution 222

The Evolution 222 preamplifier easy-to-use menu allows you to configure the fol­lowing functions. You can also use the menu to review version information about
the software, hardware, and firmware installed in the Evolution 222:

AC Mains,

page 30 Input Phase, page 35 Recall, page 39

Balance (channel) page 31 Input Trigger, page 35 RS-232 Control, page 40
Balance (input trim), page 31 IR Out Control, page 36 Save, page 40
Display, page 32 Link Control, page 37 Theater Mode, page 41
Info, page 33 Mute, page 37 Volume Display, page 42
Input Level Trim, page 34 Output Trigger, page 38
Input Name, page 34 RC-5 Control, page 39

Navigation Conventions

Navigating the Evolution 222 menu is straightforward and consistent throughout,
using four functions and the menu option

5 Menu Button or Key

To enter the menu, press the menu button on the preamplifier front panel or the
menu key on the remote control. Once you are in the menu, you can press the
menu button or key to exit the menu.

14 Volume Knob or Level Keys

Use the volume knob on the preamplifier front panel or the up and down keys on
the remote control to scroll forward and backward through the menu hierarchy.
Each menu list is a continuous loop.

BACK.

6 Enter Button or Key

Press the enter button on the preamplifier front panel or the enter key on the
remote control to select a function or a configuration option, and to confirm a
selection.

3 Front Panel Display

The display shows the active function and configurable options.

BACK

Select back to scroll backwards up the menu hierarchy, or to exit a menu option
without confirming it.

The first list you see in the menu is the list of configurable functions. Select a con­figurable function to view a submenu: the list of options that configure the func­tion. You can configure some options as well, using a second submenu.

29

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

Menu Functions

AC Mains

This function enables you to operate the Evolution 222 from a switched AC outlet.
If AC Mains is set to
by. Thereafter, you may switch the preamplifier to and from stand-by, using the
power button or pwr key (1). The options are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on the

remote control

3. Use the level control knob or the up and down keys to select the desired

option:

OFF or ON.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

AC MAINS.

ON, the preamplifier turns on immediately, by-passing stand-

. The front panel display (3) shows the default mode: OFF.

OFF, ON.

AC MAINS.

OFF

The Evolution 222 switches to stand-by mode, when it detects AC power.

ON

The Evolution 222 turns on immediately, bypassing the stand-by mode, when it
detects AC power.

30

Balance (channel)

This function enables you to adjust the balance between the left and right output
channels. The options are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired bal-

ance option from 0 to +5 dB, in .5 dB increments, left or right.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

BALANCE.

Balance (input trim)

This function enables you to adjust the balance between the left and right chan­nels for each input. The options are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

CENTER, L .5-5 dB <, R .5-5 dB >.

BALANCE.

. The front panel display (3) shows the default mode: CENTER.

CENTER, L .5-5 dB <, R .5-5 dB >.

INPUT BALANCE TRIM.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The front panel display (3) shows the default mode: B-1.

3. Use the level control knob or the up and down keys to select the desired input:

B-1, B-2, S-1, S-2, S-3, C-1, C-2, or TAPE.

4. Press the enter button or key. The display (3) shows the default mode: CENTER.

5. Use the level control knob or the up and down keys to select the desired bal-

ance option from 0 to +5 dB, in .5 dB increments, left or right.

6. Press the enter button or key to confirm the selection. The front panel display

reads:

INPUT BALANCE TRIM.

31

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

Display

This function enables you to turn on the front panel display (3) all the time, or turn
it off after a time out. The options are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys on the remote control (14) to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The front panel display (3) reads: MODE.

3. Press the enter button or key (6) again. The front panel display shows the

default mode:

ON.

4. Use the level control knob or the up and down keys to select the desired

option:

ON or TIMED.

5. Press the enter button or key to confirm the selection. The front panel display

reads:

MODE.

6. Use the level control knob or the up and down keys to select: BRIGHTNESS.

ON, TIMED.

DISPLAY.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

7. Press the enter button or key. The front panel display shows the default mode:

HIGH.

8. Use the level control knob or the up and down keys to select the desired

brightness:

OFF, LOW (25%), MED (50%), or HIGH (100%).

9. Press the enter button or key to confirm the selection. The front panel display

reads:

ON

The front panel display is always on.

TIMED

The front panel display times out after 5 seconds.

BRIGHTNESS

Controls the brightness of the display. When the brightness setting is OFF, the
display is at 50% of brightness when in menu mode, and turns completely off
when you leave the menu mode.

BRIGHTNESS.

32

Info

This function enables you to access information about the preamplifier software,
EEPROM, and PC Boards. The PC Boards are listed in the left margin, on this
page.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

INFO.

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control
ber.

. The front panel display (3) shows the software version num-

3. Rotate the level control knob clockwise or press the up key. The front panel

display shows the EEPROM version number.

4. Rotate the level control knob clockwise or press the up key again. The front

panel display shows the PC board version number.

PC Boards

CONTROL
DISPLAY
ENCODER
MAIN L

MAIN R
POWER CONN
POWER SUPP
DIG CONN

5. Press the enter button or key. Use the level control knob or the up and down

keys to scroll through the version numbers of PC boards, from the PC Boards
listed at left.

EEPROM

Electrically erasable programmable read-only memory. An erasable memory chip
used in the Evolution 222 to store menu selection information.

33

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

Input Level Trim

This function enables you to select an input offset for a particular input. The
options are:

+/-6 dB, in 1 dB increments.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys (14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The front panel display (3) shows the default mode: B-1.

3. Use the level control knob or the up and down keys to select the desired input:

B-1, B-2, S-1, S-2, S-3, C-1, C-2, or TAPE.

4. Press the enter button or key. The front panel display shows the default mode:

0 dB.

5. Use the level control knob or the up and down keys to select the desired trim

option:

+/-6 dB, in 1 dB increments.

6. Press the enter button or key to confirm the selection. The front panel display

shows the selected input.

INPUT LEVEL TRIM.

Input Name Options

AUX, AUX1, AUX2, AUX3
B-1, B-2, B-3, BYPC-1
C-2, C-3, CABLE, CD, CD1,
CD2, CD-R, COMP

DAC, DAT, DCC, DISC, DISC 1,
DISC 2, DISC 3, DSS, DVD,
DVD1, DVD2, DVD3, DVD-A

EQ, GAME, HI-8
LD, LD1, LD2, LINE 1, LINE 2,
LINE 3, LINE
MDISC, MIXER, MON

PHONO, PHON1, PHON2,
PROC
S-1, S-2, S-3, S-4, SACD, SAT,
SRC1, SRC2, SRC3, SURR,
S-VID

TAPE1, TAPE2, TAPE3, TAPE,
TEST, THR, TUNER, TUNR1,
TUNR2, TV,
VCR, VCR1, VCR2, VCR3,
VDISC, VIDEO, VID1, VID2,
VID3
8MM, 8TRK

Input Name

This function enables you to select an input name for each input. The input name
options are listed in the left margin, on this page.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired input:

B-1, B-2, S-1, S-2, S-3, C-1, C-2, or TAPE.

4. Press the enter button or key. The front panel display shows no characters.

5. Use the level control knob or the up and down keys to select the desired input

name, from the input name options listed at left.

6. Press the enter button or key to confirm the selection and return to the input

list, in Step 3. The front panel display shows the input name.

To select input names for other inputs, repeat Steps 3 and 4.

INPUT NAME.

. The front panel display (3) shows the default mode: B-1.

34

Input Phase

This function enables you to invert the absolute polarity of the selected input 180
degrees. The selections are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys (14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired input

from the list:

4. Press the enter button or key. The front panel display shows the default mode:

NORMAL.

5. Use the level control knob or the up and down keys to select: NORMAL or INVERT.

6. Press the enter button or key to confirm the selection. The front panel display

shows the selected input.

NORMAL

The phase of the selected input is unaffected.

NORMAL, INVERT.

INPUT PHASE.

. The front panel display (3) shows the default mode: B-1.

B-1, B-2, S-1, S-2, S-3, C-1, C-2, or TAPE.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

INVERT

The phase of the selected input is inverted 180 degrees.

Input Trigger

This function enables you to configure the input trigger. The options are: OFF,

NORMAL, THEATER.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired

option:

4. Press the enter button or key to confirm the selection. The front panel display

reads:

INPUT TRIGGER.

. The front panel display (3) shows the default mode: NORMAL.

OFF, NORMAL, or THEATER.

INPUT TRIGGER.

35

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

(Input Trigger continued)

OFF

The Evolution 222 does not respond to 12 V input trigger commands.

NORMAL

The Evolution 222 responds to 12 V input trigger commands.

THEATER

The Evolution 222 responds to 12 V input trigger commands, and the theater
mode enabled input is selected automatically.

IR Out Control

This function enables you to access Evolution 222 IR commands and program a
learning remote control.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

MAIN.

. The front panel display (3) shows the default mode: B-1

See Theater Mode, on page 41.

IR OUT.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

3. Use the level control knob or the up and down keys to select the desired IR

command from the list.

4. Press the enter button or key to send the command out via the preamplifier

front panel IR transmitter (2). The stand-by LED (7) on the preamplifier flashes,
indicating that the command has been sent.

5. Repeat Steps 2-4 for each of the commands you wish to transmit.

6. Press the enter button or key to confirm the selection. The front panel display

reads:

For a listing of IR codes, see the Evolution 222 developer’s reference entitled

RS-232 Port: Sending Commands and Interpreting Data.

IR OUT.

36

Link Control (CAN Link)

This function enables you to link and unlink CAN Link-enabled Krell products. The
options are:

LINKED, UNLINKED.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys (14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired

option:

LINKED, or UNLINKED.

4. Press the enter button or key to confirm the selection. The front panel reads:

LINKED.

LINKED

When preamplifier channels are linked, power, volume, balance, phase, tape,
mute, and input selections are automatically communicated between linked pre­amplifier channels. All other settings remain local

UNLINKED

When a preamplifier channel is unlinked, it does not respond to commands from
any other linked preamplifier channels. After the preamplifier channel is unlinked,
settings can be changed, independent of other preamplifier channels.

LINK CONTROL.

. The front panel display (3) shows the default mode: LINKED.

.

Mute

This function enables you to control the mute mode. Options are: FULL, -20 dB, BACK.
Enter the menu, then:

1. Use the level control knob, or the up and down keys (14) to select: MUTE.

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The front panel display (3) shows the default mode: FULL.

3. Use the level control knob, or the up and down keys to select the desired

option:

FULL or -20 dB.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

FULL

The output of the Evolution 222 is completely silenced.

-20dB

The output of the Evolution 222 is reduced by 20 dB and may still be audible.

MUTE.

37

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

Output Trigger

This function enables you to turn the two 12 Volt output triggers (24) on or off, or
configure them with independent delays of up to 20 seconds. The options are:

OFF, DELAY.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The display (3) shows the default mode: TRIGGER 1.

3. Press the enter button or key again. The display shows the default mode: OFF.

4. Use the level control knob or up and down keys to select: OFF, ON, or DELAY.

5. Select DELAY. You are prompted to enter a delay time of 0-20 seconds.

6. Enter the delay time.

7. Press enter to confirm the selection. The display reads: DELAY.

8. Use the level control knob or up and down keys to scroll to: BACK.

ON,

OUTPUT TRIGGER.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

9. Press the enter button or key to return to: TRIGGER 1.

10. Use the level control knob or the up and down keys to scroll to: TRIGGER 2.

11. Repeat Steps 3-7 to set Trigger 2.

ON

The 12 Volt trigger output is enabled at power on for the selected trigger (Trigger 1
or 2).

OFF

The 12 Volt trigger output is disabled at power on for the selected trigger (Trigger
1 or 2).

DELAY

The 12 volt trigger output is enabled at power on for the selected trigger (Trigger 1
or 2), and the delayed for a period of time (0-20 seconds).

38

RC-5 Control

This function enables you to change the link transmit status of the Evolution 222.
The options are:

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

TRANSMIT

3. Use the level control knob or the up and down keys to select the desired

option:

4. Press the enter button or key to confirm the selection. The front panel display

reads:

Recall

This function enables you to access factory default settings or your own saved
settings. The options are:

Enter the menu, then:

LINK TRANSMIT, LINK RECEIVE.

RC-5 CONTROL.

. The front panel display (3) shows the default mode: LINK

.

LINK TRANSMIT or LINK RECEIVE.

RC-5 CONTROL.

FACTORY, SAVED.

1. Use the level control knob on the preamplifier channel front panel or up and

down keys (14) on the remote control to select:

RECALL.

2. Press the enter button on the preamplifier channel front panel or the enter key

(6) on the remote control. The front panel display (3) shows the default mode:

FACTORY.

3. Use the level control knob or the up and down keys to select the desired

option:

FACTORY, or SAVED.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

FACTORY

Recalls the factory settings.

SAVED

Recalls settings previously stored in memory using the SAVE function. See also

Save, on the next page.

RECALL.

39

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

RS-232 Control

This function enables you to change the link transmit status of the Evolution 222.
The options are

LINK TRANSMIT, LINK RECEIVE.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

TRANSMIT

.

. The front panel display (3) shows the default mode: LINK

3. Use the level control knob or the up and down keys to select the desired

option:

LINK TRANSMIT, or LINK RECEIVE.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

RS-232 CONTROL.

Save

This function enables you to save a copy of the current settings. The options are:

GO, BACK.

RS-232 CONTROL.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

SAVE.

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control. The front panel display (3) shows the default mode:

GO.

3. Press the enter button or key to save the settings The front panel display

reads:

GO

Saves a copy of current settings to memory, overwriting previously saved settings.

SAVE.

40

Theater Mode

This function enables you to select theater mode volume for a particular input.
Use this function when connecting the output of a preamp/processor to the
Evolution 222 for home theater applications. Configuring an input for theater mode
sets that input for unity gain, and suspends the level control of the Evolution 222.
Volume adjustments are then made through the preamp/processor connected to
the input configured for theater mode on the Evolution 222. The options are:

OFF.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or the up and down

keys (14) on the remote control to select

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

3. Use the level control knob or the up and down keys to select the desired input:

B-1, B-2, S-1, S-2, S-3, C-1, C-2, or TAPE.

4. Press the enter button or key. The front panel display shows the default mode:

OFF.

5. Use the level control knob or the up or down keys to select ON or OFF.

ON,

THEATER.

. The front panel display (3) shows the default input: B-1.

6. Press the enter button or key to confirm the selection and return to the select-

ed input.

ON

The selected input is set to THEATER and the volume control for the theater input is
disengaged on the Evolution 222.

OFF

The selected input is configured normally and the volume control for the normal
input is engaged on the Evolution 222.

Note

Only one input on the Evolution 222 can be in theater mode at a time. When theater mode
is set for an input, theater mode is cleared automatically from other inputs.

The Evolution 222 selects the theater input automatically upon power on, if the input trigger
is configured for THEATER. See Input Trigger, on pages 35-36.

41

continued

(SECTION SEVEN: Customizing the Evolution 222 continued)

Volume Display

This function enables you to select the numeric mode for the volume display, dis­playing values from softest to loudest: 0 to 151. Alternatively, you can select the
dB mode for the volume display, displaying values from softest to loudest: -inf to
+12 dB. The options are:

NUMERIC, dB.

Enter the menu, then:

1. Use the level control knob on the preamplifier front panel or up and down keys

(14) on the remote control to select:

2. Press the enter button on the preamplifier front panel or the enter key (6) on

the remote control

. The front panel display (3) shows the default mode: dB.

3. Use the level control knob or the up and down keys to select the desired

option:

NUMERIC or dB.

4. Press the enter button or key to confirm the selection. The front panel display

reads:

VOLUME DISPLAY.

VOLUME DISPLAY.

5 Menu Button or Key

Enter or exit the menu.

14 Volume Knob

or Level Keys

Navigate the menu hierarchy;
review functions and configu­ration options.

6 Enter Button or Key

Select a configuration option;
confirm a selection.

BACK

Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.

42

SECTION EIGHT

Troubleshooting System Noise

When you mix and match high-performance audio components, each with its own
ground potential, a low frequency hum may occur in one or both loudspeakers.

If this happens when you place the Evolution 222 preamplifier into your system,
follow these simple troubleshooting steps.

1. Check that all input and output connections are of sound construction.

2. With the preamplifier off, remove the interconnect cables, then turn the pream-

plifier on. If the hum disappears, turn the preamplifier off and reinsert one of
the interconnect cables. Turn the preamplifier back on. Repeat this process for
each cable.

3. If the hum reappears with one or both interconnect cables reinserted, the cable

needs to be replaced.

4. If the interconnect cables are sound, you may be experiencing a ground loop.

Please contact your authorized Krell dealer, distributor, or Krell for suggestions
on how to eliminate the ground loop.

43

Warranty

Krell products have a limited warranty. Amplifiers, preamplifiers, preamp/processors,
and receivers carry a limited warranty of five years for parts and labor on circuitry.
Loudspeakers carry a limited warranty of five years for parts and labor. CD and
DVD players carry a limited warranty of five years for parts and labor on circuitry,
and three years for parts and labor on mechanical parts.

Should the product fail to perform at any time during the warranty, Krell will repair it
at no cost to the owner, except as set forth in this warranty.

This warranty does not apply to damage caused by acts of God or nature.
This warranty shall be in lieu of any other warranty, expressed or implied, including,

but not limited to, any implied warranty of merchantability or fitness for a particular
purpose. There are no warranties which exceed beyond those described in this
document, if the product does not perform as warranted herein, the owner’s sole
remedy shall be repair. In no event will Krell be liable for incidental or consequential
damages arising from purchase, use, or inability to use the product, even if Krell
has been advised of the possibility of such damages.

IMPORTANT

The user is responsible for notifying his or her Krell dealer, distributor, or Krell that a
tube preamplifier will be used with the Full Power Balanced Series amplifiers, so that
the Krell dealer, distributor, or Krell can activate the coupling capacitors. If the user
does not notify the Krell dealer, distributor, or Krell and uses a tube preamplifier
without the Full Power Balanced Series amplifier’s coupling capacitor engaged, Krell
reserves the right to refuse warranty related service due to DC-related damage.

Proof of purchase in the form of a bill of sale or receipted invoice substantiating
that the product is within the warranty period must be presented to obtain warranty
service. The warranty begins on the date of the original retail purchase, as noted on
the bill of sale or receipted invoice from an authorized Krell dealer or distributor.
Previously owned equipment, when re-purchased from an authorized Krell dealer or
distributor, has the balance of the original warranty, based on the original date of
manufacture.

The warranty for a Krell product is valid only in the country to which it was originally
shipped, through the authorized Krell distributor for that country, and at the factory.
There may be restrictions on or changes to Krell’s warranty because of regulations
within a specific country. Please check with your distributor for a complete under­standing of the warranty in your country.

44

continued

If the product is serviced by a distributor who did not import the unit, there may be
a charge for service, even if the product is within the warranty period.

Freight to the factory is your responsibility. Return freight within the United States
(U.S.A.) is included in the warranty. If you have purchased your Krell product out­side the U.S.A. and wish to have it serviced at the factory, all freight and associated
charges to the factory are your responsibility. Krell will pay return freight to the
U.S.A.-based freight forwarder of your choice. Freight and other charges to ship the
product from the freight forwarder to you are also your responsibility.

Krell is not responsible for any damage incurred in transit. Krell will file claims for
damages as necessary for a product damaged in transit to the factory. You are
responsible for filing claims for shipping damages during the return shipment.

Krell does not supply replacement parts and/or products to the owner of the prod­uct. Replacement parts and/or products will be furnished only to the distributor
performing service on this product on an exchange basis only; any parts and/or
products returned to Krell for exchange become the property of Krell.

No expressed or implied warranty is made for any Krell product damaged by acci­dent, abuse, misuse, natural or personal disaster, or unauthorized modification.

Any unauthorized voltage conversion, disassembly, component replacement,
perforation of chassis, updates, or modifications performed to the product
will void the warranty.

The operating voltage of the product is determined by the factory and can only be
changed by an authorized Krell distributor or at the factory. The voltage for this
product in the U.S.A. cannot be changed until six months from the original pur­chase date.

In the event that Krell receives a product for warranty service that has been modi­fied in any way without Krell authorization, all warranties on that product will be
void. The product will be returned to original factory layout specifications at the
owner’s expense before it is repaired. All repairs required after the product has
been returned to original factory specifications will be charged to the customer, at
current parts and labor rates.

All operational features, functions, and specifications and policies are subject to
change without notification.

To register your product for warranty benefits, please complete and return the
Warranty Registration Card enclosed in the shipping box within 15 days of pur­chase. Thank you.

45

Return Authorization Procedure

If you believe there is a problem with your component, please contact your dealer,
distributor, or the Krell factory to discuss the problem before you return the com­ponent for repair. To expedite service, you may wish to complete and e-mail the
Service Request Form in the Service Section of our website at:

http://www.krellonline.com

To contact the Krell Service Department

TEL [phone], Monday-Friday

9:00 AM to 5:00 PM EST

FAX [phone]
E-MAIL [e-mail]
WEBSITE http://www.krellonline.com

Evolution 222

PRODUCT MODEL NUMBER SERIAL NUMBER

To return a product to Krell, please follow this procedure so that we may
serve you better.

1. Obtain a Return Authorization Number (R/A number) and shipping address

from the Krell Service Department.

2. Insure and accept all liability for loss or damage to the product during ship

ment to the Krell factory and ensure all freight (shipping) charges are prepaid.

The product may also be hand delivered if arrangements with the Service
Department have been made in advance. Proof of purchase will be required for
warranty validation at the time of hand delivery.

IMPORTANT

Use the original packaging to ensure the safe transit of the product to the factory,
dealer, or distributor. Krell may, at its discretion, return a product in new packaging
and bill the owner for such packaging if the product received by Krell was boxed in
nonstandard packaging or if the original packaging was so damaged that it was
unusable. If Krell determines that new packaging is required, the owner will be noti­fied before the product is returned.

To purchase additional packaging, please contact your authorized Krell dealer, dis­tributor, or the Krell Service Department for assistance.

46

Specifications

Inputs

2 pr. CAST via 4-pin bayonet connectors
2 pr. balanced via XLR connectors
3 pr. single-ended via RCA connectors

Tape input

1 pr. single-ended via RCA connector

Main outputs

2 pr. CAST via 4-pin bayonet connectors
1 pr. balanced via XLR connector
1 pr. single-ended via RCA connector

Tape outputs

1 pr. single-ended via RCA connector,

buffered

Control inputs

1 RS-232 input via a 9-pin D-subminiature

connector

1 remote IR detector input via

a 3-conductor 3.5 mm connector

1 12 VDC trigger input via

a 2-conductor 3.5 mm connector

1 preamplifier link via an RJ-45 connector

Control outputs

2 individually programmable 12 VDC

trigger outputs via 2-conductor 3.5 mm
connectors (500 milliamps maximum
per output)

1 preamplifier link via an RJ-45 connector

Power output

1 phono power output (±20 VDC) for KPE

via a 9-pin D-subminiature connector

Input impedance

CAST: 45 Ohms
Balanced: 95 k Ohms
Single-ended: 47.5 k Ohms

Output impedance

CAST: >1 M Ohms
Balanced: 50 Ohms
Single-ended: 25 Ohms

Gain

12 dB (CAST or balanced output)
6 dB (single-ended output)

Volume control

Balanced, current-mode,
16-bit, discrete R-2R ladder

Input overload

CAST: 14 mA RMS
Balanced: 14 V RMS
Single-ended: 7 V RMS

Output overload

CAST: 16 mA RMS
Balanced: 16 V RMS
Single-ended: 8 V RMS

Frequency response

20 Hz to 20 kHz ± 0.02 dB

0.1 Hz to 1.5 MHz +0, -3 dB

Total harmonic distortion plus noise

Balanced Output:
<0.004%, 20 Hz to 20 kHz, 4 V RMS or
4 mA RMS

Signal-to-noise ratio

4 V RMS balanced or 4 mA RMS CAST output

Wideband, unweighted: >99 dB
“A” weighted: >108 dB

Power consumption

Standby: 60 W
Power on: 65 W
Power on, with KPE: 75 W

Dimensions

17.3 in.W x 3.8 in. H x 18.3 in. D

43.8 cm W x 9.7 cm H x 46.4 cm D

Weight

Shipped: 37 lbs., 16.7 kg
Preamplifier only: 22 lbs., 10 kg

Note

All operational features, functions, specifi­cations, and policies are subject to change
without notification.

47

EVOLUTION 222

STEREO PREAMPLIFIER

OWNER’S REFERENCE

V06.0

KRELL INDUSTRIES, INC.

45 CONNAIR ROAD

ORANGE, CT 06477-3650 USA

TEL: [phone] • FAX: [phone]

E-MAIL: [e-mail]

http://www.krellonline.com