Related Manuals for Krell Industries Evolution 400
Summary of Contents for Krell Industries Evolution 400
- Page 1 EVOLUTION E V O L U T I O N A M P L I F I E R S 3 0 2 A N D 4 0 2 S T E R E O 4 0 3 T H R E E - C H A N N E L 4 0 0 , 6 0 0 , A N D...
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Page 2: Important Safety Instructions
11. The ventilation grids on the top of every Evolution amplifier, the ventilation grids on the back of the Evolution 302 and 400 amplifiers, and the space underneath every Evolution amplifier must be unobstructed at all times during operation. Do not place flammable material above or beneath an Evolution amplifier. -
Page 3: Table Of Contents
Contents List of Illustrations, page 4 A Letter from Dan D’Agostino, page 5 SECTION ONE: Evolution Amplifier Features and Technology, page 6 Features, Revolutionary Krell CAST Technology, Definition of Terms SECTION TWO: Unpacking and Placement, page 11 Opening the Evolution Amplifier Shipping Carton SECTION THREE: Anatomy of the Evolution Amplifier, page 13 Front Panel Description, and Back Panel Description SECTION FOUR: Connecting an Evolution Amplifier to Your System, page 22... -
Page 4: List Of Illustrations
Evolution 302 Stereo Back Panel Figure 3, page 16 Evolution 402 Stereo Amplifier Back Panel Figure 4, page 17 Evolution 403 Three-channel Amplifier Back Panel Figure 5, page 18 Evolution 400 Monaural Amplifier Back Panel Figure 5, page 19 Evolution Monaural Amplifier Back Panel... -
Page 5: A Letter From Dan D'agostino
A Letter from Dan D’Agostino Dear Audio Enthusiast, Thank you for your purchase of a Krell Evolution Series amplifier. Evolution Series amplifiers continue my quest for amplifiers that deliver absolute truth in music reproduction. Active Cascode Topology is a unique circuit technique that minimizes distortion by applying from 2 to 3 times more active devices to each gain stage. -
Page 6: Section One: Evolution Amplifier Features And Technology
There are six amplifier models in the Evolution Series: the 302 Stereo Power Amplifier, the 402 Stereo Power Amplifier, the 403 Three-channel Power Amplifier, the 400 Monaural Power Amplifier, the 600 Monaural Power Amplifier, and the 900 Monaural Power Amplifier. The compact chassis of the 400 Monaural Power Amplifier contains all of the high power, wide bandwidth, and low noise character- istics designed into all Evolution Series amplifiers. -
Page 7: Revolutionary Krell Cast Technology
Revolutionary Krell CAST Technology Current Audio Signal Transmission, termed CAST, is a revolutionary method of connecting analog audio components for unparalleled sonic performance. Innovative engineering combines the new Krell CAST circuitry with existing Krell Current Mode technology to create entire CAST systems that reproduce music with incredible range, tonality, and precision. - Page 8 (SECTION ONE: Evolution Amplifier Features and Technology continued) Krell Current Mode maintains the integrity of the signal within the component and CAST preserves the transmitted signal between components. Together, CAST and Krell Current Mode technologies unify separate Krell components into a single global circuit.
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Page 9: Definition Of Terms
Definition of Terms The following are definitions of key terms used in this owner’s reference: Inputs and Outputs Balanced A symmetrical input or output circuit that has equal impedance from both input terminals to a common ground reference point. The industry standard for profes- sional and sound recording installations, balanced connections have 6 dB more gain than single-ended connections and allow the use of long interconnect cables. - Page 10 (SECTION ONE: Definition of Terms continued) Technology Active Cascode Topology A unique circuit technique that minimizes distortion by applying from 2 to 3 times more active devices to each gain stage thereby reducing the load on individual devices and improving circuit-wide linearity. Krell Current Mode A proprietary Krell circuit topology in which the audio gain stages of a component operate in the current domain rather than the voltage domain.
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Page 11: Section Two: Unpacking And Placement
SECTION Unpacking and Placement This section describes the procedures 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. Two people are needed to remove the Evolution amplifier from its shipping box safely and easily. -
Page 12: Ac Power Guidelines
(SECTION TWO: Unpacking and Placement continued) 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-free installation. Place the amplifier on a firm, level surface, away from excessive heat, humidity, or moisture. -
Page 13: Section Three: Anatomy Of The Evolution Amplifier
THREE SECTION Anatomy of an Evolution Amplifier This section describes Evolution amplifier functions. Figure 1 Evolution Amplifier Front Panel (Evolution 402 shown) 1 Power Button Power 2 Power Status Indicator continued... -
Page 14: Front Panel Description
(SECTION THREE: Anatomy of an Evolution Amplifier continued) Front Panel Description See Figure 1 on the previous page Evolution amplifier front panel functions are 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. -
Page 15: Figure 2
Figure 2 Evolution 302 Stereo Amplifier Back Panel Outputs 3 Loudspeaker Binding Posts Inputs 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V Trigger) Remote 8 Backlight Control Power 9 IEC Power Cord Receptacle... -
Page 16: Figure 3
Figure 3 Evolution 402 Stereo Amplifier Back Panel Outputs 3 Loudspeaker Binding Posts Inputs 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V Trigger) Remote 8 Backlight Control Power 9 IEC Power Cord Receptacle... -
Page 17: Figure 4
(SECTION THREE: Anatomy of an Evolution Amplifier continued) Figure 4 Evolution 403 Multi-channel Amplifier Back Panel Outputs 3 Loudspeaker Binding Posts Inputs 4 CAST Inputs 5 Single-ended Inputs 6 Balanced Inputs 7 12 VDC Out/In (12 V Trigger) Remote 8 Backlight Control Power 9 IEC Power Cord Receptacle 10 Power Breaker Switch... -
Page 18: Figure 5
Figure 5 Evolution 400 Monaural Amplifier Back Panel Outputs 3 Loudspeaker Binding Posts 4 CAST Input 5 Single-ended Input 6 Balanced Input 7 12 VDC Out/In (12 V Trigger) Remote 8 Backlight Control 9 IEC Power Cord Receptacle Power 10 Power Breaker Switch... -
Page 19: Figure 5
Figure 6 Evolution Monaural Amplifier Back Panel (Evolution 600 shown) Outputs 3 Loudspeaker Binding Posts Inputs 4 CAST Input 5 Single-ended Input 6 Balanced Input 7 12 VDC Out/In (12 V Trigger) Remote 8 Backlight Control 9 IEC Power Cord Receptacle Power 10 Power Breaker Switch... -
Page 20: Back Panel Description
(SECTION THREE: Anatomy of an Evolution Amplifier continued) 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) -
Page 21: Remote Connections
Remote Connections 7 12 VDC In/Out (12 V Trigger) 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 Krell components and other devices that incorporate a 12 V trigger, allowing whole systems or parts of systems to be easily controlled remotely. -
Page 22: Balanced Connections
FOUR SECTION Connecting an Evolution Amplifier to Your 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 outputs, and a backlight remote trigger input. -
Page 23: Connection Steps
Evolution DC Protection Circuitry/Using Tube Preamplifiers The high DC output of tube preamplifiers may exceed the active DC protection 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 not pass through. -
Page 24: Section Five: Evolution Amplifier Operation
FIVE SECTION Evolution Amplifier Operation The Evolution amplifiers are easy to operate. IMPORTANT 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. -
Page 25: How To Evaluate Amplifier Operation
SECTION Troubleshooting 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 frequency hum may occur in one or both loud- speakers. This often occurs when introducing a new component into a system. If this happens when you place the Evolution amplifier into your system, follow these simple troubleshooting steps. -
Page 26: Error Codes
(SECTION SIX: Troubleshooting continued) Error Codes In the event of a problem, the power status indicator (2) will flash error code(s) in red. Errors are identified by a sequence of 3, 4, or 5 flashes. There is a pause between codes, and in the case where there is only one error code, the same code is repeated. -
Page 27: Section Seven: Questions And Answers
SEVEN SECTION 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 powered on and off from stand-by, using the front panel power button. -
Page 28: Warranty
Warranty Krell products have a limited warranty. Amplifiers, preamplifiers, preamp/processors, and receivers carry a limited warranty of five years for parts and labor on circuitry. 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 circuitry, and three years for parts and labor on mechanical parts. - Page 29 If the product is serviced by a distributor who did not import the unit, there may be a charge for service, even if the product is within the warranty period. Freight to the factory is your responsibility. Return freight within the United States (U.S.A.) is included in the warranty.
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Page 30: Return Authorization Procedure
Return Authorization Procedure How to Expedite Service If you believe there is a problem with your component, please contact your deal- er, distributor, or the Krell factory to discuss the problem before you return the component for repair. To expedite service, you may wish to complete and e-mail the Service Request Form in the Service section of our website at: http://www.krellonline.com To contact the Krell Service Department:... -
Page 31: Specifications
20 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB >106 dB >116 dB 25.4 dB <0.02% at 1 kHz, at 400 W, 8 Ohms <0.15% at 20 kHz, at 400 W, 8 Ohms 100 kOhms 200 kOhms 70 Ohms 3.04 V rms... - Page 32 20 Hz to 20 kHz +0, –0.18 dB <0.5 Hz to 120 kHz +0, –3 dB >106 dB >116 dB 25.4 dB <0.02% at 1 kHz, at 400 W, 8 Ohms <0.15% at 20 kHz, at 400 W, 8 Ohms 100 kOhms 200 kOhms 70 Ohms 3.04 V rms...
- Page 33 (Specifications continued) Measurement FREQUENCY RESPONSE SIGNAL-TO-NOISE RATIO Wideband, unweighted, referred to full power output “A” weighted GAIN TOTAL HARMONIC DISTORTION INPUT IMPEDANCE Single-ended Balanced CAST INPUT SENSITIVITY Single-ended or balanced CAST OUTPUT POWER OUTPUT VOLTAGE OUTPUT CURRENT SLEW RATE OUTPUT IMPEDANCE DAMPING FACTOR Referred to 8 Ohms POWER CONSUMPTION...
- Page 34 E V O L U T I O N A M P L I F I E R S 3 0 2 A N D 4 0 2 S T E R E O 4 0 3 T H R E E - C H A N N E L 4 0 0 , 6 0 0 , A N D...
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