Krell Industries KAV-250a/3 Manuel d'utilisateur

Leader in Audio EngineeringKAV-250aStereo Power AmplifierKAV-250a/3Three-Channel Power AmplifierInstructions for Use, v 99.2Owner’s Reference

FIGURE 2 THE KAV-250a BA(;K PANEL511 12 10 13Balanced Inputs3 Right Input4 Left Input (Bridged)Single-ended Inputs5 Right Input6 Left Input (Bridge

Back Panel Description: KAV-250aSee Figure 2 on page 6The KAV-250a back panel provides connections for all inputs and outputs, remotecontrol input

Back Panel Description, continuedRemote Controls11 12 VDC Remote Power Out12 12 VDC Remote Power InThe KAV-250a is equipped with an output that

FIGURE 3THE KAV-250a/3 FRONT PANEL14 1514 Power Button15 Power LED

Front Panel Description: KAV-250a/3See Figure 3 on page 914 Power ButtonUse this button to turn the KAV-250a/3 power on and off and also to

FIGURE 4THE KAV-250a/3 BACK PANEL16 19 17 2o18 2125 2225 23 25 2427 28 26 29Balanced Inputs16 Right Input17 Center Input18 Left InputSingle-ende

Back Panel Description: KAV-250a/3See Figure 4 on page 11The KAV-250a/3 back panel provides connections for all inputs and outputs, remotecontrol

Back Panel Description, continuedNoteFuses must be replaced with the fuse value specified on the KA V-250a/3 back panelUse a 20 amp slow-blow line

Connecting the KAV-250a or KAV-250a/3Amplifier to Your SystemINPUT AND OUTPUT CONNECTIONSThe following steps describe how to connect cables t

Optional System ConfigurationsThe KAV-250a and KAV-250a/3 can be reconfigured for either Multi Amp Throughput(MAT) or bridged operation.IMPORTANT

KAV-250a Stereo Power Amplifier andKAV-250a/3 Three-Channel Power AmplifierInstructions for Use, v 99.2Cover: KAV-250a/3 Three-Channel Power Amplifie

FIGURE 5 RECONFIGURING THE KAV-250a FOR MAT OR BRIDGED OPERATI( tNPC boards showingMAT jumperconfigurationLeft RightPC boards showingbridged jumpercon

Reconfiguring the KAV-250a for MATSee Figure 5 on page 16Tools needed: T-15 Torx wrench and one ribbon connection cable1. Turn the KAV-250a off by

5. Connect one end of the second ribbon connection cable to jumper pin J4 on thecenter amplifier channel. Connect the other end of this ribbon co

FIGURE 6 RECONFIGURING THE KAV-250a/3 FOR MAT OR BRIDGED OPERATIONPC boards showingMAT jumperconfigurationPC boards showingbridged jumperconfigurati

BRIDGED OPERATIONThe KAV-250a and the KAV-250a/3 can be reconfigured for bridged operation. Whenthe KAV-250a amplifier’s channels are bridged, the a

IMPORTANTWhen operating the amplifier in bridged mode and using an output device withsingle-ended RCA cables, be sure to remove the shorting pin

2. When the center and right amplifier channels are bridged (Option 2), connect theoutput cable from the output device to the right balanced XLR

Examples of Connection Scenarios, continuedPower Biamplification (Stereo, 2-channel)Power biamplification uses the MAT feature of the KAV-250

Examples of Connection Scenarios, continuedMulti Power ModeMulti power mode uses the KAV-250a/3’s MAT feature to independently power multiplepairs o

Amplifier OperationON/OFF AND OPERATIONWhen powering up your system, turn amplifiers on last. When powering down yoursystem, turn amplifiers off

ContentsINTRODUCTION ’DEFINITION OF TERMSUNPACKINGPLACEMENTAC Power GuidelinesFRONT PANEL DESCRIPTION: KAV-250aBACK PANEL DESCRIPTION: KAV-250aFRONT

Amplifier TroubleshootingHOW TO TROUBLESHOOT SYSTEM NOISEWhen you mix and match audio components, each with its own ground potential, a lowfreq

Question and AnswerQ. Should I leave the KAV-250a or KAV-250a/3 amplifier on at all times?A. No. These amplifiers do not have a stand-by mode.

WarrantyThe KAV-250a and KAV-250a/3 amplifiers have. a limitedand transferable warranty of five years for parts and laboron cimuitry. Should this

Return AuthorizationProcedureIf you believe there is a problem with yourcomponent, please contact your dealer, dis-tributor, or the Krell factory t

SpecificationsKAV-250a Stereo AmplifierFREQUENCY RESPONSESIGNAL TO NOISE RATIO"A" WEIGHTEDTOTAL HARMONIC DISTORTION (THD)GAININPUT IMPEDAN

KAV-250a/3 Three-Channel AmplifierFREQUENCY RESPONSE20 Hz to 20 kHz0.4 Hz to 112 kHzSIGNAL TO NOISE RATIO"A" WEIGHTEDTOTAL HARMONIC DISTO

Krell Industries, Inc.45 Connair RoadOrange, CT 06477-3650 USATEL 203-799-9954FAX 203-799-9796E-MAIL krell@ krellonline.comWEBSITE http://www.krellon

IllustrationsFIGURE 1FIGURE 2FIGURE 3FIGURE 4FIGURE 5The KAV-250a Front PanelThe KAV-250a Back PanelThe KAV-250a/3 Front PanelThe KAV-250a/3 Back Pa

IntroductionThank you for your purchase of the Krell KAV-250a Stereo Power Amplifier orKAV-250a/3 Three-Channel Power Amplifier..The KAV-250a and

UnpackingOpen the shipping box, which contains:1 amplifier unit (packed in foam end-caps)2 ribbon connection cablesKAV-250a fuses:2 AGC-8 (~ ’am

PlacementBefore you integrate the KAV-250a or KAV-250a/3 into your system, review thefollowing guidelines to choose the location for the componen

FIGURE 1 THE KAV-250a FRONT PANEL1 21 Power Button2 Power LED

Front Panel Description: KAV-250aSee Figure 1 on page 41 Power ButtonUse this button to turn the KAV-250a power on and off and also to switc