Krell Industries KAV-1500 User's Manual
Contents
1. and specifications and policies are subject to change without notification To register your product for warranty benefits complete and return the Warranty Registration Card enclosed in the shipping box within 15 days of purchase Thank you Krell KAV 1500 Amplifier 21 Return Authorization Procedure If you believe there is a problem with your component please contact your dealer dis tributor 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 KAV 1500 PRODUCT NAME SERIAL NUMBER 22 To return this product to Krell please follow this procedure so that we may serve you better 1 Obtain a Return Authorization Number R A number and shipping address from the Krell Service Department 2 Insure and accept all liability for loss of or damage to this product during ship ment to the Krell factory and prepay all shipping charges Please see the Warranty page in this manual concern ing liability for shipping damage and shipping charges This product may also be hand delivered if arrangements with the Service Departme2. ended or balanced inputs at the same time 4 Connect the loudspeaker cables to the KAV 1 500 amplifier channel output speaker binding posts 14 15 16 17 18 located on the back panel The amplifier channel outputs for the KAV 1500 use five way loudspeaker binding _ posts The loudspeaker binding post terminals accept spade lugs bare wire banana plugs or pins Use the red terminal for the positive connection and the black terminal for the negative connection 5 Plug the end of the AC power cord into the AC outlet The amplifier is now ready for operation See Amplifier Operation on page 19 10 Krell KAV 1500 Amplifier The KAV 1500 amplifier is shipped with shorting pins in the XLR inputs These pins should remain in the XLR inputs if the amplifier is operating in the single ended mode When the shorting pin is inserted pins 1 lower left and 3 top are shorted together Remove the shorting pins to connect the amplifier for balanced operation The XLR pin configuration is described below Pin 1 Ground Pin 2 Non inverting 0 Pin 3 Inverting 180 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 Krell KAV 1500 Amplifier 11 Opti
3. for your purchase ofthe Krell KAV 1500 Five Channel Power Amplifier The KAV 1500 amplifier provides substantial five channel output power that delivers realistic music reproduction at an exceptional value The amplifier can be customized with a variety of optional system configurations including a multi power mode using the Multi Amp Throughput MAT feature and bridged operation The KAV 1500 amplifier has balanced and single ended inputs for compatibility with other components The multi channel DB 25 input also allows you to integrate the amplifier easily and seamlessly into home theater or whole house systems The amplifier can be operated using the 12 VDC power on off 12 V trigger signals from other components This reference manual contains important information on placement installation and operation of the KAV 1500 amplifier Please read this information carefully A thorough understanding of these details helps ensure satisfactory operation and ong life for your KAV 1500 amplifier and related system components Definition of Terms Following are the definitions of key terms used in your owner s reference manual CONNECTIONS Bridging A method of linking two amplifier channels by distributing the speaker load between the positive binding posts Bridging the channels quadruples the power rating at 8 Ohms Bridged configurations should not be used with loads under 4 Ohms Krell Multi Amp Throughput MAT An interna
4. the ribbon connection cable to jumper pin J18 Connect the other end of the ribbon connection cable to jumper pin J23 Option 4 To bridge the left surround and right surround channels connect one end of the ribbon connection cable to jumper pin J24 Connect the other end of the ribbon connection cable to jumper pin J29 5 Replace the cover and using the T 15 Torx wrench secure all 14 cover screws The KAV 1500 amplifier is now ready for bridged operation 0 Krell KAV 1500 Amplifier Connecting the Bridged KAV 1500 See Figure 2 on page 7 Connect the bridged channels as follows Option 1 1 When the left and right channels are bridged connect the output cable from the output device to the appropriate balanced 7 or single ended 12 left channel input 2 Connect the positive loudspeaker lead red to the positive binding post on the left amplifier channel 18 Connect the negative loudspeaker lead black to the positive binding post of the right amplifier channel 17 Option 2 1 When the right and center channels are bridged connect the output cable from the output device to the appropriate balanced 6 or single ended 11 right channel output 2 Connect the positive loudspeaker lead red to the positive binding post on the right amplifier channel 17 Connect the negative loudspeaker lead black to the positive binding post of the center amplifier channel 16 Option 3 1 When the center and left surround cha
5. 19w x 6 3h x 20 25d in 48 3w x 16h x 51 4d cm 125 Ib 56 81 kg 108 Ib 49 09 kg Shipping Unit only All operational features functions specifications and policies are subject to change without notification Krell KAV 1500 Amplifier 23 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 KAV 1500 Five Channel Power Amplifier v 00 0
6. L PRODUCT Please contact your authorized Krell dealer distributor or Krell if you have any questions not addressed in this reference manual i 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 Multi Amp Throughput is a trademark of Krell Industries Inc All other trademarks and tradenames are registered to their respective companies i 2000 by Krell Industries Inc All rights reserved P N 303961 Contents Page INTRODUCTION 1 DEFINITION OF TERMS 1 UNPACKING 3 PLACEMENT 4 AC Power Guidelines 4 FRONT PANEL DESCRIPTION KAV 1500 6 BACK PANEL DESCRIPTION KAV 1500 8 CONNECTING THE KAV 1500 AMPLIFIER TO YOUR SYSTEM 10 Input and Output Connections 10 OPTIONAL SYSTEM CONFIGURATIONS 12 Multi Amp Throughput 12 Bridged Operation 16 Example of Connection Scenario Multi Power Mode 18 AMPLIFIER OPERATION 19 On Off and Operation 19 TROUBLESHOOTING SYSTEM NOISE 19 QUESTIONS AND ANSWERS 20 WARRANTY 21 RETURN AUTHORIZATION PROCEDURE 22 SPECIFICATIONS 28 Krell KAV 1500 Amplifier iti Illustrations Page FIGURE 1 The KAV 1500 Front Panel 5 FIGURE 2 The KAV 1500 Back Panel 7 FIGURE 3 Reconfiguring the KAV 1500 for MAT Operation 13 FIGURE 4 Reconfiguring the KAV 1500 for Bridged Operation 15 Krell KAV 1500 Amplifier Introduction Thank you
7. RELL KAV 1500 The Leader in Audio Engineering Five Channel Power Ampli fier Instructions for Use lt Owner s Reference KAV 1500 Krell mienas inc n 45 Connair Road Five Channel Power Am C Power Amplifier Orange CT 06477 3650 USA Instructions for Use v 00 0 TEL 203 799 9954 FAX 203 891 2028 E MAIL krell 9 krellonline com WEBSITE http www krellonline com This product complies with the EMC directive 89 336 EEC and the low voltage directive 73 23 EEC WARNINGS The amplifier must be placed on a firm level surface where it is not exposed to dripping or splashing The ventilation grids on the top of the amplifier and the space undemeath the amplifier must be unobstructed at all times during operation Do not place flammable material above or beneath the amplifier Contact your authorized Krell dealer distributor or Krell before using any devices designed to alter or stabi lize the AC power for the KAV 1500 Before connecting the KAV 1500 make sure the amplifier is turned off and any output device such as a preamplifier is in mute or stand by mode Make sure all cable terminations are of the highest quality and free from frayed ends short circuits or cold solder joints Use only one set of inputs to the amplifier at a time After reconfiguring for MAT do not use more than one input at a time After bridging one channel must remain unbridged THERE ARE NO USER SERVICEABLE PARTS INSIDE ANY KREL
8. butor or Krell for assistance Save all packing materials If you ship your amplifier in the future repack the unit in its original packaging to prevent transit damage See Return Authorization Procedure on page 22 for more information Krell KAV 1500 Amplifier 3 Placement Before you integrate the KAV 1500 into your system review the following guidelines to choose the location for the component This will facilitate a clean trouble free installation The KAV 1500 requires at least two inches 5 cm of clearance on each side and at least two inches 5 cm of clearance above the component to provide adequate ventilation The KAV 1500 does not require any type of special rack or cabinet for installation For the dimensions of your amplifier see Specifications on page 23 Place the amplifier as close to the loudspeakers as possible and keep the speaker cable length to a minimum Speaker cable adds impedance to the load the amplifier must drive regardless of the cable s gauge Krell amplifiers drive the lowest impedances with ease but long speaker cables reduce the maximum power that is delivered to the loudspeakers AC POWER GUIDELINES Krell recommends operating each amplifier from a dedicated 15 amp AC power line For maximum power output operate the KAV 1500 amplifier from a dedicated 20 amp AC power line 4 Krell KAV 1500 Amplifier FIGURE 1 THE KAV 1500 FRONT PANEL KAV 1500 1 Power Butto
9. connection See Input and Output Connections on page 10 Connecting the KAV 1500 Reconfigured for MAT on page 14 and Connecting the Bridged KAV 1500 on page 17 for more information on amplifier channel output connections 8 Krell KAV 1500 Amplifier Back Panel Description continued Fuses 19 AGC 12 Fuses The AGC 12 Volt loudspeaker fuses protect the KAV 1500 against short circuits in loudspeaker output 20 Line Fuse The line fuse protects the KAV 1500 against short circuits in internal power supplies Note Fuses must be replaced with the fuse value specified on the KAV 1500 back panel Use a 20 amp slow blow line fuse for 100 120 V systems or a 12 amp slow blow line fuse for 220 240 V systems Remote Connections 21 12 VDC Remote Power Out The KAV 1500 is equipped with an output that sends 12 VDC power on off 12 V trigger signals to other Krell components and other devices that incorporate a 12 V trigger 22 12 VDC Remote Power In The KAV 1500 is equipped with an input that receives 12 VDC power on off 12 V trigger signals from other Krell components and other devices that incorporate a 12 V trigger This allows you to turn the KAV 1500 on and off using a Krell or other component in a custom installation Notes 12 VDC Ourl in 12 V trigger remote power is limited to 30 ma Consult the owner s manual of each component used in a custom installation to take full advantage of the KAV 1500 rem
10. e Figure 2 on page 7 The KAV 1500 back panel provides connections for all inputs and outputs remote connection input and output links and AC power supply Balanced Inputs 3 4 5 6 7 Inputs These are the right surround 3 left surround 4 center 5 right 6 and left 7 KAV 1500 channel inputs for output devices with balanced XLR connectors Single ended Inputs 8 9 10 11 12 Inputs These are the right surround 8 left surround 9 center 10 right 11 and left 12 KAV 1500 channel inputs for output devices with single ended RCA connectors See Reconfiguring the KAV 1500 for MAT on page 14 and Reconfiguring the KAV 1500 for Bridged Operation on page 16 for information on optional system configurations Multi channel Input 13 Multi channel Input This is the DB 25 input for connecting to the DB 25 output of a preamp processor The DB 25 input incorporates all five channels plus a 5 VDC 5 Volt trigger and allows you to send all audio signals and turn the amplifier on and off via a single cable Amplifier Channel Outputs 14 15 16 17 18 Outputs These are the right surround 14 left surround 15 center 16 right 17 and left 18 KAV 1500 amplifier channel outputs with five way loudspeaker binding posts The loudspeaker binding post terminals accept spade lugs bare wire banana plugs or pins Use the red terminal for the positive connection and the black terminal for the negative
11. en the KAV 1500 is reconfigured for MAT each channel powers an individual loudspeaker with one KAV 1500 dedicated to driving outputs to the left loudspeakers and one KAV 1500 driving outputs to the right loudspeak ers The diagram below illustrates this connection scenario Left Speakers Living Room L Kitchen L Patio L Bedroom L Left Amplifier Right Amplifier Living Room R Kitchen R Patio R Gym R Bedroom R Right Speakers 18 Krell KAV 1500 Amplifier Amplifier Operation ON OFF AND OPERATION When powering up your system turn amplifiers on last When powering down your system turn amplifiers off first The procedures for amplifier operation follow 1 Press the power button 1 on the KAV 1500 front panel The blue power LED 2 illuminates and you hear a click The amplifier is now ready for operation 2 With the output device muted or volume control fully lowered select an output device Decrease or increase the volume control to the desired listening level 3 Before turning the system off mute or lower the output device volume Press the front panel power button 1 to turn the amplifier off It is now safe to turn off the rest of the system IMPORTANT Always turn off the amplifier before changing input connections and mute or fully attenuate the preamplifier level when switching sources The KAV 1500 has tremendous reserves of power and safely d
12. fier is shipped with ribbon connection cables in place and polarized to ensure the correct phase see Figure 3 on page 13 Do not remove or change these ribbon connection cables The KAV 1500 is not reconfigured for bridged or Multi Amp Throughput MAT operation when it is shipped to you Use the additional ribbon connection cables shipped with the amplifier and instructions on pages 12 and 16 to reconfigure the KAV 1500 for bridged or MAT operation 20 Krell KAV 1500 Amplifier 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 war ranty 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 berepair in no event will Krell be liable for incidental or con sequential 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 i
13. igured to bridge four of its amplifier channels to operate as two combined amplifier channels The bridged amplifier channels each deliver 1 100 Watis into an 8 Ohm load The unbridged amplifier channel can be connected to a separate loudspeaker IMPORTANT One channel must remain unbridged Reconfiguring the KAV 1500 for Bridged See Figure 4 on page 15 Tools needed T 15 Torx wrench and two ribbon connection cables 1 Turn the KAV 1500 off by pressing the power button 1 on the front panel The blue power LED 2 extinguishes Unplug the AC power cord 23 from AC power 2 Using the T 15 Torx wrench remove all 14 cover screws that secure the amplifier cover Carefully remove the cover 3 Locate the PC input board and jumper pins at the rear of the amplifier 4 Follow the directions below You may bridge channels using Options 1 and 3 or Options 1 and 4 or Options 2 and 4 IMPORTANT Do not attempt to bridge channels in any way other than specified in these directions Option 1 To bridge the left and right channels connect one end of the ribbon connection cable to jumper pin J6 Connect the other end of the ribbon connection cable to jumper pin J11 Option 2 To bridge the right and center channels connect one end of the ribbon connection cable to jumper pin J12 Connect the other end of the ribbon connection cable to jumper pin J17 Option 3 To bridge the center and left surround channels connect one end of
14. l connection option that sends the same music signal to all amplifier channels using one balanced or single ended connection MAT reduces installation complexity _ and cabling requirements in systems containing multiple amplifiers MAT also allows a variety of connection scenarios including powering multiple pairs of loudspeakers to extend the listening environment throughout your home INPUTS AND OUTPUTS 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 installations balanced connections have 6 dB more gain than single ended connections and allow the use of long interconnect cables Krell KAV 1500 Amplifier 1 Definition of Terms continued Single ended A two wire input or output circuit Use care when using single ended connections in which 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 recommended for configurations requiring long cable runs Multi channel DB 25 A balanced input or output circuit that allows for the simultaneous connection of all audio outputs plus one 5 VDC 5 Volt trigger via a single cable DB 25 inputs and outputs are becoming popular for connecting multi channel A V processors and power amplifiers simplifying the integration of the two components into
15. n 2 Power LED Front Panel Description KAV 1500 See Figure 1 on page 5 1 Power Button Use this button to switch the KAV 1500 power from off to the operational mode and also to switch the 12 VDC output 12 V trigger on and off 2 Power LED The blue power LED illuminates when the amplifier is in the SPOTS mode 6 Krell KAV 1500 Amplifier FIGURE 2 THE KAV 1500 BACK PANEL INPUT INPUT INPUT INPUT p 9 9 d 8 AGC 12 A AGC 12 Y AGC 12 J AGC 12 A e FUSE OUTPUT OUTPUT OUTPUT OUTPUT RIGHT SURROUND LEFT SURROUND CENTER RIGHT lS or o O O Qf ef e ef i i NO USER SERVICEABLE PARTS INSIDE 6 20 23 1914 19 15 19 16 1917 Balanced Inputs Amplifier Channel Outputs 3 Right Surround Input 14 Right Surround Output 4 Left Surround Input 15 Left Surround Output 5 Center Input 16 Center Output 6 Right input 17 Right Output 7 Left Input 18 Left Output Single ended Inputs Fuses 8 Right Surround Input 19 AGC Fuses 9 Left Surround Input 20 Line Fuse 10 Center Input 11 Right Input 12 Left Input Multi Channel Input 13 Multi channel Input Remote Connections 21 12 VDC Remote Power Out 22 12 VDC Remote JA Power In Power 23 AC Power Cord 12 21 22 INPUT KAV 1500 E Power Amplifier O O re AGC 12 OUTPUT LEFT KRELI Industries Inc o Grange CT 06477 3650 USA ef o WR 1918 13 Fuse BATING VALLE CHANGED TO 46C o IN 20050 Back Panel Description KAV 1500 Se
16. nnels are bridged connect the output cable from the output device to the appropriate balanced 5 or single ended 10 center channel input 2 Connect the positive loudspeaker lead red to the positive binding post on the center amplifier channel 16 Connect the negative loudspeaker lead black to the positive binding post of the left surround amplifier channel 15 Option 4 1 When the left surround and right surround channels are bridged connect the output cable from the output device to the appropriate balanced 4 or single ended 9 left surround channel input 2 Connect the positive loudspeaker lead red to the positive binding post on the left surround amplifier channel 15 Connect the negative loudspeaker lead black to the positive binding post of the right surround amplifier channel 14 For each option the remaining unbridged channel may be connected to a separate loudspeaker for normal operation IMPORTANT When operating the amplifier in bridged mode and using an output device with a single ended RCA cable be sure to remove the shorting pin from the balanced XLR input Multi Power Mode Connection Multi power mode is one possible connection scenario using the KAV 1500 s Multi Amp Throughput MAT feature With Multi Power Mode you can use the KAV 1500 reconfig ured for MAT to independently power multiple pairs of stereo loudspeakers to extend the listening environment throughout your home Wh
17. nt have been made in advance Proof of pur chase will be required for warranty valida tion at the time of hand delivery IMPORTANT Use the original packaging to ensure safe transit of this product to the dealer distribu tor or factory Krell may at its discretion return this product in new packaging and bill the owner for such packaging if the product received by Krell was boxed in non stan dard 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 this product is returned To purchase additional packaging please contact your authorized Krell dealer distrib utor or the Krell Service Department Krell KAV 1500 Amplifier Specifications KAV 1500 Five Channel Amplifier FREQUENCY RESPONSE SIGNAL TO NOISE RATIO A WEIGHTED TOTAL HARMONIC DISTORTION THD GAIN INPUT IMPEDANCE INPUT SENSITIVITY OUTPUT VOLTAGE OUTPUT POWER EACH CHANNEL DRIVEN BRIDGED POWER CONSUMPTION INPUTS OUTPUTS DIMENSIONS WEIGHT 20 Hz to 20 kHz 0 dB 0 2 dB 0 4 Hz to 112 kHz 0 dB 3 dB 118 dB 1 kHz 0 06 20 kHz 0 25 26 4 dB 100 kOhms 2 15 Vrms Peak to Peak 166V RMS 59 V 8 Ohms 300 W 4 Ohms 600 W 8 Ohms 1 100W Idle 280 W Max 3 460 W 5 single ended via RCA connectors 5 balanced via XLR connectors 5 via DB 25 connector 5 amplifier channels via five way speaker binding posts
18. nvoice substantiating that the unit is within the warranty period must be presented to obtain warranty service The warranty begins on the date of retail purchase as noted on the bill of sale or receipted invoice from an ome Krell dealer or distributor The warranty for Krell products is valid only in the country to which they were originally shipped through the authorized Krell distributor for that country and at the factory There may be restrictions on or changes to Krell s warranty because of regulations within a specific country Please check with your distributor for a complete understanding of the warranty in your country If a unit is serviced by a distributor who did not import the unit there may be a charge for service even if the product is within the warranty period Freight to the factory is your responsibility Return freight within the United States U S A is included in the warranty If you have purchased your Krell product outside the U S A and wish to have it serviced at the factory all freight and associated charges to the factory are your responsibility Krell will pay return freight to the U S A based freight 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 dam aged in transit to the factory You are resp
19. onal System Configurations The KAV 1500 can be reconfigured for either Multi Amp Throughput on Or operation IMPORTANT Removing the cover to reconfigure for MAT or for bridged operation is the ONLY instance you are authorized to remove the cover of ANY Krell component without voiding your Warranty For more information on proguci limitations and restrictions see Warranty on page 21 Before Reconfiguring for MAT or Bridged Operation Read the following important safety instructions before you attempt to reconfigure your amplifier for either MAT or bridged operation 1 Unplug the power cord Unplug the AC power cord 23 from AC power 2 Avoid the power supply After removing the screws see instructions below and the cover locate and stay aware of the location of the power supply round silver structures behind the amplifier front panel Avoid making contact with that area of the amplifier 3 Remove jewelry Rings necklaces bracelets and other pieces of metal jewelry can conduct an electrical charge Consider removing them before attempting any reconfiguration 4 Always replace cover Make sure the amplifiers cover is properly replaced and secured by all 14 cover screws before resuming operation IMPORTANT Operating the amplifier without the cover properly replaced and Seiad may void your warranty MULTI AMP THROUGHPUT Multi Amp Throughput MAT is an internal connection option for the KAV 1500 that lets yo
20. onsible 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 prod ucts 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 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 distrib utor 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 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 at the owners 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
21. ote capability Power 23 AC Power Cord The KAV 1500 is equipped with a hardwired AC power cord Krell KAV 1500 Amplifier i 9 Connecting the KAV 1500 Amplifier to Your System INPUT AND OUTPUT CONNECTIONS Follow these steps to connect the KAV 1500 amplifier to your system 1 Make sure all power sources and components are off before connecting inputs and outputs 2 Neatly organize the wiring between the amplifier and all system components Separate AC wires from audio cables to proven hum or other unwanted noise from being introduced into the system 3 Connect the interconnect cables from your output device to the amplifier inputs The KAV 1500 is equipped with balanced 3 4 5 6 7 or single ended 8 9 10 11 12 inputs located on the back panel The balanced inputs use three pin XLR connectors the A i inputs use RCA connectors or Use the multi channel m connector to simplify the integration of the KAV 1500 into your system Connect the DB 25 output on your preamp processor to the DB 25 input 13 located on the back panei of the KAV 1500 The DB 25 cable simultaneously transmits audio outputs and Trigger 1 signals from the Krell Home Theater Standard Surround Preamp processor HTS DB 25 output to all inputs and a 5 VDC 5 Volt trigger on the KAV 1500 via the DB 25 input Note You need to configure Trigger 1 on the HTS before operation IMPORTANT Do not connect the multi channel kig and single
22. rives loudspeakers to extremely high sound pressure levels However use care when setting high playback levels and lower the volume level at any sign of loudspeaker distress Troubleshooting System Noise When you mix and match high performance audio components each with its own ground potential a low frequency hum may occur in one or all loudspeakers If this happens when you place the KAV 1500 into your system follow these simple troubleshooting steps 1 Check that all input and output connections are of sound construction 2 With the amplifier off remove the interconnect cables then turn the amplifier on If the hum disappears turn the amplifier off and reinsert one of the interconnect cables Turn the amplifier back on Repeat this process for each cable 3 If the hum reappears with one or both interconnect cables reinserted the cable needs to be replaced 4 If the interconnect cables are sound you may be experiencing a ground loop Please contact your authorized Krell dealer distributor or Krell for suggestions on how to eliminate it Krell KAV 1500 Amplifier 19 Questions and Answers Q Should leave the KAV 1500 amplifier on at all times A No The amplifier does not have a stand by mode Leaving it on at all times would result in considerable heat output and power consumption For best results turn the amplifier off when not in use and allow a five minute warm up after it is switched to the opera
23. tional mode See Amplifier Operation on page 19 Q When turn the amplifier on there is a loud hum through the loudspeakers What should do A When a new component is introduced a low frequency hum may occur in one or both loudspeakers Check that all input and output connections and cables are of sound construction See Troubleshooting System Noise on page 19 If the connections 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 Q When connect the amplifier to my denn using the single ended inputs a loud buzz comes from my loudspeakers What is it A Check that the shorting pins for the KAV 1500 are inserted into the XLR inputs the unit is shipped with the pins in place When using the single ended inputs these shorting pins must be inserted between pins 1 and 3 to keep external noise from corrupting the signal For more information see Connecting the KAV 1500 Amplifier to Your System on page 10 Q Can bridge all the channels on my KAV 1500 A The KAV 1500 has five channels You can bridge four of those channels to operate as two channels One channel must remain unbridged See Bridged MIpOrSuon on page 16 Q want to bridge the channels on my KAV 1500 but when open the amplifier there are ribbon connection cables already i in place Should remove them A No Your ampli
24. u send the same music signal to all amplifier channels using one balanced or single ended connection MAT reduces installation complexity and cabling requirements in systems containing multiple amplifiers 12 Krell KAV 1500 Amplifier FIGURE 3 RECONFIGURING THE KAV 1500 FOR MAT OPERATION Right For Channel Bridging PRC Permanent ribbon connections Do Not Remove MAT Multi Amp Throughput MAT ribbon connections Reconfiguring the KAV 1500 for MAT See Figure 3 on page 13 Tools needed T 15 Torx wrench and four ribbon connection cables 1 Turn the KAV 1500 off by pressing the power button 1 on the front panel The blue power LED 2 extinguishes Unplug the AC power cord 23 from AC power 2 Using the T 15 Torx wrench remove the 14 screws that secure the ES cover Carefully remove the cover 3 Locate the PC input board and jumper pins at the rear of the amplifier IMPORTANT Do not remove or change the ribbon connection cables already in place These connections are polarized to ensure the correct phase 4 Connect one end of the first ribbon connection cable to jumper pin J5 Connect the other end of the ribbon connection cable to jumper pin J11 5 Use the remaining ribbon connection cables to connect J10 to J16 J17 to J22 J23 to J28 6 Replace the cover sliding the front panel end in first and using the T 15 Torx wrench secure all 14 cover screws The KAV 1500 amplifier is no
25. w reconfigured for MAT operation Connecting the KAV 1500 Reconfigured for MAT See Figure 2 on page 7 1 Connect your output device to one of the balanced inputs 3 4 5 6 or 7 or one of the single ended inputs 8 9 10 11 or 12 on the KAV 1500 back panel IMPORTANT Do not use the multi channel input if you have reconfigured the KAV 1500 for MAT or bridged operation 2 Connect each amplifier channel output 14 15 16 17 18 toa separate loudspeaker using the pone and negative terminals on the speaker binding posts 14 Krell KAV 1500 Amplifier FIGURE 4 RECONFIGURING THE KAV 1500 FOR BRIDGED OPERATION Do not attempt to bridge channels in any way other than specified below Option 4 MR Option 3 e l Option 2 si E ez Left To Slow For Right For Center For For Left Surround For Right Board INPUT BOARD ap Jy Exp ml ul ls zl jd ind loud m mi jte luz P107058 pal nello Lies MIEI lo los PRC PRC PRC I PRC PRC PRC Option 1 Bridging BRG Option 3 Bridging BRG the Left and Right Channels the Center and Left Surround Channels For KRELL INDUSTRIES Bridging INPUT BOARD mi Right For Channel Bridging luz P10705B Option 2 Bridging BRG Option 4 Bridging BRG the Right and the Left Surround and Center Channels Right Surround Channels PRC Permanent ribbon connections Do Not Remove BRG Bridging BRIDGED OPERATION The KAV 1500 can be reconf
26. your system OPERATION Off When the power button on the front panel is pressed and the blue power LED turns off the component is off Operational Mode When the power button on the front panel is pressed and the blue power LED illuminates the component is in the operational mode and ready to play music Stand by Mode A low power consumption status that keeps the audio and regulator circuits at idle Krell recommends leaving the component in the stand by mode when it is not playing music 2 Krell KAV 1500 Amplifier Unpacking Open the shipping box which contains 1 amplifier unit packed in foam end caps 4 ribbon connection cables Fuses 2 AGC amp Q amp speakerfuse 1 slow blow 20 amp for 100 120V or 1 2 amp for 220 240V line fuse 1 12 VDC output 12 V trigger cable 1 T 15 Torx wrench 1 packet containing the owner s reference manual and the warranty registration card IMPORTANT Two people are needed to remove the amplifier from the shipping box 1 One person grasps the underside of the foam end caps at one end of the amplifier at the same time the second person grasps the underside of the foam end caps at the other end of the amplifier 2 Slowly lift the amplifier straight out of the shipping box 3 Place the amplifier in a safe location and remove the protective plastic wrapping Notes If any of these items are not included in the shipping box please contact your authorized Krell dealer distri
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