Krell Industries 400, Evolution 600, 900 manual Rms at 4 Ohms

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(Specifications continued)

Measurement

Evolution 403 3-channel Amplifier Evolution 400 Monaural Amplifier

FREQUENCY RESPONSE

20 Hz to 20 kHz +0, –0.18 dB

 

<0.5 Hz to 120 kHz +0, –3 dB

SIGNAL-TO-NOISE RATIO

 

Wideband, unweighted, referred to full

>106 dB

power output

 

“A” weighted

>116 dB

GAIN

25.4 dB

TOTAL HARMONIC DISTORTION

<0.02% at 1 kHz, at 400 W, 8 Ohms

 

<0.15% at 20 kHz, at 400 W, 8 Ohms

 

 

INPUT IMPEDANCE

 

Single-ended

100 kOhms

Balanced

200 kOhms

CAST

70 Ohms

INPUT SENSITIVITY

 

Single-ended or balanced

3.04 V rms

CAST

3.04 mA rms

 

 

OUTPUT POWER

400 W rms at 8 Ohms

 

800 W rms at 4 Ohms

 

1600 W rms at 2 Ohms

OUTPUT VOLTAGE

160 V peak-to-peak

 

57 V rms

OUTPUT CURRENT

37 A peak

SLEW RATE

100 V/s

OUTPUT IMPEDANCE

<0.055 Ohms at 20 Hz

 

<0.064 Ohms, 20 Hz to 20 kHz

DAMPING FACTOR

>145 at 20 Hz

Referred to 8 Ohms

>125, 20 Hz to 20 kHz

 

 

POWER CONSUMPTION

 

Stand-by

370 W

Idle

570 W

Maximum

5000 W

HEAT OUTPUT

 

Stand-by

1270 BTU/hr.

Idle

1950 BTU/hr.

Maximum

7700 BTU/hr.

 

 

INPUTS

3 single-ended via RCA connector

 

3 balanced via XLR connector

 

3 CAST via 4-pin bayonet connector

OUTPUTS

3 pairs Krell binding posts

 

 

DIMENSIONS

17.3 in. W x 9.8 in. H x 26.1 in. D

 

438 mm W x 248 mm H x 662 mm D

WEIGHT

 

Shipping

190 lb., 86 kg

Unit only

175 lb., 79.2 kg

 

 

All operational features, functions, specifications, and policies are subject to change without notification.

continued

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Contents Evolution Important Safety Instructions Contents List of Illustrations Letter from Dan D’Agostino Evolution Amplifier Features and Technology FeaturesVoltage Signal Transmission Traditional Audio System How Cast and Krell Current Mode InteractRevolutionary Krell Cast Technology Cast BasicsBest Musical Performance Cast Cable ConstructionEvolution Cast Operation Definition of TermsInputs and Outputs Active Cascode Topology Krell Current ModeTechnology Unpacking and Placement Opening the Evolution Amplifier Shipping CartonPlacement AC Power GuidelinesAnatomy of an Evolution Amplifier Evolution Amplifier Front Panel Evolution 402 shownPower Power ButtonPower Status Indicator Front Panel DescriptionEvolution 302 Stereo Amplifier Back Panel Evolution 402 Stereo Amplifier Back Panel Evolution 403 Multi-channel Amplifier Back Panel Evolution 400 Monaural Amplifier Back Panel Evolution Monaural Amplifier Back Panel Evolution 600 shown Inputs Back Panel DescriptionOutputs IEC Power Cord Receptacle Power Breaker SwitchRemote Connections VDC In/Out 12 V TriggerConnecting an Evolution Amplifier to Your System XLR Pin ConfigurationCast Connections Balanced ConnectionsEvolution DC Protection Circuitry/Using Tube Preamplifiers Connection StepsSection Five Troubleshooting System Noise How to Evaluate Amplifier OperationError Codes Diagnostic Code Possible Condition Course of ActionQuestions and Answers Warranty Page Return Authorization Procedure How to Expedite ServiceTo contact the Krell Service Department How to Return a ProductSpecifications Frequency ResponseRms at 4 Ohms Hz to 20 kHz +0, -0.18 dB Hz to 120 kHz +0, -3 dB WNER’S Reference Krell INDUSTRIES, INC

400, 900, Evolution 600 specifications

Krell Industries is a renowned namesake in the high-end audio and home theater equipment market, revered for its cutting-edge engineering and exceptional performance. Among its standout offerings are the Krell 900, Evolution 600, and Evolution 400, each designed for audiophiles seeking to elevate their listening experience.

The Krell 900 is a powerhouse amplifier that marries high-output power with a sophisticated design. Featuring Class A/B amplification, it operates with minimal distortion, ensuring that sound quality remains pure even at high volume levels. The unit boasts a massive power supply that allows it to handle a wide variety of speaker impedances effortlessly. With its robust build and a sleek, minimalist aesthetic, the Krell 900 is not only a technical marvel but also a visual centerpiece in any audio setup.

On the other hand, the Evolution 600 represents Krell’s commitment to harnessing the latest technology to achieve superior sound. This amplifier utilizes Krell’s proprietary current mode topology, which optimizes power delivery and offers instantaneous response to dynamic audio signals. The Evolution 600 is equipped with advanced thermal management systems that keep the unit cool during extended use, ensuring reliability and longevity. Furthermore, the elegant design complements any home decor, making it a stylish and functional addition to high-end audio environments.

The Evolution 400, while slightly smaller, exemplifies Krell’s hallmark of uncompromising sound quality. It integrates many of the same high-end technologies found in its larger counterparts but in a more compact form. With a focus on delivering dynamic range and clarity, the Evolution 400 is ideal for both music and home theater applications. Advanced digital signal processing, combined with analog audio circuitry, ensures that every note and detail is captured with impeccable accuracy.

All three models prioritize connectivity and user experience, featuring a range of inputs, including balanced XLR and unbalanced RCA options, allowing seamless integration into various audio systems. Each amplifier emphasizes robust build quality, featuring heavy-duty chassis and meticulously designed circuit layouts to minimize interference and signal degradation.

In conclusion, Krell Industries’ 900, Evolution 600, and Evolution 400 amplifiers exemplify the pinnacle of audio craftsmanship. They combine innovative technologies, premium components, and stunning aesthetics, making them the perfect choice for discerning audio enthusiasts who demand nothing but the best in sound reproduction.