Krell
Amplifiers
Preamplifiers
Best Known For
Amplifiers
/
Used Products
177
 Available
Average Price
$10,001-$20,000
Brand Popularity
46
 of 900+
Products Listed
12
Review Count
24
Founding Year
1980
Headquarters
United States
Krell
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What's unique about the brand

Krell is a hifi brand whose amplifiers use iBias technology to operate in Class A up to full power without excessive heat, while maintaining the ability to double power output as speaker impedance halves. Their amplifiers feature XD technology for better control over speaker drivers, and modern models like the K-300i include Bluetooth, HDMI, and streaming features for contemporary audio setups.

What reviewers are saying

We read all the reviews. Here's what reviewers feel most strongly about:

  • The iBias technology allows Krell amplifiers to operate in Class A, delivering its sonic benefits, without the typical heat and power consumption drawbacks, making it suitable for modern lifestyles and versatile placement.
  • Krell products often incorporate fully balanced, fully complementary circuits throughout the entire audio path, reducing noise and improving the slew rate for faster transient response.
  • The power supply is robustly designed, allowing for consistent doubling of power as impedance halves down to very low ohm loads, ensuring excellent speaker control across a wide range of speaker types.

Our favorite reviewer quotes:

  • "I immediately heard a muscular, well-textured bottom end as the Solo 575s exerted a superior grip on the woofers of my Wilson Audio Specialties Alexandria XLF speakers, compared to that of my reference DarTZeel NHB-458 monoblocks. The weight and power of the Krell amps were undeniable: They had a bottom-end whomp that reminded me of Bel Canto Design's $50,000 Black amplification system—and that's a compliment." (https://www.stereophile.com/content/krell-solo-575-monoblock-power-amplifier)
  • "The nonchalance with which the Krell powerhouse hurls the timpani cascades into the room is astounding. While you can hear how my Naim SuperNait has to push with noticeable effort in order to adequately place the sound development of the piece in the room, the Krell K-300i conjures Nakamura's wild playing out of the speakers as if from nowhere and also maintains the necessary tension when the timpani notes slowly fade out to pianissimo." (https://www.fidelity-magazine.com/krell-k-300i)
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Our interview with the brand

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From Julian's interview with
.

Lineup comparison

We think it's helpful to understand how their products compare. To learn more about each, scroll to the section above to click through to individual product pages.

K-300i Integrated

  • Positioning: Positioned as an all-in-one solution for modern audiophiles, combining amplification and digital streaming capabilities.
  • Description: Delivers 150 watts per channel with advanced digital streaming capabilities, making it ideal for those who want a compact yet powerful system. Unlike the Duo XD series, which focuses on pure amplification, it offers built-in streaming services like Tidal and Spotify, making it perfect for users who prioritize convenience and digital integration. Its HDMI 2.0 inputs with 4K UHD passthrough also set it apart from the Solo XD series, catering to users with home theater setups.

Duo XD

  • Positioning: Designed for high-end stereo amplification, offering models with varying power outputs to suit different needs.
  • Description: Features Krell's iBias technology to deliver Class A sound quality with greater efficiency, making them suitable for audiophiles seeking high fidelity without excessive heat. Compared to the K-300i, the series focuses solely on amplification, providing more power and control for larger setups. Its advanced cooling system and protection circuitry make it more robust than the K-300i.

Solo XD

  • Positioning: Krell's line of mono amplifiers, offering high power and precision for dedicated audio channels.
  • Description: With high power output and Krell's CAST technology, provides excellent sound quality and system integration. Unlike the Duo XD, which is stereo-focused, the mono design allows for more precise channel separation and power delivery. Its ability to deliver 575 watts into 8 ohms makes it more powerful than the Duo XD.

KSA-i400

  • Positioning: Krell's flagship stereo amplifier, offering the highest power and performance in their lineup.
  • Description: The groundbreaking KSA-i400's 400 watts per channel and advanced iBias technology make it the pinnacle of Krell's amplification offerings, providing exceptional power and clarity. Compared to the Solo XD, it offers stereo amplification with even greater power. Its robust build and high-current power supply ensure it can drive any speaker with ease, setting it apart from the more integrated-focused K-300i.
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Julian Shapiro
ExtremeHiFi Writer

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What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

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Julian Shapiro
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What are two key technological innovations or strong opinions that differ you from other brands?

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What are your favorite tracks for showcasing the strength of your products?

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Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
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Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

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Julian Shapiro
ExtremeHiFi
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