Krell Evolution e Series Manual User Manual

OWNER’S REFERENCEEVOLUTIONEVOLUTION e SERIES AMPLIFIERS302e, 402e AND 2250e STEREO403e AND 3250e THREE-CHANNEL400e, 600e AND 900e MONAURALK RELLTHE LE

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

11Unpacking and PlacementThis section describes the procedures for safely unpacking and placing your Evolution eSeries amplifier. The amplifier and ac

12PlacementBefore you install an Evolution e Series amplifier into your system, please follow theguidelines in this section to select a location for y

1313SECTION THREEAnatomy of an Evolution e Series AmplifierThis section describes Evolution e Series amplifier functions. Figure 1 Evolution e Series

1414Front Panel DescriptionSee Figure 1 on the previous pageEvolution e Series amplifier front panel functions are described below:Power1 Power Button

15Figure 2 Evolution 302e Stereo Amplifier Back Panel3 Loudspeaker Binding Posts4 Single-ended Inputs5 CAST Inputs6 Balanced Inputs7 12 VDC Out/In (1

16Figure 3 Evolution 402e Stereo Amplifier Back Panel 3 Loudspeaker Binding Posts4 CAST Inputs5 Single-ended Inputs6 Balanced Inputs7 12 VDC Out/In (

1717Figure 4 Evolution 403e Multi-channel Amplifier Back Panel3 Loudspeaker Binding Posts4 CAST Inputs5 Single-ended Inputs6 Balanced Inputs712 VDC O

18Figure 5 Evolution 400e Monaural Amplifier Back Panel3 Loudspeaker Binding Posts4 CAST Input5 Single-ended Input6 Balanced Input712 VDC Out/In (12

1919Figure 5 Evolution e Series Monaural Amplifier Back Panel (Evolution 600e shown)3 Loudspeaker Binding Posts4 CAST Input5 Single-ended Input6 Bala

Evolution 302e, 402e, 2250e, 403e, 3250e, 400e 600e and 900e Power Amplifiers Owner’s Reference, V1.0Krell Industries, LLC45 Connair RoadOrange, CT 06

20(SECTION THREE: Anatomy of an Evolution e Series Amplifier continued)Figure 6 Evolution e Series Stereo Amplifier Back Panel (Evolution 2250e shown

21(SECTION THREE: Anatomy of an Evolution e Series Amplifier continued)Figure 7 Evolution e Series Three Channel Amplifier Back Panel (Evolution 325

-22Back Panel DescriptionSee Figure 2, 3, 4 and 5 on the previous pagesThe amplifier back panel provides access to the input and output connections, 1

23(SECTION THREE: Anatomy of an Evolution e Series Amplifier continued)8 Backlight ControlExt In. Connect a 12 V trigger to the Ext In input connector

24Back Panel DescriptionSee Figure 6 and 7 on the previous pagesThe amplifier back panel provides access to the input and output connections, 12 V tri

25(SECTION THREE: Anatomy of an Evolution e Series Amplifier continued)Power7 IEC Power Cord ReceptacleThe power receptacle is for use with the provid

26SECTION FOURConnecting an Evolution e Series Amplifier to Your SystemThis section describes Evolution e Series amplifier connections. Each Evolution

27Evolution DC Protection Circuitry/Using Tube PreamplifiersThe high DC output of tube preamplifiers may exceed the active DC protection circuitry oft

28(SECTION FOUR: Connecting an Evolution e Series Amplifier to Your System continued)Figure 8 Connection Diagram

29Evolution e Series Amplifier OperationThe Evolution e Series amplifiers are easy to operate.IMPORTANTWhen powering up any system, turn the amplifier

3ContentsList of Illustrations, page 4A Letter from Krell, page 5SECTION ONE: Evolution e Series Amplifier Features and Technology, page 6Features, Re

30Troubleshooting System NoiseAC grounding becomes critical when connecting high-performance audio components.When you mix and match high-performance

31Error CodesIn the event of a problem, the power status indicator (2) will flash error code(s) in red.Errors are identified by a sequence flashes. Th

32Questions and AnswersQ. Should I leave my Evolution e Series amplifier on at all times?A. For maximum amplifier performance, leave the back panel po

33WarrantyKrell products have a limited warranty. Amplifiers, preamplifiers, preamp/processors, andreceivers carry a limited warranty of five years fr

34If the product is serviced by a distributor who did not import the unit, there may be a chargefor service, even if the product is within the warrant

35Return Authorization ProcedureHow to Expedite ServiceIf you believe there is a problem with your component, please contact your dealer,distributor,

SpecificationsMeasurementEvolution 302e AmplifierEvolution 402e AmplifierFREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.10 dB <0.5 Hz to 180 kHz +0, –3

37(Specifications continued)Measurement Evolution 403e Amplifier Evolution 400e Monaural AmplifierFREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.18 dB<0

38(Specifications continued)Measurement Evolution 600e Monaural Amplifier Evolution 900e Monaural AmplifierFREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.1

39Measurement Evolution 2250e Amplifier Evolution 3250e AmplifierFREQUENCY RESPONSE20 Hz to 20 kHz +0, –0.07 dB <0.3 Hz to 150 kHz +0, –3 dB20 Hz t

4List of IllustrationsFigure 1, page 13Evolution e Series Amplifier Front PanelFigure 2, page 15Evolution 302e Back PanelFigure 3, page 16Evolution 40

OWNER’S REFERENCEV 1.0KRELLINDUSTRIES, LLC45 CONNAIR ROADORANGE, CT06477-3650 USATELL: 203-298-4000 • FAX: 203-891-2028E-MAIL: [email protected]

5A Letter from Krell IndustriesDear Audio Enthusiast,Thank you for your purchase of a Krell Evolution e Series amplifier. No component in an audiosyst

6SECTION ONEEvolution e Series Amplifier Features and Technology This section describes the innovative features and technology of the Evolution e Seri

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 and CASTpreserves 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