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Krell Industries Evolution 600 - page 1
OWNER’S REFERENCE EVOLUTION EVOLUTION AMPLIFIERS 302 AND 402 STEREO 403 THREE-CHANNEL 400, 600, AND 900 MONAURAL ...
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Krell Industries Evolution 600 - page 2
Evolution 302, 402, 403, 400, 600 and 900 Power Amplifiers Owner’ s Reference, v 08.0 Krell Industries, Inc. 45 Connair Road Orange, CT 06477 -3650 USA This product complies with the EMC dir ective (89/ 336 / EEC) and the low-voltage dir ective (73/ 23/ EEC). IMPOR T ANT SAFETY INSTRUCTIONS 1. Read Instructions. 2. Keep these Instructions. 3. Hee ...
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Krell Industries Evolution 600 - page 3
3 Contents List of Illustrations, page 4 A Letter from Dan D’Agostino, page 5 SECTION ONE: Evolution Amplifier Features and T echnology , page 6 Featur es, Revolutionar y Krell CAST T echnology , Definition of T erms SECTION TWO: Unpacking and Placement, page 11 Opening the Evolution Amplifier Shipping Carton SECTION THREE: Anatomy of the Evoluti ...
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Krell Industries Evolution 600 - page 4
4 List of Illustrations Figure 1, page 1 3 Evolution Amplifier Front Panel Figure 2, page 1 5 Evolution 302 Stereo Back Panel Figure 3, page 1 6 Evolution 402 Stereo Amplifier Back Panel Figur e 4, page 1 7 Evolution 403 Three-channel Amplifier Back Panel Figur e 5, page 1 8 Evolution 400 Monaural Amplifier Back Panel Figur e 5, page 19 Evolution M ...
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Krell Industries Evolution 600 - page 5
A Letter fr om Dan D’Agostino Dear Audio Enthusiast, Thank you for your purchase of a Kr ell Evolution Series amplifier . Evolution Series amplifiers continue my quest for amplifiers that deliver absolute truth in music repr oduction. Active Cascode T opology is a unique cir cuit technique that minimizes distortion by applying from 2 to 3 times m ...
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Krell Industries Evolution 600 - page 6
6 SECTION ONE Evolution Amplifier Featur es and T echnology This section describes the innovative features and technology of the Evolution Series amplifiers, and defines CAST and other key terms used in this refer ence. There ar e six amplifier models in the Evolution Series: the 302 Stereo Power Amplifier , the 402 Stereo Power Amplifier , the 403 ...
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Krell Industries Evolution 600 - page 7
7 Revolutionary Kr ell CAST T echnology Current Audio Signal T ransmission, termed CAST , is a r evolutionary method of connecting analog audio components for unparalleled sonic performance. Innovative engineering combines the new Krell CAST cir cuitry with existing Krell Current Mode technology to cr eate entire CAST systems that r eproduce music ...
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Krell Industries Evolution 600 - page 8
8 Krell Curr ent Mode maintains the integrity of the signal within the component and CAST preserves the transmitted signal between components. T ogether , CAST and Krell Curr ent Mode technologies unify separate Krell components into a single global circuit. Krell Curr ent Mode technology enjoys bandwidth increases up to an order of magnitude gr ea ...
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Krell Industries Evolution 600 - page 9
9 Definition of T erms The following are definitions of key terms used in this owner’ s refer ence: Inputs and Outputs Balanced A symmetrical input or output circuit that has equal impedance fr om both input terminals to a common ground r eference point. The industry standar d for profes- sional and sound r ecor ding installations, balanced conne ...
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Krell Industries Evolution 600 - page 10
10 T echnology Active Cascode T opology A unique circuit technique that minimizes distortion by applying fr om 2 to 3 times more active devices to each gain stage ther eby reducing the load on individual devices and improving cir cuit-wide linearity . Krell Curr ent Mode A proprietary Kr ell circuit topology in which the audio gain stages of a comp ...
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Krell Industries Evolution 600 - page 11
11 Unpacking and Placement This section describes the procedur es for safely unpacking and placing your Evolution amplifier . The amplifier and accessories are shipped in 1 carton. The dimensions of the amplifier are shown in the specifications section starting on page 31. T wo people are needed to remove the Evolution amplifier fr om its shipping ...
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Krell Industries Evolution 600 - page 12
12 Placement Before you install an Evolution amplifier into your system, please follow the guide- lines in this section to select a location for your component. This will facilitate a clean, trouble-fr ee installation. Place the amplifier on a firm, level surface, away from excessive heat, humidity , or moisture. Each Evolution amplifier r equires ...
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Krell Industries Evolution 600 - page 13
13 SECTION THREE Anatomy of an Evolution Amplifier This section describes Evolution amplifier functions. Figure 1 Evolution Amplifier Front Panel ( Evolution 402 shown ) 1 Power Button 2 Power Status Indicator Power continue d ...
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Krell Industries Evolution 600 - page 14
14 Fr ont Panel Description See Figure 1 on the previous page Evolution amplifier front panel functions ar e described below: Power 1 Power Button Press this button to place the Evolution amplifier in operational mode. 2 Power Status Indicator The power status indicator is illuminated in red when the amplifier is in stand- by mode. The indicator il ...
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Krell Industries Evolution 600 - page 15
15 Figure 2 Evolution 302 Stereo Amplifier Back Panel 3 Loudspeaker Binding Posts 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V T rigger) 8 Backlight Control 9 IEC Power Cord Receptacle 10 Power Breaker Switch Inputs Outputs Remote Power continue d ...
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Krell Industries Evolution 600 - page 16
16 Figure 3 Evolution 402 Stereo Amplifier Back Panel 3 Loudspeaker Binding Posts 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V T rigger) 8 Backlight Control 9 IEC Power Cord Receptacle 10 Power Breaker Switch Inputs Outputs Remote Power ...
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Krell Industries Evolution 600 - page 17
17 Figure 4 Evolution 403 Multi-channel Amplifier Back Panel 3 Loudspeaker Binding Posts 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V T rigger) 8 Backlight Control 9 IEC Power Cord Receptacle 10 Power Br eaker Switch Inputs Outputs Remote Power ( SECTION THREE: Anatomy of an Evolution Amplifier continued) continue d ...
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Krell Industries Evolution 600 - page 18
18 Figure 5 Evolution 400 Monaural Amplifier Back Panel 3 Loudspeaker Binding Posts 4 CAST Input 5 Single-ended Input 6 Balanced Input 7 12 VDC Out/In (12 V T rigger) 8 Backlight Control 9 IEC Power Cord Receptacle 10 Power Br eaker Switch Outputs Remote Power ...
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Krell Industries Evolution 600 - page 19
19 Figure 6 Evolution Monaural Amplifier Back Panel ( Evolution 600 shown ) 3 Loudspeaker Binding Posts 4 CAST Input 5 Single-ended Input 6 Balanced Input 7 12 VDC Out/In (12 V T rigger) 8 Backlight Control 9 IEC Power Cord Receptacle 10 Power Br eaker Switch Inputs Outputs Remote Power ...
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Krell Industries Evolution 600 - page 20
20 Back Panel Description See Figures 2, 3, 4, 5, and 6 on the previous pages The amplifier back panel provides access to the input and output connections, 12 V trigger inputs and outputs, and the AC power connection and switch. Back panel features and their descriptions follow: Outputs 3 Loudspeaker Binding Posts (one pair per channel) Each channe ...
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Krell Industries Evolution 600 - page 21
21 Remote Connections 7 12 VDC In/Out (12 V T rigger) The 12 V trigger allows you to turn the Evolution amplifier on or to stand-by from other components. Out. The output sends 12 VDC (12 V trigger) power on/off signals to other Kr ell components and other devices that incorporate a 12 V trigger , allowing whole syste ms or pa rts of systems to be ...
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Krell Industries Evolution 600 - page 22
22 SECTION FOUR Connecting an Evolution Amplifier to Y our System This section describes Evolution amplifier connections. Each Evolution amplifier channel has a CAST 4-pin connector , a balanced input via an XLR connector , a single-ended RCA connector , and a pair of loudspeaker binding posts. The rear panel also has 12 VDC trigger input and outpu ...
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Krell Industries Evolution 600 - page 23
23 Evolution DC Pr otection Circuitry/Using T ube Pr eamplifiers The high DC output of tube preamplifiers may exceed the active DC pr otection circuitry of the Evolution amplifiers. Excessive DC level in a signal can damage amplifiers, loudspeakers, or both. The single-ended inputs of the Evolution ampli- fiers are capacitor -coupled and DC does no ...
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Krell Industries Evolution 600 - page 24
24 Evolution Amplifier Operation The Evolution amplifiers are easy to operate. IMPORT ANT When powering up any system, turn the amplifier on last. When powering down, turn it off first. This will prevent any turn-on and turn-off thumps in your loudspeakers. Always mute or fully attenuate the preamplifier level when switching sources. Do not change ...
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Krell Industries Evolution 600 - page 25
25 T r oubleshooting System Noise AC grounding becomes critical when connecting high-performance audio compo- nents. When you mix and match high-performance audio components, each with its own ground potential, a low fr equency hum may occur in one or both loud- speakers. This often occurs when introducing a new component into a system. If this hap ...
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Krell Industries Evolution 600 - page 26
26 Err or Codes In the event of a problem, the power status indicator (2) will flash err or code(s) in red. Err ors are identified by a sequence of 3, 4, or 5 flashes. Ther e is a pause between codes, and in the case where ther e is only one error code, the same code is repeated. Diagnostic Code Possible Condition Course of Action 3 flashes Excessi ...
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Krell Industries Evolution 600 - page 27
27 Questions and Answers Q. Should I leave my Evolution amplifier on at all times? A. For maximum amplifier performance, leave the back panel power breaker switch on at all times. This places the amplifier in stand-by mode. Evolution amplifiers are designed to be power ed on and off fr om stand-by , using the front panel power button. This eliminat ...
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Krell Industries Evolution 600 - page 28
28 W arranty Krell pr oducts have a limited warra nty . Amplifiers, preamplifiers, preamp/pr ocessors, and receivers carry a limited warranty of five years for parts and labor on cir cuitry . Loudspeakers carry a limited warranty of five years for parts and labor . CD and DVD players carry a limited warranty of five years for parts and labor on cir ...
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Krell Industries Evolution 600 - page 29
29 If the product is serviced by a distributor who did not import the unit, ther e may be a char ge for service, even if the product is within the warranty period. Freight to the factory is your r esponsibility . Return freight within the United States (U.S.A.) is included in the warranty . If you have pur chased your Krell pr oduct out- side the U ...
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Krell Industries Evolution 600 - page 30
Retur n Authorization Pr ocedur e How to Expedite Service If you believe there is a pr oblem with your component, please contact your deal- er , distributor , or the Krell factory to discuss the problem before you return the component for repair . T o expedite service, you may wish to complete and e-mail the Service Request Form in the Service sect ...
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Krell Industries Evolution 600 - page 31
Specifications Measurement Evolution 302 Ster eo Amplifier Evolution 402 Stereo Amplifier FREQUENCY RESPONSE 20 Hz to 20 kHz +0, –0.10 dB <0.5 Hz to 180 kHz +0, –3 dB 20 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB SIGNAL-TO-NOISE RA TIO Wideband, unweighted, referr ed to full power output “A” weighted >107 dB >117 ...
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Krell Industries Evolution 600 - page 32
32 ( Specifications continued) Measurement Evolution 403 3-channel Amplifier Evolution 400 Monaural Amplifier F REQUENCY RESPONSE 2 0 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB S IGNAL-TO-NOISE RA TIO Wideband, unweighted, referr ed to full power output “A” weighted >106 dB >116 dB GAIN 25.4 dB TOT AL HARMONIC DISTORTIO ...
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Krell Industries Evolution 600 - page 33
33 ( Specifications continued) Measurement Evolution 600 Monaural Amplifier Evolution 900 Monaural Amplifier F REQUENCY RESPONSE 2 0 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB 2 0 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB S IGNAL-TO-NOISE RA TIO Wideband, unweighted, referr ed to full power output “A” weig ...
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Krell Industries Evolution 600 - page 34
O WNER’S REFERENCE V08.0 KRELL INDUSTRIES, INC. 45 CONNAIR ROAD ORANGE, CT 06477-3650 USA TELL: 203-298-4000 • F AX: 203-891-2028 E-MAIL: sales@krellonline.com http://www .krellonline.com E VOLUTION AMPLIFIERS 302 AND 402 STEREO 403 THREE-CHANNEL 400, 600, AND 900 MONAURAL ...
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