KAV–280p
Remote Control
Preamplifier
THE LEADER IN AUDIO ENGINEERING
Instructions for Use
Owner’s Reference
Download from Www.Somanuals.com. All Manuals Search And Download.
Contents
Page
INTRODUCTION
DEFINITION OF TERMS
UNPACKING
1
2
3
PLACEMENT
4
4
AC Power Guidelines
FRONT PANEL DESCRIPTION
BACK PANEL DESCRIPTION
6
9
REMOTE CONTROL DESCRIPTION
Battery Installation and Removal
Remote Control Functions
12
12
12
CONNECTING THE KAV–280p TO YOUR SYSTEM
Connection Steps
15
15
OPERATING YOUR KAV–280p
Preamplifier Operation
16
16
17
Tape Input and Output
CONFIGURING THE KAV–280p
FOR THEATER THROUGHPUT
19
HOW TO TROUBLESHOOT SYSTEM NOISE
QUESTIONS AND ANSWERS
WARRANTY
20
21
22
RETURN AUTHORIZATION PROCEDURE
SPECIFICATIONS
23
Back Cover
Krell KAV–280p
iii
Download from Www.Somanuals.com. All Manuals Search And Download.
Illustrations
Page
FIGURE 1 The KAV–280p Front Panel
FIGURE 2 The KAV–280p Back Panel
FIGURE 3 The KAV–280p Remote Control
5
8
11
iv
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Introduction
Thank you for your purchase of the Krell KAV–280p Remote
Control Preamplifier. The KAV-280p uses current mode and sur-
face mount technologies derived directly from the state-of-the-art
Krell KCT Preamplifier.
The Class A direct-coupled design of the KAV–280p means that
the signal path is fully balanced from input to output. This includes
a fully balanced volume control. Circuits are powered by a dedicat-
ed supply with discrete voltage regulators and there is a separate,
dedicated power supply for all digital control circuits. All signal
switching is accomplished via hermetically sealed multiple contact
precision relays.
The KAV–280p provides a high level of operational convenience
and functional versatility. It is easy to integrate into your system.
The remote control accesses all amplifier functions, and remote
control connection options on the back panel allow the KAV–280p
to be easily connected with other components. With its unique
Theater Throughput TM feature, the KAV–280p can easily adapt to
home theater applications.
This owner’s reference manual contains important information on
the placement, installation, and operation of the KAV–280p.
Please read this information carefully. A thorough understanding of
these details will help ensure satisfactory operation and long life
for your KAV–280p and related system components.
Krell KAV–280p
1
Download from Www.Somanuals.com. All Manuals Search And Download.
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–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Definition of Terms, continued
Krell Current Mode
TECHNOLOGY
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.
Surface Mount Technology (SMT)
SMT allows individual 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 reliability.
Unpacking
1. Open the shipping box and remove the top layer of foam. The
following items are visible:
1
1
KAV–280p Remote Control Preamplifier
Accessory Kit containing:
1
1
1
1
AC power cord
12 VDC (12 V trigger) cable
KAV–280p remote control
CR2025 lithium battery for the remote
1
Packet containing the owner’s reference and the warranty
registration card.
2. Grasp the underside of the preamplifier and lift it straight out of
the packing box.
3. Place the preamplifier in a safe location and remove the pro-
tective 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 KAV–280p in the future,
repack the unit in its original packaging to prevent shipping damage.
Krell KAV–280p
3
Download from Www.Somanuals.com. All Manuals Search And Download.
Placement
Before you install the KAV–280p into your system, review the fol-
lowing guidelines to choose the location for the KAV–280p. This
will facilitate a clean, trouble-free installation. The KAV–280p does
not require any type of special rack or cabinet for installation. For
the dimensions of the KAV–280p, see Specifications, on the back
cover.
Place the KAV–280p on a firm, level surface, away from excessive
heat, humidity, or moisture. The KAV–280p is not hum-sensitive.
Other components may be placed on or around the KAV–280p.
Make sure the top and bottom ventilation grids are unobstructed.
You may experiment with feet or cones as long as they are not
permanently affixed to the chassis. Any unauthorized modifications
to the electronics or chassis will void the warranty.
The KAV–280p has superb regulation and does not require a dedi-
cated 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. Contact your authorized Krell dealer,
distributor, or Krell before using any devices designed to alter or
stabilize the AC power for the KAV–280p.
AC Power
Guidelines
The KAV–280p should be operated only with the power cord
supplied.
4
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Description
See Figure 1 on page 5
The front panel of the KAV–280p accesses power on and off,
Front Panel
Functions
analog input selections, volume control, and mute. The front panel
display shows the volume and balance levels, and Theater
Throughput status.
POWER
1 Power Button
Use this button to switch the KAV–280p between the stand-by and
the operational modes.
2 Power LED
The blue power LED illuminates when the KAV–280p 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 KAV–280p 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 KAV–280p
remote control. For proper remote control operation, make sure
the infrared sensor is clear of any obstructions.
ANALOG
5 S-1, S-2, S-3, and B-1 Buttons and LEDs
SOURCE
COMPONENTS
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. The
selected button’s LED illuminates.
6 Tape Button
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 18.
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.
6
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Front Panel Description continued
MODE INDICATORS
8 Mute Button
Use this button to interrupt the signal from the active source you
have selected. When the red mute LED (9) on the KAV–280p is
illuminated, there is no signal output.
To unmute the signal from the active source, press the mute but-
ton again. The red mute LED extinguishes.
9 Mute LED
The red mute LED illuminates when you have interrupted the signal
from the active source using the mute button (8) on the front panel
or mute key (25) on the remote.
10 Level Knob
VOLUME ADJUSTMENT
FUNCTIONS
The volume level knob adjusts the processor output level, which
is indicated numerically on the front panel display (11); range is
0-151.
To access the balance feature, use the remote control. See
Balance Keys, on page 13.
11 Front Panel Display
The front panel display shows volume levels, balance levels, and
Theater Throughput status.
Krell KAV–280p
7
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
Back Panel Description
See Figure 2 on page 8
The KAV–280p back panel provides connections for all inputs and
outputs, power on/off, and additional remote connections.
Back Panel
Functions
12 Left and Right Balanced Analog Inputs
The KAV–280p is equipped with one pair of balanced (B-1) inputs
via XLR connectors.
ANALOG INPUTS
13 Left and Right Single-ended Analog Inputs
The KAV–280p is equipped with three pairs of single-ended (S-1,
S-2, or S-3) inputs via RCA connectors.
14 Left and Right Tape Inputs
The KAV–280p is equipped with a pair of single-ended tape inputs
via RCA connectors.
15 Left and Right Tape Outputs
ANALOG OUTPUTS
The KAV–280p is equipped with a pair of single-ended tape
outputs via RCA connectors.
16 Left and Right Single-ended Outputs
The KAV–280p is equipped with a pair of single-ended preamplifier
outputs.
17 Left and Right Balanced Outputs
The KAV–280p is equipped with a pair of balanced preamplifier
outputs.
17 12 VDC Out
BACK PANEL REMOTE
CONNECTIONS
The KAV–280p is equipped with an output that sends 12 VDC
(12 V trigger) power on/off signals to 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, from the
KAV–280p. When the KAV–280p is switched between stand-by
and operate, it sends a signal from the 12 VDC Out that will switch
other components, allowing whole systems or parts of systems to
be easily coordinated.
Krell KAV–280p
9
Download from Www.Somanuals.com. All Manuals Search And Download.
Back Panel Description, continued
BACK PANEL REMOTE
17 12 VDC In
CONNECTIONS, continued
The KAV–280p is equipped with an input that receives 12 VDC
(12 V trigger) power on/off signals from other Krell components
and other devices that incorporate a 12 V trigger. This allows you
to turn the KAV–280p on or off, or to and from stand-by, from other
components.
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
KAV–280p.
18 RC-5 In
The KAV–280p is equipped with an RC-5 input that makes custom
installation easy and secure by accepting baseband RC-5 input
commands from hardwired remote controllers.
POWER
19 Line Fuse and Fuseholder
The 50/60 Hz line fuse protects the KAV–280p in the event of a
component failure.
The fuseholder drawer houses two line fuses: one is functional
and one is a spare.
When the line fuse needs to be replaced, use the spare fuse provided.
Unplug the component before replacing the fuse. Use a 0.5A, slow-blow,
5 x 20 mm fuse for 100-120 VAC, or a 0.25A, slow-blow, 5 x 20 mm fuse
for 220-240 VAC.
Note
20 IEC Connector
The connector is for use with the provided IEC standard 15 amp
power cord.
10
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Figure 3 The KAV–280p Remote Control
Power
22 Power Key
23 Pre Key
22
23
25
Analog Functions
24 Analog Input Keys
25 Tape Key
26
Output Control
Functions
26 Mute Key
24
27
27 Vol (Volume) Keys
28 Bal (Balance) Keys
28
Note
The remote control keys listed above function with the KAV–280p. Other
keys on this remote control may activate other Krell components, for exam-
ple, other compact disc players. Consult the Krell owner’s reference manual
for each component to review the remote control capabilities for each Krell
component.
Krell KAV–280p
11
Download from Www.Somanuals.com. All Manuals Search And Download.
Remote Control Description
See Figure 3 on page 11
The KAV–280p 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 KAV–280p remote control accesses all preamplifier functions.
A description of the remote control keys that activate the
KAV–280p follows.
Remote Control
Functions
Note
When you press a function key on the remote, the blue power LED (2) will
flash. (The LED will flash repeatedly if a key is held down.)
POWER
22 Pwr (Power) Key
Use this key to switch the KAV–280p between the stand-by and
the operational modes.
12
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Remote Control Functions continued
POWER, continued
23 Pre Key
Use this key to activate the KAV–280p remote and access other pre-
amplifier commands. You can then access preamplifier commands
until you press a different activation key, for example the CD key to
access commands for a Krell compact disc player. To return to the
preamplifier commands, press the pre key again. You only need to
press an activation key once. The remote “remembers” whether the
pre key or the CD key has been pressed most recently.
ANALOG FUNCTIONS
24 Analog Input Keys
Use these keys to select a balanced input (B-1) or single-ended
input (S-1, S-2, or S-3). The selected input LED on the front panel
illuminates.
25 Tape Key
Use this key to monitor the output signal of a three-head analog
tape recorder, compared to the output signal from an audio
source, when making a recording. See Tape Input and Output,
on page 18. The red tape monitor LED on the front panel illumi-
nates when the tape monitor is activated.
OUTPUT CONTROL
FUNCTIONS
26 Mute Key
Use this key to interrupt the signal from the active source you
have selected. When the red mute LED (9) on the KAV–280p is
illuminated, there is no signal output.
To unmute the signal from the active source, press the mute key
again. The red mute LED extinguishes.
27 Vol (Volume) Keys
Press these keys to adjust the amplifier output level, which is indi-
cated numerically on the front panel display (11); range is 0-151.
28 Bal (Balance) Keys
Use these keys to shift the balance to the left or the right channel,
in 1 dB increments. Balance level is indicated in the front panel
display (11).
Krell KAV–280p
13
Download from Www.Somanuals.com. All Manuals Search And Download.
Remote Control Functions continued
Analog Functions,
To access and display balance, push either the “L” or the “R” bal-
continued
ance key on the remote. The front panel display indicates the bal-
ance setting. After 3 seconds of inactivity or after a volume adjust-
ment, the front panel display reverts to the volume setting.
The front panel display indicates:
– C –
when the balance is centered. If the balance is not centered, the
front panel display indicates balance right or left of center, and
how much the balance is off center, on a scale of 1 (slightly off
center) to 5 (completely on one side).
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.
Note
The remote control keys listed above function with the KAV–280p. 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 the remote control capabilities for each
Krell component.
14
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Connecting the KAV–280p
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 KAV–280p 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 KAV–280p 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 outputs of your source components to the inputs
on the KAV–280p.
The KAV–280p has one pair of balanced outputs via XLR con-
nectors and one pair of single-ended outputs via RCA connec-
tors. Both balanced and single-ended outputs are active at all
times, allowing simultaneous connections to separate ampli-
fiers or separate systems.
Do not connect both outputs to a single stereo amplifier at one time.
Note
4. Connect the outputs of the KAV–280p to the inputs of your power
amplifier.
The KAV–280p is equipped with one balanced input via XLR
connectors (B-1), three single-ended inputs via RCA connectors
(S-1, S-2, and S-3), and one tape input via RCA connectors.
The B-1, S-1, S-2, and S-3 inputs can be configured for Theater
Throughput. See Configuring the KAV–280p for Theater
Throughput, on page 19.
5. Plug the AC cord into the IEC connector (21) on the back
panel of the KAV–280p. Plug the remaining end into the AC
wall receptacle. The red stand-by LED (3) illuminates, and the
front panel display will flash “– – –” for 10 seconds. When the
display stops flashing, the preamplifier is ready to use.
Krell KAV–280p
15
Download from Www.Somanuals.com. All Manuals Search And Download.
Connecting the KAV–280p to Your System continued
Pin 1 Shield (ground)
Pin assignments for the
XLR connectors
Pin 2 Non-inverting (hot) (0°)
Pin 3 Inverting (cold) (180°)
RC-5 IN
Additional
This input accepts baseband RC-5 input commands. It facilitates
custom installations by allowing the KAV–280p to be controlled via
hard-wired signals from various remote devices.
Connections
12 VDC REMOTE POWER IN / OUT
The input accepts 12 Volt power on/off signals from other Krell
components and the output sends 12 volt power on/off signals to
other Krell components, as well as to other devices that incorpo-
rate a 12-Volt power on/off trigger input.
This feature allows enables the remote turn on/off of other compo-
nents when the KAV–280p is powered on/off.
Consult the owner’s reference of any device used in a custom installation
to take full advantage of the remote capability of the KAV–280p.
Note
16
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Operating Your KAV–280p
This section provides information about operating the KAV–280p.
The KAV–280p provides basic input selection and volume control
operation from the front panel. The remote control includes addi-
tional preamplifier functions as well as CD transport and amplifier
controls. See Remote Control, on page 12, for more information.
The KAV–280p Remote Control Premplifier is easy to operate.
Preamplifier
Operation
1. When the preamplifier is in stand-by mode, with the red stand-
by LED (3) illuminated, turn the preamplifier on by pressing the
power button (1), or pressing the power key (22) on the remote
control. The blue power LED (2) illuminates, and the red stand-
by LED (3) turns off. The preamplifier is now ready for opera-
tion.
2. To access preamplifier functions via the remote control, press
the pre key (23) on the remote control.
When you press a function key on the remote, the blue power LED (2)
will flash.
Note
3. Choose a listening source and select the source input.
4. Start playing the source. Set the volume to a comfortable lis-
tening level using the level knob(10) or volume keys (28).
5. When changing sources, lower the volume to the off position or
mute the output (see Mute, on page 13). This insures that the
next source played will not damage your system with a high
output transient.
6. To turn the preamplifier off, press the power button (1) or
power key (22). The red stand-by LED (3) illuminates.
When powering up any system, always turn amplifiers on last. When
powering down, always turn amplifiers off first.
Note
Krell KAV–280p
17
Download from Www.Somanuals.com. All Manuals Search And Download.
Operating Your KAV–280p, continued
The KAV–280cd has a discrete tape input and output. The tape
Tape Input and
Output
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 this button 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 (13), or B-1 (12) analog input buttons (5) or keys (24).
Press the tape button (6) or tape key (25) on the remote con-
trol to switch between the tape recorder output (red tape moni-
tor LED [7] illuminated) and the input source (red tape monitor
LED [7] not illuminated).
3. Use the tape output to create a processor loop, when the
KAV–280p is connected to a graphic equalizer or other ancil-
lary equipment. To activate this function, connect the equip-
ment to the KAV–280p tape outputs (15) as described in the
equipment manufacturer’s manual. Press the tape button (6) or
tape key (25) on the remote control to switch between the
processor output (red tape monitor LED [7] illuminated) and
the input source (red tape monitor LED [7] 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.
18
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Configuring the KAV–280p for Theater Throughput
To simplify the integration of an audio/video surround sound
processor into your system, set any input on the KAV–280p (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 KAV–280p input for Theater Throughput,
the KAV–280p 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
KAV–280p input is configured for Theater Throughput and con-
nected to the audio/video surround sound processor’s input config-
ured for Theater Throughput, all KAV–280p volume and balance
adjustments are made through the surround sound processor.
When you disengage the KAV–280p input from Theater
Throughput, the volume and balance controls revert to the
KAV–280p.
1. Turn on the KAV–280p power.
How to Activate
an Input for
Theater
2. Press and release the button (5) for the device you wish to
configure for Theater Throughput. The LED illuminates.
Throughput
3. Press the button again and hold it for four seconds. The word
thr appears on the front panel display (11).
Make sure the level on the source component is set to zero when
configuring the KAV–280p 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 configure
any input on the KAV–280p for Theater Throughput.
IMPORTANT
1. Turn on the KAV–280p power.
How to Disengage
an Input for
Theater
2. Press and release the button (5) for the device you wish to dis-
engage from Theater Throughput. The LED illuminates.
Throughput
3. Press the button again and hold it for four seconds. The word
thr disappears from the front panel display (11), indicating that
Theater Throughput is disengaged.
Krell KAV–280p
19
Download from Www.Somanuals.com. All Manuals Search And Download.
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 KAV–280p preamplifier into the system, follow these sim-
ple troubleshooting steps:
1. Check all cable terminations, making sure they have solid sol-
der joints and are of sound construction.
2. With the system amplifier off, remove the interconnect cables,
from all the analog source components to the KAV–280p.
(Leave the interconnect cables from the KAV–280p to the sys-
tem amplifier.) Turn the amplifier back on.
3. If the hum disappears, turn the amplifier off and reinsert the
interconnect cables from one of the analog source compo-
nents. Turn the amplifier back on and select, on the
KAV–280p, the source component you have just connected.
Carefully increase the volume on the KAV–280p. If the hum
reappears in one or both channels, those interconnect cables
may be defective. Have the interconnect cables checked
before proceeding.
4. Repeat Step 3 for each analog source component. Connect
only one new component at a time. There is no need to dis-
connect source components you have already connected.
5. If the interconnect cables are sound, you may be experiencing
a ground loop. Please contact your authorized Krell dealer, dis-
tributor, or Krell for suggestions on how to solve this problem.
20
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Questions and Answers
Q. Should I leave my KAV–280p on all the time?
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 20. 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 KAV–280p’s Theater Throughput capability
with my surround sound processor, where should I set the
volume on the KAV–280p?
A. You do not need to set the volume on the KAV–280p because
the preamplifier’s volume and balance controls are not active
in the Theater Throughput mode. When using the KAV–280p’s
Theater Throughput capability, the surround sound processor
controls the system volume. See Configuring the KAV–280p
for Theater Throughput, on page 19.
Krell KAV–280p
21
Download from Www.Somanuals.com. All Manuals Search And Download.
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, includ-
ing, 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 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 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 restric-
tions 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 serv-
ice, 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 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.
22
Krell KAV–280p
Download from Www.Somanuals.com. All Manuals Search And Download.
Return Authorization
Procedure
If you believe there is a problem with your component, please con-
HOW TO EXPEDITE
SERVICE
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.
SERIAL NUMBER
Your KAV–280p product serial number is:
Krell KAV–280p
23
Download from Www.Somanuals.com. All Manuals Search And Download.
Krell Industries, Inc.
KAV–280p
Remote Control
Preamplifier
v 02.0
45 Connair Road
Orange, CT 06477-3650 USA
TEL 203-799-9954, FAX 203-891-2028
E-MAIL [email protected]
Specifications
All operational features, functions,
specifications, and policies are
subject to change without
notification.
FREQUENCY RESPONSE
20 Hz-20 kHz +0 dB, -0.04 dB
0.2 Hz-300 kHz +0, -3 dB
INPUTS
(ALL INPUTS MAY BE SET UP FOR
THEATER THROUGHPUT)
1 pair balanced via XLR connectors
SIGNAL TO NOISE RATIO
>98 dB “A” weighted
>90 dB wideband
3 pair single-ended via RCA
connectors
OUTPUTS
TOTAL HARMONIC DISTORTION
(THD)
1 pair balanced via XLR connectors
1 pair single-ended via RCA
connectors
20 Hz-20 kHz <0.004%
GAIN
TAPE INPUT AND OUTPUT
6.2 dB
single-ended output
balanced output
1 pair single-ended via RCA
connectors
12.3 dB
REMOTE CONTROL
OUTPUT
9 Vrms
1 handheld wireless remote
1 12 VDC Out/In (12 V trigger)
single-ended output
balanced output
18 Vrms
1 RC-5 input via a DC power
connector
INPUT IMPEDANCE
43 kOhms single-ended input
86 KOhms balanced input
DIMENSIONS
17.3w x 3.5h x 17.3d in.
43.8w x 8.9h x 43.8d cm
OUTPUT IMPEDANCE
120 Ohms single-ended output
240 Ohms balanced output
WEIGHT
Shipping 22.0 lb., 10.0 kg
Unit only 16.0 lb., 7.3 kg
POWER CONSUMPTION
22 W stand-by
25W
on
Download from Www.Somanuals.com. All Manuals Search And Download.
|