Krell Industries KAV280p User's Manual
Contents
1. 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 1 Turn on the KAV 280p power 2 Press and release the button 5 for the device you wish to dis engage from Theater Throughput The LED illuminates 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 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 to2. 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 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 Definition of Terms CONFIGURATIONS INPUT AND OUTPUT CONNECTIONS OPERATION Following are the definitions of key terms used in your owner s ref erence manual Theater Throughput Theater Throughput is a Kre
3. 280p Ol LL Ke dsi q jaued 10044 LL qouy 9497 OL suonounJ jueunsn py euinjoA agl INN 6 uong sin 8 s10 291pu PON qan ede 7 uong ede 9 sq31 pue suonng g pue S S Z S S S saoiaeg Boleuv Josues peJeJlu aqq g pueis Q31 48Mod Z uollng JeMOd 1 MOd dosc Av gt DSSS O AG ONVLS Jeued 1uo44 dogz AV PUL L ainbl4 Front Panel Description See Figure 1 on page 5 Front Panel Functions POWER ANALOG SOURCE COMPONENTS The front panel of the KAV 280p accesses power on and off analog input selections volume control and mute The front panel display shows the volume and balance levels and Theater Throughput status 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 5 S 1 S 2 S 3 and B 1 Buttons and LEDs Use
4. KAV 280p Remote Control Description See Figure 3 on page 11 Battery The KAV 280p remote control uses one CR2025 lithium battery Installation which is included with the shipment and To open the battery compartment on the back of the remote Removal control 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 Note Do not use a knife or other sharp objects to open the battery compart ment they will scratch the remote control finish 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 Notes Replace battery when remote control function becomes intermittent Remove battery if the remote control is not used for a long period of time Battery leakage can damage the remote control Remote Control The KAV 280p remote control accesses all preamplifier functions Functions A description of the remote control keys that activate the KAV 280p follows 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
5. 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 pr
6. distributor or Krell if you have any ques tions not addressed in this reference manual This product is manufactured in the United States of America Krell is a registered trademark of Krell Industries Inc and is restricted for use by Krell Industries Inc its subsidiaries and authorized agents Krell Current Mode and Theater Throughput are trademarks of Krell Industries Inc All other trade marks and trade names are registered to their respective companies 2002 by Krell Industries Inc All rights reserved P N 306429 Contents Page INTRODUCTION 1 DEFINITION OF TERMS 2 UNPACKING 3 PLACEMENT 4 AC Power Guidelines 4 FRONT PANEL DESCRIPTION 6 BACK PANEL DESCRIPTION 9 REMOTE CONTROL DESCRIPTION 12 Battery Installation and Removal 12 Remote Control Functions 12 CONNECTING THE KAV 280p TO YOUR SYSTEM 15 Connection Steps 15 OPERATING YOUR KAV 280p 16 Preamplifier Operation 16 Tape Input and Output 17 CONFIGURING THE KAV 280p FOR THEATER THROUGHPUT 19 HOW TO TROUBLESHOOT SYSTEM NOISE 20 QUESTIONS AND ANSWERS 21 WARRANTY 22 RETURN AUTHORIZATION PROCEDURE 23 SPECIFICATIONS Back Cover Krell KAV 280p iii Illustrations Page FIGURE 1 The KAV 280p Front Panel FIGURE 2 The KAV 280p Back Panel FIGURE 3 The KAV 280p Remote Control 11 Krell KAV 280p Introduction Krell KAV 280p Thank you for your purchase of the Krell KAV 280p Remote Control Preamplifier The KAV 280p uses current mode and sur
7. 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 Krell KAV 280p Front Panel Description continued MODE INDICATORS VOLUME ADJUSTMENT FUNCTIONS Krell KAV 280p 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 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 disp
8. 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 Krell KAV 280p Definition of Terms continued TECHNOLOGY Unpacking 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 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 1 Open the shipping box and remove the top layer of foam The following items are visible 1 KAV 280p Remote Control Preamplifier 1 Accessory Kit containing 1 AC power cord 1 12 VDC 12 V trigger cable 1 KAV 280p remote control 1 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 Notes Krell KAV 280p If any of these items are not included please contact your authorized Krell dealer Save all packing mater
9. CA 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 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 Back Panel Description continued BACK PANEL REMOTE CONNECTIONS continued Notes POWER 17 12 VDC In 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 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 f
10. ED CONNECTIONS Connection Steps Note Krell KAV 280p 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 1 Make sure all power sources and components are off before connecting inputs and outputs 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 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 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
11. KRELL KAV 280p Remote Control Preamplifier THE LEADER IN AUDIO ENGINEERING Instructions for Use Owner s Reference KAV 280p Remote Control Preamplifier Instructions for Use v 02 0 CONTACT INFORMATION WARNINGS 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 http www krellonline com C This product complies with the EMC directive 89 336 EEC and the low voltage directive 73 23 EEC Do not place the preamplifier where it could be exposed to dripping or splashing The ventilation grids on the top and bottom of the KAV 280p must be unob structed at all times during operation Do not place flammable material on top of or beneath the component Do not remove or bypass the ground pin on the end of the AC cord This may cause FFI radio frequency interference to be induced into your playback sys tem When making connections to this or any other component make sure all compo nents are off Turn off all systems power before connecting the KAV 280p to any other component Make sure all cable terminations are of the highest quality free from frayed ends short circuits or cold solder joints When the line fuse needs to be replaced use the spare fuse provided Unplug the component before replacing the fuse THERE ARE NO USER SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT Please contact your authorized dealer
12. S 2 and S 3 inputs can be configured for Theater Throughput See Configuring the KAV 280p for Theater Throughput on page 19 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 Connecting the KAV 280p to Your System continued Pin assignments for the XLR connectors Additional Connections Note Pin 1 Shield ground Pin 2 Non inverting hot 0 Pin3 Inverting cold 180 RC 5 IN 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 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 Krell KAV 280p Operating Your KAV 280p Preamplifier Operation This section provides
13. always turn amplifiers on last When powering down always turn amplifiers off first Operating Your KAV 280p continued Tape Input and Output Note The KAV 280cd 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 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 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 When changing sources lower the volu
14. ials If you must ship your KAV 280p in the future repack the unit in its original packaging to prevent shipping damage 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 AC Power The KAV 280p has superb regulation and does not require a dedi Guidelines 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 The KAV 280p should be operated only with the power cord supplied 4 Krell KAV
15. 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 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 Note When you press a function key on the remote the blue power LED 2 will flash 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 Note Krell KAV 280p When powering up any system
16. lay shows volume levels balance levels and Theater Throughput status sindino peouejeg 1uDiH pue ye 71 sindino pepue ejBurs jy6iy pue ye1 9 sindino ede 1uBii pue je SI sindino Bojeuy JoJDaUUOD O3l LZ Jepjouesn4 pue esny eur oz sindu ede 1u6i4 pue ye PL J9MOd sindu amp ojeuy pepue ejBurs jy6iy pue ye1 L Ul S OH 6L sindu Boyeuy u pu INO OQA ZL 8L peouejeg 1uDiu pue ye1 ZL suonoS uuoo loui tu s ndu Bbojeuy ko Oc 6L LL 9L SL vl L eL NIVIN lo lanes eerie A Ja ujilcitue ci z lt zH 09 09 E aro Q dOgag AWv M ce Y Jeued xyoeg d08Z AVM PUL Z enDi J Back Panel Description See Figure 2 on page 8 Back Panel Functions ANALOG INPUTS ANALOG OUTPUTS BACK PANEL REMOTE CONNECTIONS Krell KAV 280p The KAV 280p back panel provides connections for all inputs and outputs power on off and additional remote connections 12 Left and Right Balanced Analog Inputs The KAV 280p is equipped with one pair of balanced B 1 inputs via XLR connectors 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 The KAV 280p is equipped with a pair of single ended tape outputs via R
17. ll 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 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 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
18. me to off or mute the output This ensures that the next source played does not damage your system with a high output transient Krell KAV 280p Configuring the KAV 280p for Theater Throughput How to Activate an Input 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 2 Press and release the button 5 for the device you wish to configure for Theater Throughput The LED illuminates 3 Press the button again and hold it for four seconds The word thr appears on the front panel display 11 IMPORTANT How to Disengage an Input for Theater Throughput Krell KAV 280p
19. ns All operational features functions FREQUENCY RESPONSE specifications and policies are 20 Hz 20kHz O dB 0 04 dB subject to change without i 0 2 Hz 300 kHz 0 3 dB notification SIGNAL TO NOISE RATIO gt 98 dB A weighted gt 90 dB wideband TOTAL HARMONIC DISTORTION THD 20 Hz 20 kHz 0 00496 GAIN 6 2dB single ended output 12 3dB balanced output OUTPUT 9 Vrms single ended output 18 Vrms balanced output INPUT IMPEDANCE 43 kOhms single ended input 86 KOhms balanced input OUTPUT IMPEDANCE 120 Ohms single ended output 240 Ohms balanced output POWER CONSUMPTION 22W stand by 25W on INPUTS ALL INPUTS MAY BE SET UP FOR THEATER THROUGHPUT 1 pair balanced via XLR connectors 3 pair single ended via RCA connectors OUTPUTS 1 pair balanced via XLR connectors 1 pair single ended via RCA connectors TAPE INPUT AND OUTPUT 1 pair single ended via RCA connectors REMOTE CONTROL 1 handheld wireless remote 112 VDC Out In 12 V trigger 1 RC 5 input via a DC power connector DIMENSIONS 17 3w x 3 5h x 17 3d in 43 8w x 8 9h x 43 8d cm WEIGHT Shipping 22 0 Ib 10 0 kg Unit only 16 0 Ib 7 3 kg
20. oduct 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 facto
21. put 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 When I use the KAV 280p s Theater Throughput capability with my surround sound processor where should set the volume on the KAV 280p 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 21 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 22 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 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
22. rom hardwired remote controllers 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 Note 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 20 IEC Connector The connector is for use with the provided IEC standard 15 amp power cord Krell KAV 280p Figure 3 The KAV 280p Remote Control Power 22 Power Key 23 Pre Key 22 Analog Functions 24 Analog Input Keys 25 Tape Key Output Control Functions 26 Mute Key 27 Vol Volume Keys 28 Bal Balance Keys 28 8 0 o U 3 J O 010 0 lt A 4 e 3 o A n V V 4 QUI L Bal HR Note 0 Li o S Rep D I T D D J HORO Phase 25 s 4 s 3 s 4 24 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
23. ry 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 Krell KAV 280p Return Authorization Procedure HOW TO EXPEDITE SERVICE HOW TO RETURN A PRODUCT 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 http www krellonline com To contact the Krell Service Department TEL 203 799 9954 Monday Friday 9 00 am to 5 00 pm EST FAX 203 799 9796 E MAIL service krellonline com WEBSITE http www krellonline com To return a product to Krell please follow this procedure so that we may ser
24. switch the KAV 280p between the stand by and the operational modes 12 Krell KAV 280p Remote Control Functions continued POWER continued ANALOG FUNCTIONS OUTPUT CONTROL FUNCTIONS Krell KAV 280p 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 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 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
25. 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 Questions and Answers Q Should leave my KAV 280p on all the time A Krell KAV 280p 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 When turn on the amplifier there is a loud hum through the loudspeakers What should do When a new component is introduced into a system a low frequency hum may occur in one or both loudspeakers Check all input and out
26. 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 Remote Control Functions continued Analog Functions continued To access and display balance push either the L or the R bal 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 Fou 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 Krell KAV 280p Connecting the KAV 280p to Your System USING BALANC
27. ve 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 HOW TO PURCHASE ADDITIONAL PACKING SERIAL NUMBER Krell KAV 280p 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 To purchase additional packaging please contact your authorized Krell dealer distributor or the Krell Service Department for assis tance Your KAV 280p product serial number is 23 Krell Industries Inc KAV 280p 45 Connair Road Remote Control Orange CT 06477 3650 USA en Preamplifier TEL 203 799 9954 FAX 203 891 2028 v 02 0 E MAIL krell krellonline com WEB SITE www krellonline com Specificatio
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