Krell Industries Stereo Amplifier KAV400xi User Manual

KAV400xi  
Remote Control  
THE LEADER IN AUDIO ENGINEERING  
Integrated Amplifier  
Instructions for Use  
Owner’s Reference  
 
Contents  
Page  
INTRODUCTION  
DEFINITION OF TERMS  
UNPACKING  
1
2
4
PLACEMENT  
5
5
5
AC Power Guidelines  
Power Cord  
FRONT PANEL / REMOTE CONTROL DESCRIPTION  
7
REMOTE CONTROL ONLY  
Battery Installation and Removal  
Remote Control Only Functions  
9
9
9
BACK PANEL DESCRIPTION  
12  
CONNECTING THE KAV400xi TO YOUR SYSTEM  
Connection Steps  
14  
14  
OPERATING YOUR KAV400xi  
Amplifier Operation  
15  
15  
16  
Tape Input and Output  
OPTIONAL CONFIGURATIONS  
Configuring the KAV400xi for Theater Throughput  
Preamplifier Output  
17  
17  
18  
HOW TO TROUBLESHOOT SYSTEM NOISE  
QUESTIONS AND ANSWERS  
WARRANTY  
19  
20  
21  
22  
23  
RETURN AUTHORIZATION PROCEDURE  
SPECIFICATIONS  
Krell KAV400xi  
iii  
 
Illustrations  
Page  
FIGURE 1 The KAV400xi Front Panel  
FIGURE 2 The KAV400xi Remote Control  
FIGURE 3 The KAV400xi Back Panel  
6
6
11  
iv  
Krell KAV400xi  
 
Introduction  
Thank you for your purchase of the Krell KAV400xi Remote  
Control Integrated Amplifier. This fully integrated amplifier and pre-  
amplifier has a fully balanced signal path from input to output and  
employs a wide bandwidth design with low negative feedback for  
sonic accuracy throughout the frequency spectrum. All circuits up  
to the driver stage are pure Class A.  
Krell’s new surface mount technology (SMT) means that the  
KAV400xi is an integrated amplifier with big power—200 Watts  
per channel—that does not require big space. SMT allows individ-  
ual circuit elements to be placed very close together. This shortens  
signal paths and allows circuit elements to operate at the same  
temperature, resulting in more accurate signal transfer and  
enhanced reliablilty.  
The KAV400xi is easy to operate and integrate into your system.  
The remote control accesses all amplifier functions, and remote  
control connection options allow the KAV400xi to be easily con-  
nected with other components. The Theater Throughput feature  
provides easy integration of the amplifier into a home theater  
system.  
This owner’s reference manual contains important information on  
the placement, installation, and operation of the KAV400xi.  
Please read this information carefully. A thorough understanding of  
these details will help ensure satisfactory operation and long life  
for your KAV400xi and related system components.  
Krell KAV400xi  
1
 
Definition of Terms  
Following are the definitions of key terms used in your owner’s ref-  
erence manual.  
CONFIGURATIONS  
Theater Throughput  
Theater Throughput is a Krell configuration option that allows the  
signal from a surround preamp/processor to pass through a Krell  
preamplifier or integrated amplifier with no gain, for integrated vol-  
ume and balance management of Krell home theater systems.  
Balanced  
INPUT AND OUTPUT  
CONNECTIONS  
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 instal-  
lations, 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.  
Single-ended  
A two-wire input or output circuit. Use care when using single-  
ended connections as the ground connection is made last and  
broken first. Turn the system off prior to making or breaking single-  
ended connections. Single-ended connections are not recom-  
mended for connections requiring long cable runs.  
Off  
OPERATION  
The component is off when the AC power cord is unplugged from  
the wall receptacle.  
Stand-by Mode  
A low power consumption status that keeps the audio circuits at  
idle. When you plug the AC power cord into the wall receptacle,  
the red stand-by LED illuminates. The component is now ready to  
be switched to the operational mode. Krell recommends leaving  
the component in the stand-by mode when it is not playing music.  
Operational Mode  
When the component is in the stand-by mode, and you press the  
power button on the front panel or the power key on the remote  
control, the blue power LED illuminates. The component is in the  
operational mode and is ready to play music.  
2
Krell KAV–400xi  
 
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.  
Krell KAV400xi  
3
 
Unpacking  
Follow these steps to safely unpack the KAV400xi:  
1. Open the shipping box and remove the top layer of foam. The  
KAV400xi and the KAV400xi accessory kit containing the  
following items are visible:  
1 AC power cord  
1 12 VDC (12 V trigger) cable  
2 spare loudspeaker fuses (AGC 8)  
1 KAV–400xi remote control  
1 CR2025 lithium battery  
1 packet containing the Quick Setup Guide  
and the warranty registration card  
2. Grasp the underside of the amplifier and lift it straight out of  
the packing box.  
3. Place the amplifier in a safe location and remove the protective  
plastic wrapping.  
If any of these items are not included please contact your authorized  
Krell dealer.  
Notes  
Save all packing materials. If you must ship your KAV400xi in the future,  
repack the unit in its original packaging to prevent shipping damage.  
4
Krell KAV–400xi  
 
Placement  
Before you install the KAV400xi into your system, review the fol-  
lowing guidelines to choose the location for the KAV400xi. This  
will facilitate a clean, trouble-free installation. The KAV400xi does  
not require any type of special rack or cabinet for installation. For  
the dimensions of the KAV400xi, see Specifications, on the  
back cover.  
Place the KAV400xi on a firm, level surface, away from exces-  
sive heat, humidity, or moisture. The KAV400xi requires at least  
two inches (5 cm) of clearance on each side and at least two inch-  
es (5 cm) of clearance above and below the component to provide  
adequate ventilation. Installations inside cabinetry may need extra  
ventilation.  
The KAV400xi is not hum-sensitive. Other components may be  
placed on or around the KAV400xi (make sure ventilation grids  
remain unobstructed).  
Place the amplifier as close to the loudspeakers as possible and  
keep loudspeaker cable lengths to a minimum. Loudspeaker cable  
adds impedance to the load the amplifier must drive, regardless of  
the cable’s gauge. All Krell amplifiers drive the lowest impedances  
with ease, but long loudspeaker cables reduce the maximum  
power that can be delivered to the loudspeakers.  
The KAV400xi has superb regulation and does not require a ded-  
icated AC circuit. Avoid connections through extension cords or  
multiple AC adapters. High quality 15 amp grounded AC strips are  
acceptable. High quality AC line conditioners or filters may be  
used if they are grounded and meet or exceed the unit’s maximum  
power consumption of 1800 Watts.  
AC Power  
Guidelines  
The KAV400xi should be operated only with the power cord  
supplied. Please contact your authorized Krell dealer, distributor,  
or Krell before using any devices designed to alter or stabilize the  
AC power for the KAV400xi.  
Power Cord  
Krell KAV400xi  
5
 
Figure 1 The KAV400xi Front Panel  
KAV–400xi  
5
11  
10  
3 1 2  
4
6 7  
8 9  
Power  
1
2
3
4
Power Button  
Power LED  
Figure 2 The KAV400xi Remote Control  
Stand-by LED  
Infrared Sensor  
12 Pre Key (Remote)  
Analog Devices  
5
S-1, S-2, S-3, and  
B-1, Buttons, Keys  
and LEDs  
1
8
12  
Activates the  
KAV—400xi remote  
to access amplifier  
commands  
6
5
6
7
Tape Button or Key  
Tape LED  
Mode Indicators  
8
9
Mute Button or Key  
Mute LED  
10  
Volume Adjustment  
Functions  
10 Level Knob / Level Keys  
11 Front Panel Display  
13 Bal (Balance) Keys  
(Remote)  
13  
Note  
Remote control keys listed above function with the KAV400xi. Other keys  
on this remote control may activate other Krell components. Consult the  
Krell reference manual for each model to review your component’s full  
remote control capabilities.  
6
Krell KAV–400xi  
 
Front Panel/Remote Control Description  
See Figures 1 and 2 on page 6  
Power, analog input selections, and volume control accessed via  
the front panel of the KAV400xi are described in the illustration  
legend below. The front panel display shows volume and balance  
levels, and Theater Throughput status. Most front panel features  
can also be activated via the keys on the remote. Descriptions of  
special operational features of the remote control are outlined on  
pages 9-10:  
POWER  
1 Power Button or Key  
Use this button to switch the KAV400xi between the stand-by  
and the operational modes.  
2 Power LED  
The blue power LED illuminates when the KAV400xi is in the  
operational mode. The power LED also flashes when any remote  
control key is pressed.  
3 Stand-by LED  
The red stand-by LED illuminates when the KAV400xi is plugged  
into a standard AC wall receptacle, indicating that the amplifier is  
in the stand-by mode and ready to be switched to the operational  
mode.  
4 Infrared Sensor  
The infrared sensor receives commands from the KAV400xi  
remote control. For proper remote control operation, make sure  
that nothing is obstructing the infrared sensor.  
5 S-1, S-2, S-3, and B-1 Buttons, Keys, and LEDs  
ANALOG  
Use these buttons to select a balanced analog source component  
(B-1) via an XLR connector or a single-ended analog source com-  
ponent (S-1, S-2, or S-3) via single-ended RCA connectors. When  
the button or key is selected, the LED illuminates.  
SOURCE  
COMPONENTS  
6 Tape Button or Key  
Use this button to playback pre-recorded tapes. You may also use  
this button to compare the output signal of an analog tape recorder  
to an audio source. See Tape Input and Output, on page 16.  
7 Tape LED  
The red tape monitor LED illuminates when the tape monitor is  
activated. The LED does not illuminate when an audio source is  
activated.  
Krell KAV400xi  
7
 
Front Panel Description, continued  
MODE INDICATORS  
8 Mute Button or Key  
Use this button to interrupt the signal of the input you have select-  
ed. To unmute, press the mute button again.  
9 Mute LED  
The red mute LED illuminates when you press the mute button on  
the front panel or the mute key on the remote control (8).  
10 Level Knob / Level Keys  
VOLUME ADJUSTMENT  
FUNCTIONS  
The level knob on the front panel or the level keys on the remote  
control adjust the amplifier output level. The output level is indicat-  
ed numerically on the front panel display, with a range from 0-151.  
11 Front Panel Display  
The front panel display shows volume and balance levels and  
Theater Throughput status.  
8
Krell KAV–400xi  
 
Remote Control Only  
See Figure 2 on page 6  
The KAV400xi remote control uses one CR2025 lithium battery,  
which is included with the shipment.  
Battery  
Installation  
and  
To open the battery compartment on the back of the remote  
control:  
Removal  
1. Place the remote face down on the table.  
2. Use your thumbnail or a small jeweler’s or eyeglass screw-  
driver to move the small switch toward the center of the  
remote, while using your index fingernail or screwdriver to pull  
down gently on the slot to the right of the switch. The battery  
compartment will slide out.  
Do not use a knife or other sharp objects to open the battery compart-  
ment; they will scratch the remote control finish.  
Note  
3. Place the battery, positive side up, in the battery tray.  
4. Slide battery compartment back into the remote until you hear  
a click.  
The remote control is ready for operation.  
Replace battery when remote control function becomes intermittent.  
Notes  
Remove battery if the remote control is not used for a long period of time.  
Battery leakage can damage the remote control.  
The KAV400xi remote control accesses complete power amplifier  
and preamplifier functions. A description of the functions unique to  
the KAV400xi follow:  
Remote Control  
Only Functions  
POWER  
12 Pre Key  
Use this key to activate the KAV400xi remote to access amplifier  
commands.  
Krell KAV400xi  
9
 
Remote Control Functions, continued  
VOLUME ADJUSTMENT  
FUNCTION  
13 Bal (Balance) Keys  
Use these keys to shift the balance to the left or the right channel.  
Balance level is indicated in the front panel display (11). To display  
balance, push any key on the remote.  
The front panel display indicates:  
-C-  
when the system is balanced. If the system is not balanced, the  
front panel display indicates that the balance is right or left of cen-  
ter and by how much, on a scale of 1 (least out of balance) to 5  
(most out of balance).  
Example: A display of:  
- - 3  
means that the balance is moderately right of center. A display of:  
5 - -  
means the balance is severely left of center.  
The remote control keys listed above function with the KAV400xi. Other  
keys on this remote control may activate other Krell components, for  
example, compact disc players. Consult the Krell owner’s reference man-  
ual for each component to review your component’s full remote control  
capabilities.  
Note  
10  
Krell KAV400xi  
 
Figure 3 The KAV400xi Back Panel  
21  
20  
INPUTS  
OUTPUTS  
12VDC  
RC–5  
IN  
50/60 Hz  
B–1 RIGHT  
B–1 LEFT  
S – 1  
S – 2  
S – 3  
TAPE  
LEFT OUTPUT  
RIGHT OUTPUT  
TAPE PREAMP  
OUT  
IN  
LEFT  
RIGHT  
FUSE  
AGC  
FUSE  
AGC  
8
8
KAV400xi  
Integrated Amplifier  
NO USER SERVICEABLE PARTS INSIDE  
MADE IN USA  
24 14  
15  
16  
17  
18 19  
14 24  
23  
22  
Amplifier Channel  
Outputs  
14 Left and Right  
Loudspeaker Outputs  
Analog Inputs  
15 Left and Right Balanced  
Analog Inputs  
16 Left and Right Single-  
ended Analog Inputs  
17 Left and Right Tape Inputs  
Analog Outputs  
18 Left and Right Tape  
Outputs  
19 Left and Right Preamp  
Outputs  
Remote Connections  
20 RC-5 In  
21 12 VDC In/Out  
Power  
22 IEC Connector  
23 Line Fuse  
24 AGC 8 Left and Right  
Loudspeaker Fuses  
Krell KAV400xi  
11  
 
Back Panel Description  
See Figure 3 on page 11  
The KAV400xi back panel provides connections for all inputs and  
outputs, power on/off, and additional remote connections.  
14 Left and Right Loudspeaker Outputs  
AMPLIFIER CHANNEL  
OUTPUTS  
The KAV400xi is equipped with standard binding posts for each  
amplifier channel. These connectors accept bare wire, pins, or  
spade lugs. Use the red terminal for the positive connection and  
the black terminal for the negative connection.  
15 Left and Right Balanced Analog Inputs  
The KAV400xi is equipped with one pair of balanced (B-1) inputs  
via XLR connectors.  
ANALOG INPUTS  
16 Left and Right Single-Ended Analog Inputs  
The KAV400xi is equipped with three pairs of single-ended (S-1,  
S-2, or S-3) inputs via RCA connectors.  
17 Left and Right Tape Inputs  
The KAV400xi is equipped with a pair of single-ended tape inputs  
via RCA connectors.  
18 Left and Right Tape Outputs  
ANALOG OUTPUTS  
The KAV400xi is equipped with a pair of single-ended tape  
outputs via RCA connectors.  
19 Left and Right Preamp Outputs  
The KAV400xi is equipped with a pair of single-ended pre-  
amplifier outputs.  
20 RC-5 In  
REMOTE  
The KAV400xi is equipped with an RC-5 input that makes cus-  
tom installation easy and secure by accepting baseband RC-5  
input commands from hardwired remote controllers.  
CONNECTIONS  
21 12 VDC In/Out (12 V Trigger)  
The 12 V Trigger allows you to turn the KAV400xi on or off, or to  
and from stand-by, from other components.  
Out. The output sends 12 VDC (12 V trigger) power on/off signals  
to other Krell components and other devices that incorporate a 12  
V trigger.  
12  
Krell KAV400xi  
 
Back Panel Description, continued  
Remote  
Connections,  
continued  
In. The input receives 12 VDC (12 V trigger) power on/off signals  
from other Krell components and other devices that incorporate a  
12 V trigger.  
The 12 VDC output current is limited to 30 ma.  
Notes  
Consult the owner’s reference of the components used in a custom  
installation to take full advantage of the remote capability of the  
KAV400xi.  
POWER  
22 IEC Connector  
The connector is for use with the provided IEC standard 15 amp  
power cord.  
23 Line Fuse  
The 50/60 Hz line fuse protects the KAV400xi against short cir-  
cuits from the external AC power.  
24 AGC 8 Fuses  
The AGC 8 fuses protect the KAV400xi against short circuits in  
the loudspeaker output.  
Fuses must be replaced with the fuse value specified on the back panel.  
Note  
Krell KAV400xi  
13  
 
Connecting the KAV400xi  
to Your System  
USING BALANCED  
CONNECTIONS  
Krell recommends using balanced interconnect cables. Balanced  
interconnect cables not only can minimize sonic loss but are also  
immune to induced noise, especially with installations using long  
cables. Balanced connections have 6 dB more gain than single-  
ended connections. When level matching is critical, keep this gain  
value in mind.  
Follow these steps to connect the KAV400xi to your system.  
Connection  
Steps  
1. Make sure all power sources and components are off before  
connecting inputs and outputs.  
2. Neatly organize the wiring between the KAV400xi and all sys-  
tem components. Separate AC wires from audio cables to  
prevent hum or other unwanted noises from being introduced  
into the system.  
3. Connect the left and right loudspeaker cables to the integrated  
amplifier’s left and right loudspeaker output terminals (14).  
The KAV400xi uses standard binding posts for each amplifier  
channel. These connectors accept bare wire, pins, or spade  
lugs. Use the red terminal for the positive connection and the  
black terminal for the negative connection.  
4. Connect the left and right outputs of your source components to  
the appropriate analog inputs (15, 16, 17) on the KAV400xi.  
The KAV400xi is equipped with one balanced input (B-1),  
three single-ended inputs (S-1, S-2, or S-3), and one tape input.  
The B-1, S-1, S-2, and S-3 inputs can be configured for Theater  
Throughput. See Optional Configurations, on page 17 for  
information on configuring an input for Theater Throughput.  
5. Use the preamp outputs (19) to connect to an additional power  
amplifier, for loudspeakers in another room.  
6. Plug the AC cord into the IEC connector (22) on the back  
panel of the KAV400xi. Plug the remaining end into the AC  
wall receptacle. The red stand-by LED (3) illuminates. There is  
no audible click or delay.  
Pin 1 Shield (ground)  
Pin assignments for the  
XLR connectors  
Pin 2 Non-inverting (hot) (0°)  
Pin 3 Inverting (cold) (180°)  
14  
Krell KAV400xi  
 
Operating Your KAV400xi  
This section provides information about operating the KAV400xi.  
The KAV400xi provides basic input selection and volume control  
operation from the front panel. The remote control includes addi-  
tional preamplifier and volume functions as well as compact disc  
transport and amplifier controls. See Remote Control Only, on  
page 9, for more information.  
After the KAV400xi is connected to AC power and in the stand-by  
mode, use the power button or key (1) to switch the component  
to the operational mode. The blue power LED (2) illuminates.  
The KAV400xi Remote Control Integrated Amplifier is easy to  
operate. However, great care should be exercised when operating  
a system that includes the KAV400xi, because of the amplifier’s  
power output. Switching between active sources without muting  
the preamplifier output, or bumping/miscuing a device, can gener-  
ate large transients at low frequencies. The KAV400xi may gen-  
erate enough power with these transients to damage most loud-  
speakers. To avoid damage, be sure to switch all sources with the  
preamplifier level either muted or fully attenuated. Do not change  
inputs to the amplifier while the amplifier is on.  
Amplifier  
Operation  
Krell amplifiers have large reserves of clean power and can safely drive  
loudspeakers to higher sound pressure levels than other amplifiers.  
However, use care when setting high playback levels and lower the vol-  
ume level at any sign of loudspeaker distress.  
Note  
When powering up any system, always turn amplifiers on last.  
When powering down, always turn amplifiers off first.  
ON/OFF AND  
STAND-BY OPERATION  
1. When the amplifier is in stand-by mode, with the red stand-by  
LED (3) illuminated, turn the amplifier on by pressing the  
power button on the front panel or the power key on the  
remote control (1). There is an audible click. The blue power  
LED (2) illuminates, and the red stand-by LED (3) turns off.  
The KAV–400xi is now in the operational mode.  
2. With the amplifier in the mute position, or the volume control  
fully attenuated, select a source from the front panel or the  
remote control (5).  
Krell KAV400xi  
15  
 
Operating Your KAV400xi, continued  
ON/OFF AND STAND-BY  
3. Start playing the source.  
OPERATION, continued  
4. Set the volume to a comfortable listening level using the level  
knob on the front panel or the level keys on the remote control  
(10).  
5. To turn the amplifier off, press the power button on the front  
panel or the power key on the remote control (1). The red  
stand-by LED (3) illuminates.  
It is now safe to turn off the rest of the system.  
Tape Input and  
Output  
The KAV400xi has a discrete tape input and output. The tape  
output is used to send an input signal from S-1, S-2, S-3, or B-1 to  
a recording device or processor. You can use the tape feature in  
three ways:  
1. Use the tape button on the front panel or the tape key on the  
remote (6) to playback pre-recorded tapes.  
2. Use the tape input to compare the output signal of a three-  
head analog tape recorder to the output signal of an audio  
source, when making a recording. To activate this function,  
select an audio source for recording using either the S-1, S-2,  
S-3, or B-1 analog input buttons or keys (5). Press the tape  
button on the front panel or tape key on the remote on the to  
switch between the tape recorder output (red tape monitor LED  
[7] illuminated) and the input source (red tape monitor LED not  
illuminated).  
3. Use the tape output to create a processor loop, when the  
KAV400xi is connected to a graphic equalizer or other ancil-  
lary equipment. To activate this function, connect the equip-  
ment to the KAV400xi tape outputs (18) as described in the  
equipment manufacturer’s manual. Press the tape button on  
the front panel or tape key on the remote to switch between  
the processor output (red tape monitor LED [7] illuminated)  
and the input source (red tape monitor LED not illuminated).  
Note  
When changing sources, lower the volume to off or mute the output. This  
ensures that the next source played does not damage your system with  
a high output transient.  
16  
Krell KAV400xi  
 
Optional Configurations  
To simplify the integration of an audio/video surround sound  
Configuring  
the KAV400xi  
for Theater  
Throughput  
processor into your system, set any input on the KAV400xi (S-1,  
S-2, S-3, or B-1) to operate as a unity gain stage. Krell calls this  
configuration Theater Throughput.  
When you configure a KAV400xi input for Theater Throughput,  
the KAV400xi volume and balance controls are transferred to the  
audio/video surround sound processor, for integrated volume and  
balance management as well as ease of operation. As long as the  
KAV400xi input is configured for Theater Throughput and con-  
nected to the audio/video surround sound processor’s input config-  
ured for Theater Throughput, all KAV400xi volume and balance  
adjustments are made through the surround sound processor.  
When you disengage the KAV400xi input from Theater  
Throughput, the volume and balance controls revert to the  
KAV400xi.  
HOW TO ACTIVATE  
AN INPUT FOR  
THEATER  
1. Turn on the KAV400xi power.  
2. Press and release the button on the front panel or the key on  
the remote (5) for the device you wish to configure for Theater  
Throughput. The LED illuminates.  
THROUGHPUT  
3. Press the button or key again and hold it for four seconds. The  
front panel display (11) shows “thr.”  
IMPORTANT  
Make sure the level on the source component is set to zero when  
configuring the KAV400xi input set for Theater Throughput.  
Source components without level controls should not be connected  
to an input configured for Theater Throughput. Doing so can result  
in excessive and possibly damaging volume levels when the source  
is played. Always turn off the source component before you config-  
ure any input on the KAV400xi for Theater Throughput.  
1. Turn on the KAV400xi power.  
HOW TO DISENGAGE  
AN INPUT FOR  
THEATER  
2. Press and release the button on the front panel or the key on  
the remote (5) for the device you wish to disengage from  
Theater Throughput. The LED illuminates.  
THROUGHPUT  
3. Press the button or key again and hold it for four seconds. The  
phrase "thr" disappears from the front panel display (11), indi-  
cating that Theater Throughput is disengaged.  
Krell KAV400xi  
17  
 
Optional Configurations, continued  
The KAV400xi is equipped with a pair of single-ended preamplifi-  
er outputs (19). These outputs enable the KAV400xi to be used  
as a preamplifier when it is connected to a separate amplifier.  
Preamplifier  
Output  
Note  
The amplifier channel outputs are always active, even when the  
KAV400xi is being used only as a preamplifier.  
18  
Krell KAV–400xi  
 
How to Troubleshoot System Noise  
AC grounding becomes critical when connecting high performance  
audio components. When you mix and match audio components,  
each with its own ground potential, a low frequency hum may  
occur in one or both loudspeakers. This sometimes occurs when  
introducing a new component into a system.  
If a low frequency hum emanates from the loudspeakers when you  
place the KAV400xi amplifier into the system, follow these simple  
troubleshooting steps:  
1. Check all cable terminations, making sure they have solid sol-  
der joints and are of sound construction.  
2. With the amplifier off, remove the interconnect cables, then  
turn the amplifier on. If the hum disappears, turn the amplifier  
off and reinsert one of the interconnect cables. Turn the  
amplifier back on. If the hum reappears with one or both  
cables reinserted, there may be a defective cable. Have the  
interconnect cables checked before proceeding.  
3. 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 solve this  
problem.  
Krell KAV400xi  
19  
 
Questions and Answers  
Q. Should I leave my KAV400xi on at all times?  
A. Krell recommends leaving the amplifier in the stand-by mode,  
ready to play music. If you are not going to play music for a  
long time, you may disconnect the amplifier from AC power  
supply.  
Q. When I turn on the amplifier there is a loud hum through the  
loudspeakers. What should I do?  
A. When a new component is introduced into a system, a low  
frequency hum may occur in one or both loudspeakers. Check  
all input and output connections, making sure they are of  
sound construction. See How to Troubleshoot System  
Noise, on page 19. If the interconnects and cables are sound,  
you may be experiencing a ground loop. This can often be  
easily eliminated. Please contact your authorized Krell dealer,  
distributor, or Krell for suggestions on how to solve this  
problem.  
Q. When I use the KAV400xi’s Theater Throughput capability  
with my surround sound processor, where should I set the  
volume on the KAV400xi?  
A. You do not need to set the volume on the KAV400xi because  
the amplifier’s volume and balance controls are not active in  
the Theater Throughput mode. When using the KAV400xi’s  
Theater Throughput capability, the surround sound processor  
controls the system volume. See Optional Configurations, on  
page 17.  
20  
Krell KAV400xi  
 
Warranty  
This Krell product has a limited warranty of five years for parts and labor on circuitry. Should  
this 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.  
To register your product  
for warranty benefits,  
please complete and return  
the Warranty Registration  
Card enclosed in the ship-  
ping box within 15 days of  
purchase. Thank you.  
The warranty does not apply to damage caused by acts of God or nature.  
The warranty on this page 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 this 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 this product, even if Krell has been advised of  
the possibility of such damages.  
Proof of purchase in the form of a bill of sale or receipted invoice substantiating that the unit  
is within the warranty period must be presented to obtain warranty service. The warranty  
begins on the date of retail purchase, as noted on the bill of sale or receipted invoice from  
an authorized Krell dealer or distributor.  
The warranty for Krell products is valid only in the country to which they were 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.  
If a unit 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 unit 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 units 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 unit.  
Replacement parts and/or products will be furnished only to the distributor performing  
service on this unit 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, perfora-  
tion of chassis, updates, or modifications performed to the unit will void the warranty.  
The operating voltage of this unit 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 specifi-  
cations 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.  
Krell KAV400xi  
21  
 
Return Authorization  
Procedure  
HOW TO EXPEDITE  
SERVICE  
If you believe there is a problem with your component, please con-  
tact 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:  
To contact the Krell Service Department:  
TEL  
203-799-9954  
Monday-Friday, 9:00 am to 5:00 pm EST  
203-799-9796  
FAX  
E-MAIL  
HOW TO RETURN  
A PRODUCT  
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 ship-  
ping address from the Krell Service Department.  
2. Insure and accept all liability for loss or damage to the product  
during shipment to the Krell factory and ensure all freight (ship-  
ping) charges are prepaid.  
The product may also be hand delivered if arrangements with the  
Service Department have been made in advance. Proof of pur-  
chase 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 pack-  
aging 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.  
HOW TO PURCHASE  
ADDITIONAL PACKING  
To purchase additional packaging, please contact your authorized  
Krell dealer, distributor, or the Krell Service Department for assis-  
tance.  
22  
Krell KAV–400xi  
 
Krell Industries, Inc.  
KAV400xi  
Remote Control  
Integrated Amplifier  
v 03.0  
45 Connair Road  
Orange, CT 06477-3650 USA  
TEL 203-799-9954, FAX 203-891-2028  
Specifications  
All operational features, functions,  
FREQUENCY RESPONSE  
20 Hz–20 kHz  
OUTPUTS  
2 loudspeaker via 5-standard  
specifications, and policies are  
subject to change without  
notification.  
+0 dB, -0.07 dB  
binding posts  
SIGNAL-TO-NOISE RATIO  
“A” weighted  
1 pair single-ended preamp  
via RCA connectors  
99 dB  
TAPE INPUT AND OUTPUT  
1 pair single-ended via RCA  
connectors  
TOTAL HARMONIC  
DISTORTION (THD)  
20 Hz–20 kHz  
OUTPUT VOLTAGE  
Peak to peak 138 V  
1 kHz <0.04%  
20 kHz <0.25%  
OUTPUT POWER  
8 Ohms 200 W  
GAIN  
35.8 dB  
4 Ohms 400 W  
INPUT SENSITIVITY  
0.644 Vrms  
REMOTE CONTROL  
1 handheld wireless remote  
INPUT IMPEDANCE  
1 12 VDC Out/In (12 V trigger)  
47 kOhms  
1 RC-5 input via a DC power  
connector  
OUTPUT IMPEDANCE  
0.17 Ohms  
DIMENSIONS  
17.3w x 3.5h x 17d in.  
POWER CONSUMPTION  
Idle 20 W  
50w x 8.9h x 43.2d cm  
Max. 1,800 W  
WEIGHT  
Shipped  
TRANSFORMER  
750 VA  
36.0 lb., 16.4 kg  
INPUTS  
All with Theater Throughput  
Unit only  
31.0 lb., 14.1 kg  
1 pair balanced via XLR connectors  
3 pair single-ended  
via RCA connectors  
 

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