Krell Industries 200c, Instructions For Use Manual

Page 1: ...i i I I Ai I I i i1 1 lLaI ll l I I III II IEEI ilI IC Full PowerBalanced PowerAmplifiers 200c 300c 600c Stereo 250Mc 350Mc 650Mc Monaural with Krell CASTTechnology Instructions for Use Owner s Reference ...

Page 2: ...Power Balanced amplifiersrequires specialattentionwhen connect ing speakers DO not connect the negative speaker terminals together Donot connect the negative speaker ter minals to ground or attempt to bridge the left and right speaker binding postsof Full Power Balanced stereoampli fiers Donot connecta Full PowerBalanced amplifier to a speakerselector device that employsa common ground scheme asit...

Page 3: ...ns Krell Link Connections DCProtectionCircuitry Usinga TubePreamplifier AMPLIFIER OPERATION On Offand Stand byOperation Krell Link Operation REMOTECONTROLOPERATION How to TumOff the Amplifier LEDs Howto Tum on the Amplifier LEDs Howto Switch betweenKrell CAST and XLRInputs Usinga Dedicated WallOutlet andSwitch AMPLIFIER TROUBLESHOOTING Howto TroubleshootSystemNoise How to EvaluateAmplifier Operati...

Page 4: ... Amplifier Front Panel FIGURE 2 Full PowerBalancedMonauralAmplifier Front Panel FIGURE 3 Full PowerBalancedStereo Amplifier BackPanel FIGURE 4 Full PowerBalancedMonaural Amplifier BackPanel Page 6 7 9 10 iv Krell Full Power Balanced Power Amplifiers ...

Page 5: ...od of synchronizingremotecontrol oper ation for Krell systems that includemultiple pre amplifiers amplifiers and associated compo nents When Krell Link in out connectionsare used the remotecapabilities of the linked com ponents are controlled from one component called the control component Thelinked com ponents respond to stand by and operational modecommands from the control component via MIDIcab...

Page 6: ... A low power consumption status that keepsthe audioandregulatorcircuits at idle Krell recom mends leaving the component in the stand by mode when it is not playingmusic TECHNOLOGY Krell CurrentMode AproprietaryKrell circuit topology in which the audiogain stagesof a component operatein the current rather than voltagedomain This unique technology provides the component with exceptionalspeed anda wi...

Page 7: ...nning to end an entire CAST systembehaves as if it is onecomponent With CAST anomaliesof signal transmissionbetween componentsare eliminated Cable impedances and their effects on the transmitted signal are non existent HowCASTand Krell Current ModeInteract While CAST is a newmethodof transferring the musical signal betweencomponents its origin stems from Krell Current Mode the technology developed...

Page 8: ...to your system please follow the guidelines in this section to chooseits proper location Thiswill facilitate a clean trouble free installation TheFull PowerBalancedamplifier requires at least two inches 5 cm of clearance on each side andat least eight inches 20 cm of clear ance above the componentto provide ade quateventilation Although Sustained Plateau Bias II circuitry reducesthe high heat diss...

Page 9: ...umof 15 amps The Full PowerBalanced 300c 350Mc 600c and 650Mc amplifiers needto be operat ed from a dedicated ACpowerline rated at a minimumof 20 amps PleasecontactyourauthorizedKrell dealer dis tributor or Krell before using any devices designedto alter or stabilize the ACpowerfor Full PowerBalancedamplifiers Krell Full Power Balanced Power Amplifiers 5 ...

Page 10: ...RE 1 FULL P IWER BALANCED STEREO AMPLIFIER FR NT PANEL 123 456 1 Power Stand by LED 2 Bias LED 3 Power Button 4 Infrared Sensor 5 Krell CASTLED 6 Regulator LED 6 Krell Full Powered Balanced Power Amplifiers ...

Page 11: ...2 FULL POWERBALANCED MONAURAL AMPLIFIER FR INT PANEL 789 10 1112 7 PowerStand by LED 8 Bias LED 9 PowerButton 10 InfraredSensor 11 Krell CAST LED 12 RegulatorLED Krell Full Powered Balanced Power Amplifiers 7 ...

Page 12: ... right of triangle illuminates after the front panelpowerbuttonis usedto poweron from stand by mode indicat ing that the regulator is providing powerto the output stage Note Anoptional remotecontrol is available for Full PowerBalancedamplifiers FULL POWER BALANCED 250Mc 350Mc AND650Mc MONAURAL POWER AMPLIFIERS SeeFigure2 onpage7 7 Power Stand by LED Theblue powerstand by LIED top of LED tri angle ...

Page 13: ...NEL 19 13 14 15 16 17 18 16 14 13 19 13 Left andRight Speaker BindingPosts 14 Krell CAST Inputs 15 BackPanelPowerBreakerSwitch 16 Left andRightBalanced Inputs 17 Krell LinkOut In 18 ACMainsPowerCord 19 Handles Krell Full Powered Balanced Power Amplifiers ...

Page 14: ...AL AMPLIFIER BACK PANEL 20 21 22 23 24 25 26 20 Handle 21 SpeakerBindingPosts 22 Krell CAST Input 23 Balanced Input 24 ACMainsPowerCord 25 Krell LinkOut In 26 BackPanel Power BreakerSwitch 10 Krell Full Powered Balanced Power Amplifiers ...

Page 15: ...rell CAST input via 4 pin bayonetconnectors TheKrell CAST inputs allow the Full PowerBalancedamplifier to be connectedto the KPS25sc Krell PlaybackSys tem and other CAST equipped components 15 Back Panel Power Breaker Switch Full PowerBalancedamplifiers are equipped with a back panel power breaker switch for powering on the amplifier Placing the back panel powerbreaker switch in the up position pl...

Page 16: ...put Full PowerBalanced250Mc 350Mc and 650Mc monauralamplifiers are equippedwith onebal ancedinput via an XLR connector 24 AC Mains Power Cord All Full PowerBalancedamplifiers are equipped with a permanentlyattached ACpowercord 25 Krell Link Out In Full PowerBalanced amplifiers are equipped with Krell Link Remote out in connectors that allow the remote control to operate a linked amplifier configur...

Page 17: ...amplifier s speaker binding posts locatedonthe amplifier backpanel Speaker bindingpostsfor bothstereoand monaural amplifiersacceptspade lugs only 4 Insert the endof the ACmainspowercord into the ACwall receptacle 5 Proceedwith Krell Link Connections if desired or turn to Amplifier Operation on page15 KRELL LINK CONNECTIONS Krell Link Remote out in connectorson the backpanelof the Full Power Balanc...

Page 18: ...the audio signal path Coupling capacitors block damagingDCbut havesonic characteristics that corrupt sound reproduction Note For moreinformation aboutDCprotection cir cuitry features seeAmplifier Troubleshooting on page17 USING A TUBEPREAMPLIFIER The high DCoutput of tube preamplifiers may exceed the DCprotection circuitry of Full Power Balanced amplifiers Excessive DC level in a signal candamage ...

Page 19: ...protectioncircuitry hasconfirmed that safe operatingconditions exist the input relays engage Youhear a click Theam plifier is ready for operation If the Krell CAST input is being used the Krell CASTred LED illuminates and remainsilluminated at all times during the stand by or poweron modes 3 With the preamplifier mutedor volumecon trol completelylowered select a source Increasethe volumecontrol to...

Page 20: ...urnedoff HOWTO TURN ON THE AMPLIFIER LEDs With the amplifier in the stand by mode turn the rear panel powerbreaker switch to the off position Thenturn the rear panel powerbreak er switch backto the on position Thenext time the amplifier is powered up from the front panel or the remotecontrol the blue LEDs illuminates during the turn on sequence HOWTO SWITCH BETWEEN KRELLCAST ANDXLR INPUTS Pressthe...

Page 21: ...bles checked before proceeding 2 If the interconnect cables are sound you maybe experiencing a ground loop This canoften be easily eliminated Pleasecon tact yourauthorizedKrell dealer distributor or Krell for suggestions on howto solve this problem HOWTO EVALUATEAMPLIFIER OPERATION Theamplifiers are protectedby a series of non intrusive circuits that constantly evaluatethe amplifier s operation Th...

Page 22: ...ercablesfor anycuts or frayed edgesthat might form a connection between the positive and neg ative speakerbindingpost ter minals Theamplifier switchesto stand by at high volumes and the PowerStand by LEDilluminates Insufficient AC current from the wall outlet Excessive heat Make surethe ACline is at least 15 amps for 200cand 250Mc amplifiers 300c 350Mc 600c and 650Mc amplifiers shouldbe operatedfr...

Page 23: ...dscheme Thedifferential circuitry in Full Power Balanced amplifiers prohibits the use of these devices Donot connecta Full Power Balancedamplifier to a speaker selector device that employs a commonground scheme as it mayshort circuit the amplifier output Q Myspeakers haveonly one pair of binding posts but my Full Power Balanced stereo amplifier has two pairs Whichpair of speaker binding posts shou...

Page 24: ...warranty period Freightto thefactoryis yourresponsibility Return freight withintheUnited States U S A is included in thewarranty If youhave purchased yourKrell product outsidetheU S A andwish to have it serviced at thefactory all freight and associated charges to the factoryare yourresponsibility Krell will payreturnfreightto theU S A based freightfor warder of yourchoice Freightandothercharges to...

Page 25: ...oss of or damage to this product during shipmentto the Krell factory and prepayall shipping charges Please see the Warrantypagein this manual concerning liability for shipping damage and shipping charges This product mayalso be hand delivered if arrangements with the Service Department have beenmade in advance Proof of purchase maybe required for warranty validation at the time of handdelivery IMP...

Page 26: ...air CAST Via 4 pin bayonetconnectors 4 pair upper left lowerleft upper right lowerright Stand by 75 W Idle 350 W Max 3 000 W 1 pair balanced via XLRconnectors 1 pair CAST via 4 oin bayonetconnectors 4 pair upper left lowerleft upper right lowerright FPB 600c 20 Hzto 20 kHz 0 dB 0 05 dB 0 1 Hzto 240kHz 0 dB 3 dB 120dB 26 4 dB 1 kHz 0 02 20 kHz 0 15 100kOhms 3 39 Vrms 8 Ohms 600W 4 Ohms 1 200 W 2 Oh...

Page 27: ...s 1 300W 2 Ohms1 000 W 2 Ohms1 400 W 2 Ohms2 600 W Peakto Peak138 V Peakto Peak170V RMS 49 V RMS 60 V Stand by 30 W Stand by 37 5 W Idle 150 W Idle 175 W Max 1 700 W Max 3 000 W 1 balancedvia XLRconnectors 1 Krell CAST via 4 pin bayonetconnectors 1 balanced via XLRconnectors 1 Krell CAST via 4 pin bayonetconnectors Peakto Peak240 V RMS 84 V Stand by 42 5 W Idle 220 W Max 6 000 W 1 balanced via XLR...

Page 28: ...d Orange CT06477 3650USA TEL 203 799 9954 FAX203 891 2028 E MAIL krell krellonline com WEB SITEhttp www krellonline com Full PowerBalanced PowerAmplifiers 200c 300c 600c Stereo 250Mc 350Mc 650Mc Monaural with Krell CASTTechnology v 00 0 ...