Sound Science Personified™
Krell is a company that very much rejoices in the concept of a ‘house sound’; a set of performance traits you can reliably identify in all the company’s products. A one word summary of this would be ‘MUSCULAR.’
What Is A Stereo Amplifier
A Stereo amplifier is the heart of any high-quality audio system, enhancing the audio signal from your source devices and powering your speakers to produce clear, powerful, and immersive sound. At its core, a stereo amplifier takes a low-power audio signal and amplifies it to a level that can drive your speakers. Let's delve into its components and use cases.
Check Out Our Line Up of Stereo Amp
-
Home Audio Systems: Stereo amplifiers serve as the centerpiece for home audio systems, enhancing the audio quality of music, movies, and gaming.
-
Audiophile Listening: Enthusiasts appreciate the precision and clarity stereo amplifiers bring to their high-end audio setups.
-
Professional Studios: In recording studios, stereo amplifiers ensure accurate audio playback during the mixing and mastering process.
Why Krell?
Unwavering Commitment: We combine decades of expertise with a dedication to honoring our heritage while embracing cutting-edge technology and a commitment to innovation.
Transcending Limits: Krell's amplifiers are designed to push the boundaries of Hifi audio, delivering a listening experience that transcends time and space.
CORE COMPONENTS
At Krell Industries, we've mastered the art of audio amplification, setting the gold standard for high-end stereo amplifiers. Krell's stereo amplifiers are known for their exceptional quality and performance. The core components that make up Krell's stereo amplifiers are meticulously designed and engineered to deliver uncompromised audio excellence. Here are the key core components you'll find in Krell's stereo amplifiers:
-
At the heart of every Krell stereo amplifier is the amplification circuitry. Krell uses advanced and proprietary technologies, such as iBias, this proprietary technology ensures that our amplifiers operate in Class A, delivering uncompromised sound quality with unmatched efficiency. Class A is known for its high-quality sound reproduction. This circuitry amplifies the low-voltage audio signal from your source components to a level suitable for driving your speakers.
-
The power supply in Krell amplifiers plays a crucial role in providing the necessary electrical power to the amplification circuitry. Krell designs robust and high-current power supplies to ensure stability and deliver ample power to meet the demands of dynamic audio content.
-
Krell utilizes XD (Crossed-Axis Differential) technology to provide precise control over speaker drivers. This technique minimizes distortion and allows for extraordinary musical dynamics, depth, and dimensionality in the audio output.
-
Krell's amplifiers achieve damping factors well above the industry standard. Krell's amplifiers are engineered to have exceptionally high damping factors. A high damping factor ensures better control over the movement of the speaker drivers, resulting in improved accuracy and reduced distortion for your speakers for unparalleled performance.
-
Krell amplifiers are renowned for their build quality. They often feature robust chassis, premium components, and meticulous craftsmanship to ensure long-term reliability and durability.
These core components, combined with Krell's commitment to innovation and sound quality, contribute to the exceptional performance and reputation of their stereo amplifiers. Whether for audiophile listening, professional studio use, or high-end home audio systems, Krell's amplifiers consistently deliver top-tier audio experiences.
Our Flagship Stereo Amp
The Krell KSA-i400 is a flagship stereo amplifier that embodies the pinnacle of audio engineering. Crafted by Krell Industries, a renowned name in high-end audio, this amplifier combines cutting-edge technology with meticulous craftsmanship.
The Krell KSA i400 amplifier goes great with our Vanguard Universal DAC, allowing ease of use and seamless digital streaming. Together they pair best with speakers of a comparable quality such as KEF, Focal, Martin Logan, Bowers Wilkins, etc.
DUO STEREO AMPLIFIER LINE
The sound is open and unconstrained, in a manner that rivals live performance and the true sound of voices and instruments.
-
Frequency response
20 Hz to 20 kHz +0, -0.08 dB
0.5 Hz to 100 kHz +0, -3 dB
Signal-to-noise ratio
>95 dB, wideband, unweighted, referred to full power output
>112 dB, “A”-weighted
Gain
25.8 dB
Total harmonic distortion
<0.03% at 1 kHz, at 125 W, 8 Ω
<0.17% at 20 kHz, at 125 W, 8 Ω
Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ
Input sensitivity
Single-ended or balanced: 1.63 V RMS
Output power
125 W RMS at 8 Ω
250 W RMS at 4 Ω
Output voltage
89.4 V peak-to-peak
31.6 V RMS
Output current
18 A peak
Slew rate
40 V/μs
Output impedance
<0.015Ω, 20 Hz to 20 kHz
Damping factor
>530, 20 Hz to 20 kHz, referred to 8 Ω
Krell Duo 125 XD Stereo Amplifier
Power consumption
Standby: 1 W
Idle: 58 W
Maximum: 1350 W
Heat output
Standby: 3.42 BTU/hr.
Idle: 198 BTU/hr.
Maximum: 4617 BTU/hr.
Inputs
2 single-ended via RCA connector
2 balanced via XLR connector
Outputs
2 pairs binding posts
Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D
Weight
60 lbs., 27.3 kg (shipping)
50 lbs., 22.7 kg (unit only)
-
Frequency response
20 Hz to 20 kHz +0, -0.08 dB
0.5 Hz to 100 kHz +0, -3 dB
Signal-to-noise ratio
>95 dB, wideband, unweighted, referred to full power output
>115 dB, “A”-weighted
Gain
26.2 dB
Total harmonic distortion
<0.03% at 1 kHz, at 175 W, 8 Ω
<0.13% at 20 kHz, at 175 W, 8 Ω
Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ
Input sensitivity
Single-ended or balanced: 1.84 V RMS
Output power
175 W RMS at 8 Ω
350 W RMS at 4 Ω
Output voltage
106 V peak-to-peak
37 V RMS
Output current
13 A peak
Slew rate
40 V/μs
Output impedance
<0.015Ω, 20 Hz to 20 kHz
Damping factor
>530, 20 Hz to 20 kHz, referred to 8 Ω
Krell Duo 175 XD Stereo Amplifier
Power consumption
Standby: 1 W
Idle: 73 W
Maximum: 1500 W
Heat output
Standby: 3.42 BTU/hr.
Idle: 250 BTU/hr.
Maximum: 5137 BTU/hr.
Inputs
2 single-ended via RCA connector
2 balanced via XLR connector
Outputs
2 pairs binding posts
Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D
Weight
70 lbs., 31.8 kg (shipping)
60 lbs., 27.3 kg (unit only)
-
Frequency response
20 Hz to 20 kHz +0, -0.13 dB
0.5 Hz to 100 kHz +0, -3 dB
Signal-to-noise ratio
>98 dB, wideband, unweighted, referred to full power output
>116 dB, “A”-weighted
Gain
26.2 dB
Total harmonic distortion
<0.045% at 1 kHz, at 400 W, 8 Ω
<0.17% at 20 kHz, at 400 W, 8 Ω
Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ
Input sensitivity
Single-ended or balanced: 2.4 V RMS
Output power
300 W RMS at 8 Ω
540 W RMS at 4 Ω
Output voltage
138 V peak-to-peak
49 V RMS
Output current
16 A peak
Slew rate
40 V/μs
Output impedance
<0.007Ω, 20 Hz to 20 kHz
Damping factor
>1140, 20 Hz to 20 kHz, referred to 8 Ω
Krell Duo 300 XD Stereo Amplifier
Power consumption
Standby: 4 W
Idle: 180 W
Maximum: 1600 W
Heat output
Standby: 13.7 BTU/hr.
Idle: 615 BTU/hr.
Maximum: 5677 BTU/hr.
Inputs
2 single-ended via RCA connector
2 balanced via XLR connector
Outputs
2 pairs binding posts
Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D
Weight
80 lbs., 36.4 kg (shipping)
70 lbs., 31.8 kg (unit only)
Krell amps make it clear that they have plenty of power but they wield it with a level of dexterity that leaves you feeling that none of the output is being delivered without the appropriate control.
—Avforums.com review by Ed Selley
Explore Krell's Stereo Amplifiers and Elevate Your Audio Experience.