Krell Industries manual Measurement Evolution 403 Amplifier

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(Specifications continued)

Measurement

Evolution 403 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 Features Evolution Amplifier Features and TechnologyCast Basics Voltage Signal Transmission Traditional Audio SystemHow Cast and Krell Current Mode Interact Revolutionary Krell Cast TechnologyEvolution Cast Cast Cable ConstructionBest Musical Performance Inputs and Outputs Definition of TermsOperation Technology Krell Current ModeActive Cascode Topology Opening the Evolution Amplifier Shipping Carton Unpacking and PlacementAC Power Guidelines PlacementEvolution Amplifier Front Panel Evolution 402 shown Anatomy of an Evolution AmplifierFront Panel Description PowerPower Button Power Status IndicatorEvolution 302 Stereo Amplifier Back Panel Evolution 402 Stereo Amplifier Back Panel Evolution 403 Multi-channel Amplifier Back Panel Evolution Monaural Amplifier Back Panel Evolution 600 shown Outputs Back Panel DescriptionInputs VDC In/Out 12 V Trigger IEC Power Cord ReceptaclePower Breaker Switch Remote ConnectionsBalanced Connections Connecting an Evolution Amplifier to Your SystemXLR Pin Configuration Cast 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 Return a Product Return Authorization ProcedureHow to Expedite Service To contact the Krell Service DepartmentFrequency Response SpecificationsMeasurement Evolution 403 Amplifier Measurement Evolution 600 Amplifier Evolution 900 Amplifier WNER’S Reference Krell INDUSTRIES, INC

Evolution specifications

Krell Industries has established itself as a pioneer in high-performance audio equipment, renowned for delivering unparalleled sound quality and innovative technologies. Founded in 1980, the company quickly became synonymous with premium amplification, earning accolades from audiophiles worldwide. Over the years, Krell has evolved its product lineup to include not only amplifiers but also preamplifiers, digital audio players, and complete home theater systems.

One of the hallmark features of Krell products is their robust build quality. The company employs a strong engineering ethos that prioritizes durability and reliability in all its offerings. The iconic, heavy chassis of Krell components serves not only as a protective shell but also minimizes vibrations, which can adversely affect sound quality. This engineering strategy is evident in their signature line of amplifiers, which utilize high-grade materials and precision craftsmanship to ensure longevity and optimum performance.

Krell has also been at the forefront of technological advancements. The introduction of class A amplification circuitry is one such innovation that has been integral to the company's sound signature, allowing for minimal distortion and a rich, dynamic range. This technology ensures that even the most subtle nuances in music are reproduced with fidelity and clarity.

Moreover, Krell has embraced digital audio, creating DACs (digital-to-analog converters) and streaming devices that support high-resolution audio formats. This commitment to digital excellence reflects the company's understanding of evolving consumer preferences. Many of their devices feature wireless connectivity options, allowing users to stream music seamlessly from various sources without sacrificing audio quality.

In addition, Krell emphasizes user-friendly interfaces and versatility in its designs. Customers can often find features such as programmable presets, remote control functionality, and intuitive navigation systems, making it easier to tailor their listening experience.

Krell Industries’ evolution over the years showcases a dedication to audio fidelity, technological advancement, and stylish design. As the company continues to innovate within the high-end audio landscape, it maintains its reputation as a brand that audiophiles can trust, delivering exceptional sound experiences that stand the test of time.