The Leader M Audio Engineering KAV-300r Stereo Receiver with Theater Throughput Instructions for Use Owner’s Reference
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The Leader M Audio Engineering
KAV-300rStereo Receiver
with Theater Throughput
Instructions for Use
Owner’s Reference
KAV-300rStereo Receiverwith Theater Throughput
v 00.1
Krell Industries, Inc.45 Connair RoadOrange, CT 06477-3650 USA
TEL 203-799-9954FAX 203-891-2028E-MAIL krell@ krellonline.comWEBSITE http://www.krellonline.com
This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC).
WARNINGSThe KAV-3OOr must be placed on a firm, level surface where it is not exposed to drippingor splashing.
The ventilation grids on the top of the KA V-3OOr must be unobstructed at all times during operation. Do notplace flammable material on top of or beneath the component.
Do not remove or bypass the ground pih on the end of the AC power cord. This can cause radio frequencyinterference (RFI) to be introduced into your playback system. Operate the KAV-3OOr only with the powercord supplied.
Turn off all systems’ power before connecting the KAV-3OOr to any compor~ent. Make sure all cable termina-tions are of the highest quality, free from frayed ends, short circuits, or cold solder joints.
Keep any outdoor antenna away from power lines.
IMPORTANTIf an outdoor antenna is connected to the receiver, be sure the antenna system is grounded to provide protectionagainst voltage surges or build-up of static charges. Article 810 of the US National Electric Code (ANSI/NFPA 70)provides information about the proper grounding of the lead-in wire to an antenna-discharge unit, size of ground-ing conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements forgrounding electrodes. The antenna must be designed for the 88-108 MHz band.
THERE ARE NO USER SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT.
Please contact your authorized Krell dealer, distributor, or Krell if you have any questions not addressed inthis reference manual.
This product is manufactured in the United States of Amedca Krell® is a registered trademark of Krell Industries. Inc.. and is restricted for use by KrellIndustries, INC., its subsidiaries, and authorized agents. Theater ThroughputTM is a trademark of Krell Industries. nc. All other trademarks and tradenamesare registered to their respective companies.
@2000 by Krell Industries, Inc. All rights reserved P/N 303989
ContentsINTRODUCTION
DEFINITION OF TERMS
UNPACKING
PLACEMENT
AC Power Guidelines
FRONT PANEL DESCRIPTION
BACK PANEL DESCRIPTION
REMOTE CONTROL DESCRIPTION
Battery Installation and Removal
CONNECTING THE KAV-300r TO YOUR SYSTEM
How to Install Antennae
RECEIVER OPERATION
Power OnTuner Functions
TAPE INPUT AND OUTPUT
OPTIONAL CONFIGURATIONS
Configuring the KAV-300r for Theater ThroughputPreamplifier OutputAdjusting Contrast and Brightness of the Tuner Display
HOW TO TROUBLESHOOT SYSTEM NOISE
QUESTIONS AND ANSWERS
WARRANTY
RETURN AUTHORIZATION PROCEDURE
SPECIFICATIONS
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Back Cover
Krell KAV-300r iii
IllustrationsFIGURE 1 The KAV-300r Front Panel
FIGURE 2 The KAV-300r Back Panel
FIGURE 3 The KAV-300r Remote Control
FIGURE 4 Installing the FM Antenna
Page
4
7
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iv Krell KAV-300r
Introduction Definition of Terms
Thank you for your purchase of the KrellKAV-300r Stereo Receiver with TheaterThroughput. The KAV-300r gives the audio-phile an exceptional-sounding, two-channelmusic system in a convenient package that canstand alone or easily be integrated into a multi-component system. The tuner combines strongreception and quality sound with transparentfunctioning and can be operated through thefront panel or the remote. Six programmabletuner presets allow instant selection of yourfavorite AM or FM stations. The FM mute andhigh frequency blend features also let you con-trol background and between-station noisewhen selecting FM stations with weaker broad-cast signals.
The Theater Throughput feature simplifies theintegration of an audio/video surround soundprocessor into your system. The remote pro-vides convenient operation of-the KAV-300rand other Krell KAV components.
This owner’s reference manual contains impor-tant information on placement, installation, andoperation of the KAV-300r. Please read thisinformation carefully. A thorough understandingof these details will help ensure satisfactoryoperation and long life for your KAV-300r andrelated system components.
Following are the definitions of key terms usedin your owner’s reference manual.
CONFIGURATIONS
Theater ThroughputTheater Throughput is a Krell configuration optionthat allows the signal from a surround preamp/pro-cessor to pass through a Krell preamplifier or inte-grated amplifier with no gain, for integrated vol-ume and balance management of Krell hometheater systems.
INPUT AND OUTPUT CONNECTIONS
BalancedA symmetrical input or output circuit that hasequal impedance from both input terminals to acommon ground reference point. The industrystandard for professional and sound recordinginstallations, balanced connections have 6 dBmore gain than single-ended connections andallow the use of long interconnect cables.Balanced co0nections are completely immunetoinduced noise from the system or the environ-ment.
Single-endedA two-wire input or output circuit. Use care whenusing single-ended connections as the groundconnection is made last and broken first. Turn thesystem off prior to making or breaking single-ended connections. Single-ended connectionsare not recommended for connections requiringlong cable runs.
Krell KAV-300r 1
Definition of Terms, continued Unpacking
OPERATION
OffWhen the power button on the front panelor the power key on the remote control ispressed and the blue power LED turns off,the component is off.
Operational ModeWhen the power button on the front panelor the power key on the remote control ispressed and the blue power LED illumi-nates, the component is in the operationalmode and ready to play music.
Stand-by ModeA low power consumption status that keepsthe audio and regulator circuits at idle. Krellrecommends leaving the component in thestand-by mode when it is not playing music.
1. Open the box and remove the top layer offoam. You see these items:
1 KAV-300r Stereo Receiver1 KAV-300r remote control1 AC power cord1 12 VDC (12 V trigger) cable1 AM loop antenna and base
(base not attached)1 FM indoor dipole antenna1 matching transformer
for the FM antenna2 AAA-size 1.5 V batteries1 trimmer adjustment tool1 owner’s reference manual and
warranty registration card
2. Carefully remove the unit and accessoriesfrom the box. .
3. Remove the foam end caps and protectiveplastic wrap from the unit.
NotesIf any of the items listed above are not included,please contact your authorized Krell dealer,distributor, or Krell immedi-ately for assistance.
Save all packing materials. If you need to shipyour KAV-3OOr in the future, repack the unit inits original packaging to prevent transit dam-age.
2 Krell KAV-300r ’
Placement
Before you integrate the KAV-300r into yoursystem, review the following to properly placeyour component. This will facilitate a clean,trouble-free installation.
For installations inside cabinetry, extra ventila-tion may be necessary. The KAV-300r requiresat least two inches (5 cm) of clearance on eachside and at least two inches (5 cm) of clearanceabove to provide adequate ventilation. TheKAV-300r does not require a special rack orcabinet for installation. For the dimensions ofthe KAV-300r, see Specifications, on the backcover.
The KAV-300r is not particularly hum-sensitive.Other components may be placed on or aroundthe KAV-300r, as long as the ventilation gridsremain unobstructed.
NoteSome televisions and fluorescer~t lights generatehigh levels of AM radiation, which can interferewith AM reception. Electro-magnetic radiationfrom some radio receiving and transmittingequipment (such as televisions, video recorders,digital equipment, and computers) can alsocause noise and interference.
Place the KAV-300r as close to the speakers aspossible. Run long balanced interconnect cablesto the receiver and keep speaker cable lengths toa minimum. Speaker cable adds impedance tothe load the amplifier must drive, regardless of thecable gauge.
AC POWER GUIDELINES
The KAV-300r has superb regulation and doesnot require a dedicated AC circuit. Avoid con-nections through extension cords or multiple ACadapters. High quality 15 amp grounded ACstrips are acceptable. High quality AC line con-ditioners or filters may be used if they aregrounded and meet or exceed the component’spower supply rating of 400 VA.
Power Cord
The KAV-300r should be operated only with thepower cord supplied. Please contact yourauthorized Krell dealer, distributor, or Krellbefore using any devices designed to alter orstabilize the AC power for the KAV-300r.
Krell KAV-300r 3
FIGURE 1 THE KAV-300r FRONT PANEL
1 2 4 6 7 8 9 12 13 14 15 16 17
3 11) 11 18
Power Functions1 Stand-by LED2 Power LED3 Power Button
Tuner Functions4 Preset Buttons5 Tuner Display6 Infrared Sensor7 Mono/St Button8 AM/FM Button9 Tuner Button and LED
10 Tune Buttons11 Seek Buttons
Tape Input andOutput Functions12 Tape Button and LEDAnalog Inputs13 B-l, S-1, S-2, and
S-3 Buttons and LEDsProcessing Indicators14 Theater LED15 Balance LED16 Mute LED17 Level LEDsLevel Adjustments18 Down/Up Buttons
Front Panel DescriptionSee Figure 1 on page 4
The KAV-300r front panel provides on/off, tunerselection, input selection, and volume control.Additional functions are accessed using theremote control. See Remote Control Descrip-tion, on page 11.
A description of front panel buttons and theirfunctions follows.
Power Functions
1 Stand-by LEDThe red stand-by LED illuminates when theKAV-300r is plugged into a standard AC wallreceptacle, indicating that the receiver is readyto be switched on.
2 Power LEDThe blue power LEE) illuminates when theKAV-300r is on.
3 Power ButtonUse this button to turn the KAV-300r on and offand also to switch the 12 VDC-(12 V trigger)output on and off.
Tuner Functions
4 Preset ButtonsThe KAV-300r has six presets that can be usedto save six AM and six FM station settings andrecall programmed settings. The station fre-quency and assigned preset number appear inthe tuner display. Presets are programmedthrough the front panel or remote control. SeeProgramming Presets, on page 17.
5 Tuner DisplayThe tuner display shows the current stationposition as well as the status of other tunerfunctions.
6 Infrared SensorThe infrared sensor receives commands fromthe KAV-300r remote control. For proper remotecontrol operation, make sure the infrared sensoris clear of any obstructions.
7 Mono/St ButtonUse this button to select mono mode (if, forexample, the broadcast signal is weak or noisy).The tuner display window indicates MONO. Astereo broadcast automatically decodes instereo as long as the signal is above the stereoswitching threshold. Mono/Stereo switching inFM is automatic unless mono is selected.
8 AM/FM ButtonUse this button to choose either AM or FM sta-tion frequency.
9 Tuner Button and LEDUse this button to activate the tuner. The redtuner LED above the button illuminates whenthe tuner is activated. The tuner button is alsoused to program presets. See ProgrammingPresets, on ’page 17.
10 Tune ButtonsUse these buttons to move the tuner selectionup or down in one-step increments.
11 Seek ButtonsUse these buttons to find the next available AMor FM station frequency.
Tape Input and Output Functions
12 Tape Button and LEDUse this button to select the tape input and out-put feature. For more information, see TapeInput and Output, on page 17. The red tapeLED.. located above the tape button, illuminateswhen the tape feature ~s activated.
Krell KAV-300r 5
Front Panel, continuedSee Figure 1 on page 4
Analog Inputs
13 B-l, S-1, S-2, and S-3Buttons and LEDs
Use these buttons to choose from one balancedXLR source (B-l), and three single-ended RCAsources (S-1, S-2, and S-3).The red LED abovethe selected input illuminates.
Processing Indicators
14 Theater LEDThe red Theater Throughput LED illuminateswhen you select any of the inputs (S-1, So2, S-3,or B-l) as a Theater Throughput source. SeeOptional Configurations, on page 18.
15 Balance LEDThe red balance LEDs illuminate when youadjust the balance to the left or right channel.Balance adjustment is activated only throughthe remote control. See Balance Keys (47), onpage 12.
16 Mute LEDThe red mute LED illuminates when you pressthe mute key on the remote control. Mute inter-rupts the signal of the input you have selected.To unmute, press mute again.
17 Level LEDsThe red volume level LEDs illuminate to showthe system output level.
Level Adjustments
18 Down/Up ButtonsUse these buttons to adjust the system outputlevel (left button decreases volume; right buttonincreases volume) and system balance levels.
Krell KAV-300r
FIGURE 2 THE KAV- 300r BACK PANEL
19 2¸0 21 23 24 25 26 27 22
28 28 29 30
AntennaConnections19 AM Ant20 FM AntAmplifier Channels21 Right Outp.ut22 Left Output
, Remote Controls23 12 VDC Out24 RC-5
Analog Inputsand Outputs25 Preamp Out26 Tape Out/In27 S-3, S-2, S-1, B-1 InputsFuses28 Fuse AGC 1229 Line FusePower30 IEC Power Receptacle
Back Panel DescriptionSee Figure 2 on page 7
The back panel provides connections for AMand FM antennae, inputs and outputs, andpower. A description of back panel componentsand their functions follows.
Antenna Connections
19 AM AntThe KAV-300r is equipped with one AM loopantenna, which must be attached to the AMantenna screw terminal. See How to InstallAntennae, on page 13.
20 FM AntThe KAV-300r is equipped with one FM dipoleantenna, which must be plugged in to theFM antenna coaxial connector. See Figure 4,Installing the FMAntenna, on page 14, andHow to Install Antennae, on page 13.
Amplifier Channels
21 Right Output22 Left OutputThe KAv-300r is equipped with standard bindingposts for each amplifier channel. These connec-tors accept bare wire, banana plugs, pins, orspade lugs. Use the red terminal for the positiveconnection and the black terminal for the negativeconnection.
Remote Controls
23 12 VDC OutThe 12 VDC (.12 V trigger) output allows theKAV-300r to activate other Krell componentsand other devices that have a 12 Volt triggerinput.
NotesThe 12 VDC output power is limited to 30 ma.
Refer to the owner’s manual of every com-ponent used h~ a custom installation to take fulladvantage of the KA V-3OOr remote capability.
24 RC-5The RC-5 input accepts baseband RC-5 inputcommands from hardwired remote controllers.
Analog Inputs and Outputs
25 Preamp OutThe KAV-300r is equipped with a pair of single-ended preamplifier outputs.
NoteThe amplifier channel outputs are alwaysactive, even when the KAV-3OOr is only beingused as a preamplifier.
26 Tape Out/InThe KAV-300r is equipped with one set of sin-gle-ended tape inputs and outputs via RCA con-nectors.
27 S-3, S-2, S-1, B-1 InputsThe KAV-300r is equipped with three sets (leftand right) of single-ended inputs via RCA con-nectors. The ’KAV-300r is also equipped withone set (left and right) of balanced inputs viaXLR connectors.
Fuses
28 Fuse AGC 12The AGC 12 fuses protect the KAV-300ragainst short circuits in speaker output.
29 Line FuseThe 50/60 Hz line fuse protects the KAV-300ragainst short circuits from the AC power lines.
Krell KAV-300r "
Back Panel Description,See Figure 2 on page 7
con~nued
NoteFuses must be replaced with the fuse valuespecified on the KAV-3OOr back pane/.
Power
30 IEC Power ReceptacleThe KAV-300r is equipped with an IEC powerreceptacle for use with the AC power cord.
Krell KAV-3OOr
FIGURE 3 THE KAV-300r REM()TE CONTROL
31
3435
36
37
38
41
42
32
33
39
40444345
46
Power Functions3t Pwr Key32 Amp/Pre KeyTape Input and Output33 Tape Key
Tuner Functions34 FM Mute Key35 Mon/St Key36 Analog Input Keys37 Tuner Key38 AM/FM Key39 Tune Keys40 Seek Keys41 Prog/Scan Key
Advanced Functions42 A/B/Mem Key43 Rep/Store Key44 Rnd/HFB Key45 Mute Key46 Volume Keys47 Balance Keys
Note: Some keys on the remote control" do not function with the KAV-3OOr,
10 Krell KAV-300r
Remote Control DescriptionSee Figure 3 on page 10
The KAV-300r remote control provides poweron/off, and basic and advanced tuner functions.
BATTERY INSTALLATIONAND REMOVAL
The KAV-300r handheld remote control usestwo AAA-size 1.5 Volt batteries. Batteries areincluded with the shipment.
To install the batteries in the handheld remotecontrol:
1. Remove the backplate by sliding the coverdown.
2. Install the batteries, following the battery posi-tion diagram on the plastic battery receptacle.
3. Replace the backplate.
The remote control is ready for operation.
Replace batteries when remote-control functionbecomes intermittent. Remove batteries if theremote control is not to be used for a long periodof time. Battery leakage can damage the remotecontrol.
A description of the remote control keys andtheir functions follows.
NotesWhen a remote control function key is pressed,the KAV-3OOr blue power LED flashes. Whenthe key is released, the flashing stops.
The CD function keys (CD, track, pause, play,open, stop), and D/A, Dig In, Gain, Phase, andIntro keys are not functional for the KAV-3OOr.
Power Functions
31 Pwr KeyUse this key to turn the KAV-300r on and off.
32 Amp/Pre KeyUse this key to activate the KAV-300r remotecontrol and access receiver commands.
Tape Input and Output
33 Tape KeyUse this key to compare the output signal of athree-head analog tape recorder to the outputsignal of an audio source, when making arecording. The red tape LED illuminates whenthe tape recorder is activated. The red tapeLED does not illuminate when the audio sourceis activated. See Tape Input and Output, onpage 17.
Tuner Functions
The keypad keys access FM mute andmono/stereo functions, analog input sources, andtuner functions. A description of these keys andtheir functions follows.
Note
Keypad numbers 1-6 are active only for pro-gramming and accessing tuner presets. SeeProgramming Presets, on page 17. Keypadnumbers 7-9, O, and +10 are not functional onthe KAV-’3OOr.
34 FM Mute KeyUse this key to turn FM mute on and off. FMmute off allows you to hear FM stations withbroadcast signals not strong enough for clearreception. To turn mute on, press the FM mutekey. Mute on reduces the noise between stationpositions, for better monitoring of audio outputas you tune.
NoteThe tuner display indicates mute on; it does notindicate mute off.
Krell KAV-300r 11
Remote Control Description, continuedSee Figure 3 on page 10
35 MoniSt KeyUse this key to select mono mode (if, for exam-ple, the signal is weak and noisy). The tunerdisplay indicates MONO. A stereo broadcast isautomatically decoded in stereo as long as thesignal is above the stereo switching threshold.Mono/stereo switching in FM is automaticunless mono is selected.
36 Analog Input KeysUse these keys to choose from one balancedXLR source (B-l) and three single-ended RCAsources (S-1, S-2, and S-3).
NoteB-2 and S-4 analog inputs are not func-tional on the KAV-3OOr.
37 Tuner KeyUse this key to select the tuner,
38 AM/FM KeyUse this key to select either AM or FM stationfrequency.
39 Tune KeysUse these keys to move the tuner selec-tion up or down in one-step increments,
40 Seek KeysUse these keys to find the next available AM orFM station frequency.
41 Prog/Scan KeyUse this key to move the tuner selection to thenext available AM or FM station frequency. Thetuner pauses for five seconds, then moves to thenext available station .’To stop the tuner from mov-ing to the next station, press the scan key again.
Advanced Functions
43 Rep/Store KeyUse this key to store a preset selection. SeeProgramming Presets, on page 17.
44 Rnd/HFB KeyUse this key to reduce noise when an FM stationwith weak broadcast signal and high backgroundnoise is selected. Note that some high frequencystereo separation is reduced along with the back-ground noise.
45 Mute KeyUse this key to interrupt the signal of the select-ed input. The red mute LED (16) on the frontpanel illuminates when you press the mute key.
46 Volume KeysUse these keys to adjust the volume of theKAV-300r output (left key decreases volume;right key increases volume). The level LEDs onthe front panel indicate the volume level.
47 Balance KeysUse these keys to shift balance to the left orright in 1 dB increments. The "L" position mutesthe right channel. The "R" position mutes the leftchannel.
When either balance key is pressed, the bal-
ance LED (1.5) illuminates and the volume levelLEDs (17) convert to balance indicators. Thecenter LED remains illuminated, indicating thecenter balance position. As balance is adjustedleft or right, a second LED illuminates, indicat-ing. the modified balance setting.
If the balance has been set off-center, the balanceLED remains illuminated after the adjustment.After five seconds of inactivity or a volume adjust-ment, the level LEDs revert to volume indicators.
42 NB/Mem KeyUse this key to access programmed presets. SeeProgramming Presets, on page 17.
12 Krell KAV-300r
Connecting the KAV-300rto Your SystemTo prevent the introduction of hum or othernoise into the system, organize all wiring neatlybetween the KAV-300r and other system com-ponents and separate AC wires from audiocables.
The KAV-300r uses standard binding posts for
each amplifier, channel. These connectorsaccept bare wire, banana plugs, pins, or spadelugs. Use the red terminal for the positive con-nection and the black terminal for the negativeconnection.
Connect the speaker cables to the left (22)and right (21) amplifier channel output ter-minals located on the back panel.
Connect the left and right outputs of yoursource components to the analog inputs(27) on the KAV-300r.
Plug the AC power cord into the IEC powerreceptacle (30) on the KAV-300r back panel.Plug the remaining end into the AC wallreceptacle. The red stand-by LED (1) on thefront panel illuminates.
The KAV-300r is equipped with one set of bal-anced inputs (B-l) via XLR connectors, three setsof single-ended inputs (S-1, S-2, and S-3) viaRCA connectors, and one tape input and outputloop via RCA connectors. Any balanced or single-ended input may be configured for TheaterThroughput. See Optional Configurations, onpage 18.
Krell recommends using balanced interconnectcables. Balanced interconnect cables can mini-mize sonic loss and are immune to inducednoise, especially for installations using longcables. The balanced connection has 6 dB moregain than single-ended connections. When levelmatching is critical, please keep this specificationin mind.
NotesAll inputs and outputs are labeled on the backpanel Maintain the correct left~right orientation.
Single-ended preamplifier outputs can be usedto simultaneously feed different systems.
HOW TO INSTALL ANTENNAE
FM Indoor Dipole AntennaSee Figure 4 on page 14
An FM indoor dipole antenna and matchingtransformer are included with the KAV-300r.
To connect the FM indoor dipole antenna:
1. Loosen the two screws on the matching trans-former (c).
2. Insert the antenna spade lugs (b) between thescrew heads and the screw.bases (c).
3. Tighten screws to secure the spade lugs.
4. Plug the transformer’s coaxial connector (d)into the F.M Ant coaxial connector (f) on theback panel.
5. Stretch out the antenna wires and move theantenna around to find the best signalstrength and .clarity.
6. Attach the antenna to the wall or other pre-ferred location, such as inside cabinetry.Small nails can be driven through the holesin the plastic caps, located at the end of theantenna wires, to secure the antenna.
Krell KAV-300r 13
FIGURE 4 INSTALLING THE FM ANTENNA
d
ANT
AM ANT
KRELL INDUSTRIES, INC.45 CONNAIR RD.ORANGE, CT 06477-3650USA
1 FM Indoor Dipole Antenna2 Matching Transformer3 Back Panel, KAV-300r
a End Capb Spade Lugsc Screwsd Transformer Coaxial Connectore AM Antenna Screw Terminalf FM Antenna Coaxial Connector
14 Krell KAV-300r
Connecting the KAV-300rto your System, continued
HOW TO INSTALL ANTENNAE,continued
Notes
For optimum tuner reception and performance,use an outdoor FM antenna. The antennaneeds to have good gain and directional char-acteristics, be mounted as high as possibleaway from any large metal objects, and pointtoward the transmitter.
When the outdoor antenna is installed, discon-nect the FM indoor antenna.
AM Loop Antenna
An AM loop antenna is included with theKAV-300r.
NoteThe AM loop antenna must be connected evenwhen an outdoor antenna is installed becausethe AM loop antenna forms part of the AM tun-ing circuit.
To connect the AM loop antenna:
1. Loosen screws on the AM Antenna screwterminal (19) on the back panel.
2. Insert spade lugs between screw heads andscrew bases.
3. Tighten screws to secure spade lugs.
4. Move the AM loop antenna around to findthe best signal strength and clarity.
5. Use the antenna base provided to attach theAM loop antenna to a wall or other location, ifdesired. T, he base can be taped to a surface orscrewed in (screw not provided).
For enhanced AM reception, you can connect asingle connector wire (approximately 20 f~eet) the pole marked AM ANT(19) on the back panelof the KAV-300r. Extend the wire to find thebest signal strength and clarity.
Kretl KAV-300r 15
Receiver Operation
The KAV-300r provides input and preset selec-tion and volume control from the front panel.The remote control provides additional func-tions. Instructions for receiver operation follow.
POWER ON
1. Turn the receiver on by pressing the powerbutton (3) on the front panel or pressing thepwr key (31) on the remote control.
The KAV-300r power supply incorporates aslow start protection circuit that preventsexcessive current from reaching the audiocircuitry upon initial power on. After pressingthe power button (3) or pwr key (31), the stand-by LED (1) on the front panel extin-guishes, and the blue power LED (2) andthe tuner display (5) illuminate. There is short delay, followed by an audible click.This click is the protection oircuitry disen-gaging. The KAV-300r is now ready foroperation.
2. Select a source device either from the frontpanel (13) or using the remote control (36).The source begins to play.
3. Set the volume to a comfortable listeninglevel.
4. When changing sources, lower the volume tooff (18), or mute the output (45). MuteKey, on page 12. This ensures that the nextsource played does not damage your systemwith a high outputtransient.
TUNER FUNCTIONS
Selecting a Station
1. Press the AM/FM button (8) on the frontpanel or the AM/FM key (38) on the remotecontrol to select the desired mode.
2. Select the desired station frequency. Thereare three ways to select a station:
TunemUse these buttons (10) or keys (39)to move the tuner selection up or down inone-step increments.
Seek--Use these buttons (11) or keys (40) find the next available AM or FM stationfrequency.
Prog/ScanmUse this key (41) to move thetuner selection to the next available AM orFM frequency. The tuner pauses for fiveseconds, then moves to the next availablestation. To stop the tuner from moving to thenext station, press the scan key again.
The selected station frequency appears in thetuner display (5) on the front panel.
16 Krell KAV-300r
Receiver Operation, continued
Programming Presets
The KAV-300r has six presets that can be usedto store six AM and six FM stations. To assign astation frequency to a preset:
1. Select the desired AM or FM station fre-quency to be stored, using tune, seek, orscan. The selected station frequencyappears in the tuner display (5).
2. Press and hold the tuner button (9) on thefront panel or rep/store key (43) on theremote control for three seconds. The bluepower LED (2) starts blinking.
3. Press the desired preset button (4) on thefront panel or desired keypad number (1-6)on the remote control. The blue power LEDstops blinking, indicating the preset infor-mation is stored. The station frequencyalong with its assigned I~reset numberappears in the tuner display.
To determinewhich station frequency is assign-ed to a preset, press any preset button on thefront panel, or press the A/B/mem key (42) fol-lowed by the number on the keypad assigned tothe preset. The station frequency that corre-sponds to the preset number appears in thetuner display.
NotesWhen accessing programmed presets using theA/B/mem key (42), you must enter 01 for preset1, 02 for preset 2, and so forth. The preset num-ber does not appear in the tuner display.
Tape Input and Output
The KAV-300r has a discrete tape input andoutput. The tape output is used to send S-1, S-2, S-3, or B-1 to a recording device or proces-sor. You can use the tape feature in two ways:
1. Use the tape input to compare the outputsignal of a three-head analog tape recorderto the output signal of an audio source,when making a recording. To activate thisfunction, select an audio source for record-ing using either the S-1, S-2, S-3, or B-1input selector buttons (13) or. keys (36).Press the tape button (12) or key (33) switch between the tape recorder output(LED illuminated) and the input source (LEDnot illuminated).
2. Use the tape output to create a processorloop, when the KAV-300r is connected to agraphic equalizer or other ancillary equip-ment. To activate this function, connect theequipment to the KAV-300r tape outputs(26) as described in the equipment manu-facturer’s manual. Press the tape button orkey to switch between the processor output(LED illuminated) and the input source (LEDnot illuminated).
NoteWhen changing sources, lower the volume tooff or mute the output, to ensure that the nextSource played does not damage your systemwith a high output transient.
Krell KAV-300r 17
Optional Configurations
CONFIGURING THE KAV-300rFOR THEATER THROUGHPUT
To simplify the integration of an audio/video sur-round sound processor into your system, set anyKAV-300r input (S-1, S-2, S-3, or B-l) to operateas a unity gain stage. Krell calls this configurationTheater Throughput. When you configure aKAV-300r input for Theater Throughput, theKAV-300r volume and balance controls aretransferred to the audio/video surround soundprocessor, for integrated volume and balancemanagement and ease of operation. As long asthe KAV-300r input is configured for TheaterThroughput and connected to the audio/videosurround sound processor’s input configured forTheater Throughput, all KAV-300r volume andbalance adjustments are made through the sur-round sound processor. When you disengagethe KAV-300r input from Theater Throughput,the volume and balance controls revert to theKAV-300r.
How to Activate an Inputfor Theater Throughput
IMPORTANTAlways turn off the source component beforeyou configure any input for Theater Throughput.
1. Turn on the KAV-300r power using the powerbutton (3).
2. Press and hold the button for the input to be.
configured for Theater Throughput, for threeseconds.. The Theater Throughput LED (14)illuminates.
3. Use the corresponding input on the backpanel to connect the KAV-300r to youraudio/video surround sound processor.
IMPORTANTMake sure that the source component is a sur-round sound processor. Other source compo-
nents should not be connected to an input con-figured for Theater Throughput. Doing so canresult in excessive and possibly damaging vol-ume levels when the source is played. Alwaysturn off the source component before you con-figure any input on the KA V-3OOr for TheaterThroughput.
How to Disengage an Inputfor Theater Throughput
1. Turn on the KAV-300r power using thepower button (3).
Press and hold the button that corresponds tothe input configured for Theater Throughput,for three seconds.
3. Theater Throughput is disengaged when theTheater Throughput LED (14) turns off.
PREAMPLIFIER OUTPUT
The KAV-300r is equipped with a pair of single-ended preamplifier outputs (25). These outputsallow the KAV-~ 300r to be used as a preamplifi:er when it is connected to a separate amplifier.
NoteThe amplifier channel outputs are alwaysactive, even when the KAV-3OOr is only beingused as a preamplifier.
ADJUSTING CONTRAST ANDBRIGHTNESS OF THE TUNERDISPLAY
The contrast and brightness of the tuner display(5) can be adjusted using the screws located the underside of the KAV-300r unit. To increasetuner display contrast, turn the screw closest tothe KAV-300r front edge.clockwise. To increasetuner display brightness, turn the screw furthestfrom the front edge counterclockwise. Use thetrimmer adjustment tool provided.
18 Krell KAV-300r
How to TroubleshootSystem Noise
Questions and Answers
AC grounding becomes critical when connect-ing high performance audio components. Whenyou mix and match audio components, eachwith its own ground potential, a low frequencyhum may occur in one or both speakers. Thisoften occurs when connecting new componentsinto a system.
If a low frequency hum emanates from thespeakers when you place the KAV-300r intothe system, follow these simple troubleshootingsteps before contacting your authorized Krelldealer, distributor, or Krell.
1. Check all input and output connections,making sure they are of sound construction.With the receiver off, remove the intercon-nect cables, then turn the receiver on. If thehum disappears, turn the receiver off andreinsert one of the interconnect cables. Turnthe receiver back on. If the hum reappearswith one or both interconnects inserted,there may be a defective cable. Have theinterconnect cables checked before pro-ceeding.
2. If the interconnects prove to be sound, youmay be experiencing a ground loop. Pleasecontact your authorized Krell dealer, distrib-utor, or Krell for suggestions on how tosolve this problem.
See Placement, on page 3, for information aboutelectromagnetic radiation that can cause noiseand interference.
Q. When I turn up the volume on the KAV-300r,there is a loud hum from the loudspeakers; whatcould it be?
A. Hum can be caused by several different dis-turbances. Check to make sure all cables intoand out of the KAV-300r are sound and makingproper contact. Also make sure there are nopower supplies or hum inducing components ontop of or directly below the KAV-300r. Anotherpossible source of hum could be a ground loop inthe system. Please contact your authorized Krelldealer, distributor, or Krell for suggestions onsolving this problem.
Q. When I select the B-1 input on the KAV-300r,one channel seems to have less gain than theother. Is something wrong with the preamplifier?
A. First check the balance LEDs. If the balancehas been set off center, the red balance LEDs leftor right of center remain illuminated after theadjustment. See Balance Keys (4F), on page 12.
Next, check the input cables. Locate the channelof the system that appears to have less gain.Switch that channel’s input cables. If the problemnow appears in the other channel, the cable isdefective. If the problem remains in the originalchannel, check the KAV-300r output Cablesusing the ’same procedure. If the difference ingain is not cable related, call your authorizedKrell dealer, distributor, or Krell.
Q. When I use my surround sound processor,where should I set the volume on the KAV-300r?
A. The volume level control on the KAV-300r isnot active in Theater Throughput mode. Whenusing the KAV-300r Theater Throughput feature,system volume control is regulated by your sur-round sound processor. See. Configuring theKAV-3OOr for Theater Throughput, on page18.
Krell KAV-300r 19
Warranty
This Krell product has a limited warranty of five years forparts and labor on circuitry. Should this product fail to per-form at any time during the warranty, Krell will repair it at nocost to the owner, except as set forth in this warranty.The warranty does not apply to damage caused by acts ofGod or nature.
The warranty on this page shall be in lieu of any other war-ranty, expressed or implied, including, but not limited to, anyimplied warranty of merchantability or fitness for a particularpurpose. There are no warranties which exceed beyondthose described in this document. If this product does notperform as warranted herein, the owner’s sole remedy shallbe repair. In no event will Krell be liable for incidental or con-sequential damages arising from purchase, use, or inabilityto use this product, even if Krell has been advised of thepossibility of such damages.Proof of purchase in the form of a bill of sale or receiptedinvoice substantiating that the unit is within the warrantyperiod must be presented to obtain warranty service. Thewarranty begins on the date of retail purchase, as noted onthe bill of sale or receipted invoice from an authorized Krelldealer or distributor.
The warranty for Krell products is valid o.nly in the country towhich they were originally shipped, through the authorizedKrell distributor for that country, and at the factory. Theremay be restrictions on or changes to Krell’s warrantybecause of regulations within a specific country. Pleasecheek with your distributor for a complete understanding ofthe warranty in your country.If a unit is serviced by a distributor who did not import theunit, there may be a charge for service, even if the productis within the warranty period.
Freight to the factory is your responsibility. Return freightwithin the United States (U.S.A.) is included in the warranty.If you purchased your Krell product outside the U.S.A. andwish to have it serviced at the factory, all freight and associ-ated charges to the factory are your responsibility.
Krell will pay return freigl~t to the U.S.A.-based freight for-warder of your choice. Freight and other charges to ship theunit from the freight forwarder tO you are also your respon-sibility.
Krell is not responsible for any damage incurred in transit.Krell will file claims for damages as necessary for units dam-aged in transit to the factory. You are responsible for filingclaims for shipping damages during the retum shipment.Krell does not supply replacement parts and/or products tothe owner of the unit. Replacement parts and/or productswill be furnished only to the distributor performing service onthis unit on an exchange basis only; any parts and/or prod-ucts returned to Krell for exchange become the property ofKrell.
No expressed or implied warranty is made for any Krellproduct damaged by accident, abuse, misuse, natural-orpersonal disaster, or unauthorized modification.
Any unauthorized voltage conversion, disassembly,component replacement, perforation of chassis,updates, or modifications performed to the unit willvoid the warranty.
The operating voltage of this unit is determined by the fac-tory and can only be changed by an authorized Krell distrib-utor or at the factory. The voltage for this product in theU.S.A. cannot be changed until six months from the originalpurchase date.
In the event that Krell receives a product for warranty ser-vice that has been modified in any way without Krell autho-rization, all warranties on that product will be void. The prod-uct will be returned to original factory layout specifications atthe owner’s expense before it is repaired. All repairsrequired after the product has been returned to original fac-tory specifications will be charged to the customer, at cur-rent parts and labor rates.
All operational features, functions, and specifications andpolicies are subject to change without notification.
To register your product for warranty benefits,complete and return the Warranty Registra-tion Card enclosed in the shipping box within15 days of purchase. Thank you.
2O Krell KAV-300r
Krell Industries, Inc.
45 Connair Road
Orange, CT 06477-3650 USA
TEL 203-799-9954 FAX 203-891-2028
E-MAIL krell @ krellonline.com
WEBSITE www.krellonline.com
Specifications
KAV-300rStereo Receiver
Integrated AmplifierFREQUENCY RESPONSE
1 Hz to 100 kHz +0 dB, -3.0 dB
SIGNAL TO NOISE RATIO"A" WEIGHTED
95 dB
GAIN
36.1 dB
INPUT IMPEDANCE
210 kOhms
OUTPUT POWEREACH CHANNEL DRIVEN
8 Ohms 150 W
4 Ohms 300 W
POWER CONSUMPTION
Idle 50 W
Max. . 600 W
INPUTS
1 pair balanced via XLR connectors3 pair single-ended via RCA connectors
OUTPUTS1 pair speaker outputs via five-way binding posts1 pair single-ended preamplifier outputsvia RCA connectors
TAPE MONITOR
1 pair each single-ended inputs and outputsvia RCA connectors
REMOTE CONTROL
1 handheld wireless infrared
112 VDC Out (12 V trigger)via a 3.5 mm mini connector
1 RC-5 remote control inputv=a a DO power connector
DIMENSIONS
19.0w x 3.7h x 14.7d in.
48.3w x 9.4h x 37.3d cm
WEIGHT
Shipping .35 lb., 15.9 kg
Unit only- 27 lb., 12.3 kg
All operational features, functions, specifications, arid poli-cies are subject to change without notification.
Tu nerTOTAL STATION PRESETS
6 FM, 6 AM
FM Tuner SpecificationsSIGNAL STRENGTH FOR 50 dB QUIETINGMONO/STEREO
15/28 dBf
TOTAL HARMONIC DISTORTION (THD)MONO/STEREO
1 kHz and100% Modulation 0.3, 0.5°/o-
ANTENNA INPUTUNBALANCED
300 Ohms
CHANNEL SEPARATION
1 kHz 36 dB
AM SUPPRESSION
55 dB
CAPTURE RATIOWIDE
1.5
ALTERNATE CHANNEL SELECTIVITYWIDE
60 dB
ADJACENT CHANNEL SELECTIVITYWIDE
13 dB
FREQUENCY RESPONSE15 Hz to 15 kHz +0 dB, -1.0 dB
AM Tuner SpecificationsSIGNAL TO NOISEMAXIMUM
50 dB
ANTENNA INPUTUNBALANCED
75 Ohms
with Theater Throughput
v00,1
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