Krell-industries Evolution Manuale Utente

OWNER’S REFERENCEEVOLUTIONEVOLUTION AMPLIFIERS302 AND 402 STEREO403 THREE-CHANNEL600 AND 900 MONAURAL

10TechnologyActive Cascode TopologyA unique circuit technique that minimizes distortion by applying from 2 to 3 timesmore active devices to each gain

11Unpacking and PlacementThis section describes the procedures for safely unpacking and placing yourEvolution amplifier. The amplifier and accessories

12PlacementBefore you install an Evolution amplifier into your system, please follow the guide-lines in this section to select a location for your com

13SECTION THREEAnatomy of an Evolution AmplifierThis section describes Evolution amplifier functions. Figure 1 Evolution Amplifier Front Panel (Evolu

14Front Panel DescriptionSee Figure 1 on the previous pageEvolution amplifier front panel functions are described below:Power1 Power ButtonPress this

15Figure 2 Evolution 302 Stereo Amplifier Back Panel3 Loudspeaker Binding Posts4 CAST Inputs5 Single-ended Inputs6 Balanced Inputs712 VDC Out/In (12 V

16Figure 3 Evolution 402 Stereo Amplifier Back Panel 3 Loudspeaker Binding Posts4 CAST Inputs5 Single-ended Inputs6 Balanced Inputs712 VDC Out/In (12

17Figure 4 Evolution 403 Multi-channel Amplifier Back Panel3 Loudspeaker Binding Posts4 CAST Inputs5 Single-ended Inputs6 Balanced Inputs7 12 VDC Out

18Figure 5 Evolution Monaural Amplifier Back Panel (Evolution 600 shown)3 Loudspeaker Binding Posts4 CAST Input5 Single-ended Input6 Balanced Input7

19Back Panel DescriptionSee Figure 2, 3, and 4 on the previous pagesThe amplifier back panel provides access to the input and output connections, 12 V

Evolution 302, 402, 403, 600 and 900 Power Amplifiers Owner’s Reference, v07.0Krell Industries, Inc.45 Connair RoadOrange, CT 06477-3650 USAThis produ

20Remote Connections7 12 VDC In/Out (12 V Trigger)The 12 V trigger allows you to turn the Evolution amplifier on or off, or to andfrom stand-by, from

21SECTION FOURConnecting an Evolution Amplifier to Your SystemThis section describes Evolution amplifier connections. Each Evolution amplifierchannel

22Evolution DC Protection Circuitry/Using Tube PreamplifiersThe high DC output of tube preamplifiers may exceed the active DC protectioncircuitry of t

23Evolution Amplifier OperationThe Evolution amplifiers are easy to operate.IMPORTANTWhen powering up any system, turn the amplifier on last. When pow

24Troubleshooting System NoiseAC grounding becomes critical when connecting high-performance audio compo-nents. When you mix and match high-performanc

25Error CodesIn the event of a problem, the power status indicator (2) will flash error code(s) inred. Errors are identified by a sequence of 3, 4, or

26Questions and AnswersQ. Should I leave my Evolution amplifier on at all times?A. For maximum amplifier performance, leave the back panel power break

27WarrantyKrell products have a limited warranty. Amplifiers, preamplifiers, preamp/processors,and receivers carry a limited warranty of five years fo

28If the product is serviced by a distributor who did not import the unit, there may bea charge for service, even if the product is within the warrant

Return Authorization ProcedureHow to Expedite ServiceIf you believe there is a problem with your component, please contact your deal-er, distributor,

3ContentsList of Illustrations, page 4A Letter from Dan D’Agostino, page 5SECTION ONE: Evolution Amplifier Features and Technology, page 6Features, Re

SpecificationsMeasurement Evolution 302 Amplifier Evolution 402 AmplifierFREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.10 dB <0.5 Hz to 180 kHz +0, –3

31(Specifications continued)Measurement Evolution 403 AmplifierFREQUENCY RESPONSE20 Hz to 20 kHz +0, –0.18 dB<0.5 Hz to 120 kHz +0, –3 dBSIGNAL-TO-

32(Specifications continued)Measurement Evolution 600 Amplifier Evolution 900 AmplifierFREQUENCY RESPONSE20 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 12

OWNER’S REFERENCEV07.0KRELL INDUSTRIES, INC.45 CONNAIR ROADORANGE, CT 06477-3650 USATEL: 203-298-4000 • FAX: 203-891-2028E-MAIL: [email protected]

4List of IllustrationsFigure 1, page 13Evolution Amplifier Front PanelFigure 2, page 15Evolution 302 Back PanelFigure 3, page 16Evolution 402 Back Pan

5A Letter from Dan D’AgostinoDear Audio Enthusiast,Thank you for your purchase of a Krell Evolution Series amplifier.Evolution Series amplifiers conti

6SECTION ONEEvolution Amplifier Features and TechnologyThis section describes the innovative features and technology of the EvolutionSeries amplifiers

7Revolutionary Krell CAST TechnologyCurrent Audio Signal Transmission, termed CAST, is a revolutionary method ofconnecting analog audio components for

8Krell Current Mode maintains the integrity of the signal within the component andCAST preserves the transmitted signal between components. Together,

9Definition of TermsThe following are definitions of key terms used in this owner’s reference:Inputs and OutputsBalanced A symmetrical input or output