Krell Industries KAV-250p User's Manual
Contents
1. ume control indicators If the Balance has been set to an off center position the Balance led will remain lit after the adjust ment period If returned to a centered Balanced position the Balanced led will extinguish after the adjustment period MUTE front panel only Press the input button of the active source to mute the output Page 6 of 12 English UNMUTE front panel only Press the input button of the active source again to unmute the input If the active source is changed while the KAV 250p is muted press the input button of the new active source a second time to unmute the KAV 250p MUTE remote control only Press the mute button of the remote to mute the output of the active source UNMUTE remote control only Press the mute button of the remote to unmute the output of the active source NOTE When the mute led on the KAV 250p is illuminated there is no signal output B 1 Selects the B 1 input S 1 Selects the S 1 input S 2 Selects the S 2 input S 3 Selects the S 3 PR input TAPE Engages the tape monitor Battery Installation and Removal NOTE Batteries should be replaced when functions from the remote control become intermittent The KAV 250p remote uses two AAA size 1 5 volt batteries 1 Remove the backplate to expose the batteries Remove the old batteries 3 Install the new batteries following the battery position diagram on the plastic battery receptacle 4 Re ins2. ASL KAV 250p The Leader in Audio Engineering Instructions for Use Owner s Reference KAV 250p Preamplifier Page INTRODUCTION 3 UNPACKING 3 PLACEMENT 3 AC Power Guidelines 4 CONNECTING THE KAV 250p TO YOUR SYSTEM 45 Connair Road Inputs Orange CT 06477 3650 USA Outputs Connecting the KAV 250p Additional Connections TE AOAR PREAMPLIFIER AND REMOTE FAX 203 799 9796 CONTROL OPERATION Battery Installation and Removal OPTIONAL CONFIGURATIONS WARRANTY RETURN AUTHORIZATION PROCEDURE 10 SPECIFICATIONS 12 Krell Industries Inc aot amp fs E MAIL krell krellonline com O oO OO ILLUSTRATIONS Page REMOTE CONTROL 7 S 3 PR OPTIONAL INPUT CONFIGURATION 8 1997 by KRELL Industries Inc All rights reserved P N 19608 0240 0000 CE Marking This product complies with the EMC direc tive 89 336 EEC and the low voltage directive 73 23 EEC Introduction Thank you for your purchase of the Krell KAV 250p To obtain the best performance from your KAV 250p preamplifier pay care ful attention to its placement installation and operation A thorough understanding of these details will help insure satisfactory operation and long life for the KAV 250p and related system components THERE ARE NO USER SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT Please contact your authorized dealer distributor or Krell if you have any questions not addressed in this re
3. Monday Friday 9 00 AM to 5 00 PM EST FAX 203 799 9796 E MAIL krell krellonline com KAV 250p PRODUCT SERIAL NUMBER To register your product for warranty benefits complete and return the Warranty Registration Card enclosed in the shipping box within 15 days of purchase KRELL KAV 250p Krell Industries Inc 45 Connair Road Orange CT 06477 3650 USA TEL 203 799 9954 FAX 203 799 9796 E MAIL krell krellonline com Specifications FREQUENCY RESPONSE 5Hz 132KHz 0 3dB SIGNAL TO NOISE A WEIGHTED 105dB DISTORTION lt 0 007 THD 20Hz 20KHz INPUT TO OVERLOAD 10 3 Vrms GAIN 12dB balanced INPUT IMPEDANCE 160K ohms OUTPUT IMPEDANCE 15 ohms POWER CONSUMPTION 35 Watts INPUTS 1 pair balanced via XLR connectors 3 pairs single ended via RCA connectors 1 single ended tape input via RCA connectors KAV 250p OUTPUTS 1 pair balanced via XLR connectors 1 pair single ended via RCA connectors 1 single ended tape output via RCA connectors REMOTE CONTROL Wireless infrared DIMENSIONS 19w x 3 5h x 15 5d in 48 3w x 8 9h x 39 4d cm WEIGHT Shipping 17 lbs 7 7 kg Unit only 13 Ibs 5 9 kg All operational features functions specifications and policies are subject to change without notification
4. The XLR input pin configuration is described below Pin 1 Ground Pin 2 Non inverting 0 Pin 3 Inverting 180 Outputs Outputs include one pair single ended output via RCA connectors one single ended tape output via RCA connectors and one pair bal anced output via XLR connectors Both RCA and XLR outputs are active at all times allowing simultaneous connections to sepa rate amplifiers or separate systems Do not connect both outputs to a single stereo ampli fier at one time KRELL KAV 250p Connecting the KAV 250p The left and right channel RCA and balanced inputs and outputs are labeled on the back plate Maintain the correct left right orienta tion 3 To prevent the introduction of hum or other noise into the system organize all wiring between the KAV 250p and other system components neatly Separate AC wires from audio cables 1 Connect the left and right outputs of your source components to the inputs on the KAV 250p 2 Connect the output of the KAV 250p to the input of your power amplifier Krell recommends the use of balanced interconnects Balanced interconnects not only have the ability to minimize sonic loss but also have immunity to induced noise especially for installations using long cable lengths Balanced connections have 6dB more gain than single ended connections When level matching is critical keep this specification in mind Additional Connections RC 5 IN This in
5. The preamplifier is now ready for operation 2 Choose a listening source and select that input either manually or via the remote control 3 Start play of the source 4 Set the volume to a comfortable listen ing level 5 When changing sources lower the vol ume to the Off position or Mute the out put see Mute on page 6 This insures English Page 5 of 12 that the next source played will not dam age your system with a high output tran sient A description of the buttons on the KAV 250p and the KAV 250p remote is provided below PWR Power On Off Button AVOLUME Raises volume WVOLUME Lowers volume 4L Bal R remote control only Shifts the balance to the left in 1dB incre ments The L position mutes the right channel gt L Bal R remote control only Shifts the balance to the right in 1dB incre ments The R position mutes the left chan nel BALANCE and LEVEL When either the L or the R on the Balance control button is pressed on the remote the Balance led on the KAV 250p will illuminate and the volume control leds convert to a Balance control indicator The center led Level will always remain dimly illuminated indicating the center balance position As balance is adjusted either left or right another more brightly lit led illumi nates to indicate the now modified balance setting After 5 seconds of inactivity or a vol ume adjustment the leds revert back to vol
6. ceplate directly in back of the KRELL logo The factory default setting is shown in Figure 1 below Remove the jumper from the S 3 side and place it on the side labeled proc as shown in Figure 2 below 4 Place the top cover back on the KAV 250p and insert the cover screws 5 Plug the KAV 250p back into the AC out let Figure 2 S 3 PR configured for Theater Throughput Input Configure KRELL KAV 250p Warranty This Krell product has a limited warranty of five years for parts and labor on circuitry Should this product fail to per form 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 including but not limited to any implied warranty of merchantability or fitness for a particular purpose There are no warranties which exceed beyond those described in this document If this product does not perform as warranted herein the owner s sole remedy shall be repair In no event will Krell be liable for incidental or consequential damages arising from pur chase 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
7. fer ence manual KRELL KAV 250p Unpacking 1 Open the box and remove the top layer of foam You will see these items 1 KAV 250p KAV 250p remote control T 10 Torx wrench AC power cord packet containing the Owner s Reference and the Warranty Registration Card NOTE If any of these items are not includ ed please contact your authorized Krell dealer or distributor immediately for assis tance 2 Carefully remove the unit and acces sories from the box Remove the protec tive plastic wrap from the unit NOTE Save all packing materials If you must ship your KAV 250p in the future repack the unit in its original packaging to prevent transit damage Placement WARNINGS The preamplifier must not be located where it could be exposed to dripping or splashing fluids Before you install the KAV 250p into your system review the following guidelines to choose the location for the KAV 250p This will facilitate a clean trouble free installation The KAV 250p does not require any type of special rack or cabinet for installation For the dimensions of the KAV 250p see Specifi cations on page 12 English Page 3 of 12 Placement continued Place the KAV 250p on a firm level sur face away from excessive heat humi dity or moisture Other components may be placed on or around the KAV 250p since the KAV 250p is not particularly hum sensi tive You may experiment with feet or cone
8. must be presented to obtain warranty service The warranty begins on the date of retail purchase as noted on the bill of sale or receipted invoice from an authorized Krell dealer or distributor The warranty for Krell products is valid only in the country to which they were originally shipped through the author ized Krell distributor for that country and at the factory There may be restrictions on or changes to Krell s warran ty because of regulations within a specific country Please check with your distributor for a complete understanding of the warranty in your country i if a unit is serviced by a distributor who did not import the unit there may be a charge for service even if the product is within the warranty period Freight to the factory is your responsibility Return freight within the United States U S A is included in the warran ty If you 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 KAV 250p Krell will pay return freight to the U S A based freight for warder of your choice Freight and other charges to ship the unit 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 damaged in transit to the factory You are responsible for fil ing claims for shippi
9. ng damages during the return ship ment 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 prop erty 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 voitage conversion disassembly component replacement perforation of chassis updates or modifications performed to the unit will void the warranty The operating voltage of this unit is determined by the fac tory and can only be changed by an authorized Krell dis tributor 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 serv ice that has been modified in any way without Krell author ization all warranties on that product will be void The prod uct 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 fac tory specifications will be charged to the customer at cur rent parts and labor rates All operational features functions and specifications and p
10. olicies are subject to change without notification To register your product for warranty benefits please complete and return the Warranty Registration Card enclosed in the shipping box within 15 days of purchase Thank you English Page 9 of 12 Return Authorization Procedure IMPORTANT If you believe there is a prob lem with your unit please contact your deal er distributor or the Krell factory immedi ately Do not return any unit to KrelP for repair without first discussing the problem and obtaining a Return Authorization Number To return a product the owner is required to WE Obtain a Return Authorization Number R A number and shipping address from the Krell Service Department WE Insure and accept all liability for loss or damage to the product during shipment to the Krell factory and prepay all ship ping charges The product may also be hand delivered if arrangements with the Service Department have been made in advance Proof of purchase may be re quired for warranty validation at the tim of hand delivery m Use the original packaging to insure the safe transit of the product to the factory dealer or distributor The use of any packaging material other than the original packaging materials is not recommend ed Krell may at its discretion return a product in new packaging and bill the owner for such packaging if the product received by Krell was boxed in non standard packaging or if
11. put accepts baseband RC 5 input commands from various remote devices facilitating custom installations The input allows the KAV 250p to be controlled via hard wired signals sent from such units 12 VDC REMOTE POWER OUT These outputs send 12 volt power on off signals to other Krell components as well as to other devices that incorporate a 12 volt power on off trigger input This allows for remote turn on off of other components when the KAV 250p is powered on off KRELL KAV 250p NOTE Consult the owner s reference of any device used in a custom installation to take full advantage of the remote capability of the KAV 250p Preamplifier and Remote Control Operation The KAV 250p provides input selection and volume control from the front panel The KAV 250p remote provides complete pre amplifier functions as well as Krell CD trans port and power amplifier remote functions NOTE Not all buttons on the remote control function with the KAV 250p Press the Amp Pre button on the remote to access preamplifier commands NOTE When a function button on the remote control is pressed the blue pilot led will flash on the KAV 250p When the but ton is released the flashing stops 1 Engage the power switch on the KAV 250p either manually or using the remote control After pressing the power switch the red Stand by led on the KAV 250p will turn off and the blue Power led on the KAV 250p will illumi nate
12. s as long as they are not permanently affixed to the chassis Any unauthorized modifications to the electronics or chassis will void the war ranty AC Power Guidelines WARNING Do not remove or bypass the ground pin on the end of the AC cord This may cause RFI radio frequency interference to be induced into your playback system The KAV 250p has superb regulation and does not require a dedicated 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 can be used if they are grounded Page 4 of 12 English Connecting the KAV 250p to Your System WARNING When making connections to this compo nent or any other make sure the power amplifier is Off and the KAV 250p is in the Mute or Stand by mode Make sure all cable terminations are of the highest quality free from frayed ends shorts or cold solder joints Inputs The KAV 250p is equipped with three pairs of single ended inputs via RCA connectors S 1 S 2 and S 3 PR one single ended tape input via RCA connectors Tape and one pair balanced input via XLR connectors B 1 The S 1 and S 2 inputs are standard single ended inputs The S 3 PR has a user configurable option The S3 PR input is set as a Standard input from the factory and it may be set for use as a Surround processor throughput See Optional Configurations on page 8
13. tall the backplate 5 Check to make sure the remote control is functioning properly See Optional Configurations on page 8 l KRELL KAV 250p THE KAV 250p REMOTE CONTROL Press this button to access preamplifier commands P aa a Fa Ca KRELL KAV 250p English Page 7 of 12 Optional Configurations S 3 PR For simplified integration of an A V surround sound processor the S 3 PR input can be set to operate as a unity gain stage n this Theater Throughput mode when the S 3 PR input is selected the volume and balance controls of the KAV 250p are dis abled Volume control is transferred from the KAV 250p to the A V surround sound processor connected to the S 3 PR input The left and right channel volume settings become independent from the volume con trol of the KAV 250p and the overall system level is determined exclusively by the A V surround sound processor NOTE The factory default position sets the S 3 PR input as a standard input FIGURE 1 S 3 PR configured as a standard input Input Configure English Page 8 of 12 S 3 PR OPTIONAL INPUT CONFIGURATION To enable this option it is necessary to remove the top cover of the KAV 250p 1 Unplug the KAV 250p from the AC out let 2 Remove the KAV 250p top cover screws with the supplied T 10 Torx wrench Lift the cover from the KAV 250p 3 Find the section labeled Input Configure located behind the fa
14. 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 Page 10 of 12 English please contact your authorized Krell dealer distributor or the Krell Service Department for assistance Krell is not responsible for any damage incurred in transit Krell will file claims for damages as necessary for products dam aged in transit to the factory The owner is responsible for filing claims for shipping dam ages that occur during the return shipment Replacement parts and or products will be furnished 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 In the event that Krell receives a product for warranty service which has been modi fied in any way without Krell authorization all warranties on that product will be void The product will be returned to original fac tory layout specifications at the owners expense before it is repaired All repairs required after the product has been returned to original factory specification will be charged to the customer at current parts and labor rates To contact the Krell Service Department TEL 203 799 9954
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