EVOLUTION
EVOLUTION
STEREO
222
PREAMPLIFIER
OWNER’S
REFERENCE
THE LEADER IN AUDIO ENGINEERING
Evolution 222 Stereo Preamplifier
Owner’s Reference, v06.0
TEL 203-298-4000
Krell Industries, Inc.
FAX 203-891-2028
45 Connair Road
E-MAIL sales@krellonline.com
Orange, CT 06477-3650 USA
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 apparatus (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™ is a trademark of Krell Industries, Inc. and is a Krell technology
based on U.S. Patent No. 5,331,291. CAN Link™, CAST™, Evolution CAST™, and Krell Current Mode™ are trademarks of Krell Industries,
Inc. All other trademarks are registered to their respective companies.
© 2006 by Krell Industries, Inc. All rights reserved
P/N 309158-F
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 single
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
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
TWO
SECTION
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 contains 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 components. 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 EVOLUTION 222 SOFTWARE VERSION, and the stand-by/power LED (7) illuminates 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.
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
input: S-1, and level: -INF. The Evolution 222 is now in the operational mode.
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
1
7
2
4
3
5
6
8
9
Mute
Phase
Level
10
11
12
13
14
Power Button
Stand-by/Power LED
Infrared Emitter
Infrared Sensor
Front Panel Display
Menu Button
Enter Button
Single-ended Input
Selection Buttons
Balanced Input
Selection Buttons
CAST Input Selection Buttons
Tape Button and LED
Mute Button and LED
Phase Button and LED
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. See IR Out Control, on page 36.
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.
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 Customizing the Evolution 222, on page 29.
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.
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: TAPE and the main volume level.
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. To
customize mute operation see Mute, on page 37.
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.
17
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. See Customizing the
Evolution 222, on page 29.
18
Figure 2 Evolution 222 Remote Control
Power
Navigate/
Customize
Input
Selectors
1
5
6
8
9
10
Mute
Phase
Level
Amplifier
Functions
Balance
CD and DVD
Functions
11
12
13
14
A
B
C
D
E
F
G
H
I
J
Power Key
Menu Key
Enter Key
Single-ended Input
Selection Keys
Balanced Input
Selection Keys
CAST Input Selection
Keys
Tape Selection Key
Mute Key
Phase Key
Level Keys
Amp Pwr Key
Amp Sel Key
Bal(ance) Keys
Transport Keys
Menu Key
Direction Keys
Select Key
CD Key
DVD Key
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. Please refer to the Evolution One
Owner’s Reference, for more information.
Balance Functions
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
16
17
18
19
20
21
22
23
24
25
26
Balanced Inputs: B-1, B-2
Single-ended Inputs: S-1, S-2, S-3
Tape Input
CAST Inputs: C-1, C-2
Tape Output
Main Outputs:
Single-ended Main Output
Balanced Main Output
CAST Outputs
CAN Link In/Out
RS-232 Port
RC-5 In
12 VDC In/Out
Phono Power Port
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. See the Evolution 222 developer's reference, 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. For more information on customizing the 12 V trigger, see Input
Trigger, on page 35. Mono 1/8-inch mini connectors are used in the following
configuration: Tip = +12 V, Sleeve = GND.
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
Pin 2
Pin 3
Ground
Non-inverting (0 )
Inverting (180 )
O
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 amplifier.
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 EVOLUTION 2 SOFTWARE VERSION, and the red stand-by LED illuminates (7),
indicating that the Evolution 222 preamplifier is in stand-by mode. The scrolling
stops when 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.
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 INITIALIZING. The front panel display shows the factory default
input: S-1, and level: -INF. The Evolution 222 is now in the operational mode.
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
Balance (channel) page 31
Balance (input trim), page 31
Display, page 32
Info, page 33
Input Level Trim, page 34
Input Name, page 34
Input Phase, page 35
Input Trigger, page 35
IR Out Control, page 36
Link Control, page 37
Mute, page 37
Output Trigger, page 38
RC-5 Control, page 39
Recall, page 39
RS-232 Control, page 40
Save, page 40
Theater Mode, page 41
Volume Display, page 42
Navigation Conventions
Navigating the Evolution 222 menu is straightforward and consistent throughout,
using four functions and the menu option BACK.
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.
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 ON, the preamplifier turns on immediately, by-passing standby. Thereafter, you may switch the preamplifier to and from stand-by, using the
power button or pwr key (1). The options are: OFF, ON.
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: AC MAINS.
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: OFF.
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.
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: CENTER, L .5-5 dB <, R .5-5 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: BALANCE.
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: CENTER.
3. Use the level control knob or the up and down keys to select the desired balance 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: CENTER, L .5-5 dB <, R .5-5 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: INPUT BALANCE TRIM.
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 bal5 Menu Button or Key
Enter or exit the menu.
14 Volume Knob
or Level Keys
Navigate the menu hierarchy;
review functions and configuration options.
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.
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.
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: ON, TIMED.
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: DISPLAY.
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.
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: BRIGHTNESS.
ON
The front panel display is always on.
TIMED
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.
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.
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.
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. The front panel display (3) shows the software version number.
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
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.
MAIN L
MAIN R
EEPROM
POWER CONN
Electrically erasable programmable read-only memory. An erasable memory chip
used in the Evolution 222 to store menu selection information.
POWER SUPP
DIG CONN
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: INPUT LEVEL TRIM.
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 Name
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,
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: INPUT NAME.
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.
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,
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.
VID3
8MM, 8TRK
To select input names for other inputs, repeat Steps 3 and 4.
34
Input Phase
This function enables you to invert the absolute polarity of the selected input 180
degrees. The selections are: NORMAL, INVERT.
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: INPUT PHASE.
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
from the list: 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:
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.
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
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.
keys on the remote control to select: INPUT TRIGGER.
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: NORMAL.
3. Use the level control knob or the up and down keys to select the desired
option: OFF, NORMAL, or THEATER.
4. Press the enter button or key to confirm the selection. The front panel display
reads: INPUT TRIGGER.
BACK
Scroll backwards through the
menu hierarchy; exit a menu
option without confirming it.
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. See Theater Mode, on page 41.
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: IR OUT.
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
MAIN.
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: 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.
For a listing of IR codes, see the Evolution 222 developer’s reference entitled
RS-232 Port: Sending Commands and Interpreting Data.
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.
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: LINK CONTROL.
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: LINKED.
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.
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: MUTE.
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.
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: ON,
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: OUTPUT TRIGGER.
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.
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).
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.
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).
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.
38
RC-5 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: RC-5 CONTROL.
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: LINK
TRANSMIT.
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: RC-5 CONTROL.
Recall
This function enables you to access factory default settings or your own saved
settings. The options are: FACTORY, SAVED.
Enter the menu, then:
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: RECALL.
FACTORY
Recalls the factory settings.
SAVED
Recalls settings previously stored in memory using the SAVE function. See also
Save, on the next page.
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: RS-232 CONTROL.
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: LINK
TRANSMIT.
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.
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: SAVE.
GO
5 Menu Button or Key
Enter or exit the menu.
Saves a copy of current settings to memory, overwriting previously saved settings.
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.
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: ON,
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 THEATER.
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 input: 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:
OFF.
5. Use the level control knob or the up or down keys to select ON or OFF.
6. Press the enter button or key to confirm the selection and return to the selected 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: VOLUME DISPLAY.
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.
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 preamplifier 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
203-298-4020, Monday-Friday
9:00 AM to 5:00 PM EST
FAX
203-795-2287
E-MAIL
service@krellonline.com
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
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
Input impedance
CAST: 45 Ohms
Balanced: 95 k Ohms
Single-ended: 47.5 k Ohms
Note
All operational features, functions, specifications, and policies are subject to change
without notification.
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)
47
EVOLUTION
STEREO
222
PREAMPLIFIER
OWNER’S
REFERENCE
V06.0
KRELL
45
INDUSTRIES,
CONNAIR
ORANGE,
TEL:
CT
203-298-4000
E-MAIL:
INC.
ROAD
06477-3650
•
FA X :
USA
203-891-2028
sales@krellonline.com
h t t p : / / w w w. k r e l l o n l i n e . c o m