Krell Industries Evolution 600, 900, 400 manual Hz to 20 kHz +0, -0.18 dB Hz to 120 kHz +0, -3 dB

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(Specifications continued)

Measurement

Evolution 600 Monaural Amplifier

Evolution 900 Monaural Amplifier

FREQUENCY RESPONSE

20 Hz to 20 kHz +0, –0.18 dB

20 Hz to 20 kHz +0, –0.18 dB

 

<0.5 Hz to 120 kHz +0, –3 dB

<0.5 Hz to 120 kHz +0, –3 dB

SIGNAL-TO-NOISE RATIO

 

 

Wideband, unweighted, referred to full

>110 dB

>113 dB

power output

 

 

“A” weighted

>119 dB

>122 dB

GAIN

25.4 dB

25.4 dB

TOTAL HARMONIC DISTORTION

<0.02% at 1 kHz, at 600 W, 8 Ohms

<0.02% at 1 kHz, at 900 W, 8 Ohms

 

<0.15% at 20 kHz, at 600 W, 8 Ohms

<0.15% at 20 kHz, at 900 W, 8 Ohms

 

 

 

INPUT IMPEDANCE

 

 

Single-ended

100 kOhms

100 kOhms

Balanced

200 kOhms

200 kOhms

CAST

70 Ohms

70 Ohms

INPUT SENSITIVITY

 

 

Single-ended or balanced

3.72 V rms

4.55 V rms

CAST

3.72 mA rms

4.55 mA rms

 

 

 

OUTPUT POWER

600 W rms at 8 Ohms

900 W rms at 8 Ohms

 

1200 W rms at 4 Ohms

1800 W rms at 4 Ohms

 

2400 W rms at 2 Ohms

3600 W rms at 2 Ohms

OUTPUT VOLTAGE

196 V peak-to-peak

240 V peak-to-peak

 

69 V rms

85 V rms

OUTPUT CURRENT

49 A peak

60 A peak

SLEW RATE

100 V/s

90 V/s

OUTPUT IMPEDANCE

<0.030 Ohms, 20 Hz to 20 kHz

<0.023 Ohms, 20 Hz to 20 kHz

DAMPING FACTOR

>270, 20 Hz to 20 kHz

>350, 20 Hz to 20 kHz

Referred to 8 Ohms

 

 

 

 

 

POWER CONSUMPTION

 

 

Stand-by

260 W

440 W

Idle

410 W

650 W

Maximum

3800 W

5000 W

HEAT OUTPUT

 

 

Stand-by

890 BTU/hr.

1500 BTU/hr.

Idle

1400 BTU/hr.

2200 BTU/hr.

Maximum

5500 BTU/hr.

7700 BTU/hr.

 

 

 

INPUTS

1 single-ended via RCA connector

1 single-ended via RCA connector

 

1 balanced via XLR connector

1 balanced via XLR connector

 

1 CAST via 4-pin bayonet connector

1 CAST via 4-pin bayonet connector

OUTPUTS

1 pair Krell binding posts

1 pair Krell binding posts

 

 

 

DIMENSIONS

17.3 in. W x 9.8 in. H x 22.1 in. D

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

 

438 mm W x 248 mm H x 560 mm D

438 mm W x 248 mm H x 662 mm D

WEIGHT

 

 

Shipping

150 lb., 67.9 kg

190 lb., 86 kg

Unit only

135 lb., 61.1 kg

175 lb., 79.2 kg

 

 

 

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

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Image 33
Contents Evolution Important Safety Instructions Contents List of Illustrations Letter from Dan D’Agostino Features Evolution Amplifier Features and TechnologyHow Cast and Krell Current Mode Interact Voltage Signal Transmission Traditional Audio SystemRevolutionary Krell Cast Technology Cast BasicsCast Cable Construction Evolution CastBest Musical Performance Definition of Terms Inputs and OutputsOperation Krell Current Mode TechnologyActive Cascode Topology Opening the Evolution Amplifier Shipping Carton Unpacking and PlacementAC Power Guidelines PlacementEvolution Amplifier Front Panel Evolution 402 shown Anatomy of an Evolution AmplifierPower Button PowerPower 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 Back Panel Description OutputsInputs Power Breaker Switch IEC Power Cord ReceptacleRemote Connections VDC In/Out 12 V TriggerXLR Pin Configuration Connecting an Evolution Amplifier to Your SystemCast Connections Balanced ConnectionsConnection Steps Evolution DC Protection Circuitry/Using Tube PreamplifiersSection Five How to Evaluate Amplifier Operation Troubleshooting System NoiseDiagnostic Code Possible Condition Course of Action Error CodesQuestions and Answers Warranty Page How to Expedite Service Return Authorization ProcedureTo contact the Krell Service Department How to Return a ProductFrequency Response SpecificationsRms 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.