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Krell Illusion II preamplifier ex demo

We are selling our demonstration model of this excellent-sounding Krell Illusion II preamplifier. The Krell Illusion II is the perfect centrepiece for a world class digital and analog audio system. ...

Brand: Krell
Product Type:  
R.R.P: £7,998.00
Status: Ex-Demo


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We are selling our demonstration model of this excellent-sounding Krell Illusion II preamplifier. The Krell Illusion II is the perfect centrepiece for a world class digital and analog audio system. Added to the normal selection of balanced and single- ended inputs are five digital inputs. The digital module features AES/EBU, coaxial, and optical digital inputs for use with streaming devices or other digital sources.

Analog Inputs
  • 2 pr. balanced via XLR connectors
  • 3 pr. singleended via RCA connectors

Digital Inputs
  • 1 AES/EBU via XLR connector
  • 2 coaxial via RCA connectors
  • 2 optical via Toslink connectors

Main outputs
  • 1 balanced via XLR connectors
  • 1 pr. single]ended via RCA connectors

Headphone output
  • 1 via 3-conductor 6.35 mm (1/4 inch) connector

Control inputs
  • 1 RS-232 input via a 9-pin D-subminiature connector
  • 1 remote IR detector input via a 3-conductor 3.5 mm connector
  • 1 12 VDC trigger input via 2-conductor 3.5 mm connector

Control outputs
  • 2 individually programmable 12 VDC trigger outputs via 2-conductor 3.5mm connectors (30 mA maximum per output)

Circuitry Highlights
The Illusion II preamplifier is a dual monaural design with the left and right channels afforded their own power supply regulation and individual circuit boards. All signal gain is executed with surface mount technology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Featuring 700 kHz bandwidth in a zero feedback, balanced, Krell Current Mode design, the Illusion II shares the same design philosophy as its bigger brother, the flagship Illusion preamplifier. Negative feedback is not used anywhere in the preamp, nor is it necessary. Open-loop distortion is typically less than 0.003%. The volume control is realized with a balanced resistor ladder - bandwidth and transient response of the preamp circuitry are virtually unaffected by the volume setting. The headphone circuitry is identical to the main circuitry, offering private listening with the same performance as speaker playback.

Digital Module Highlights
The digital module supports up to 24 bit/192kHz LPCM. All digital signals are fed to an ESS Sabre DAC and then sent to Krell’s Current Mode, discrete, balanced analog circuitry.

Power Supply Highlights
Oversized for a preamplifier, the power supply features a 95 VA transformer and 40,000 µF of capacitance giving it the ability to respond quickly to musical demands. The large power supply improves noise rejection and renders the Illusion II impervious to all but the most severe AC voltage power fluctuations. A new eco-friendly standby mode reduces power consumption to 2W.


Speak to anyone who knows about high-end audio equipment and amplifiers and one of the brands that will spring to mind is Krell. For over three decades they have been at the top of the industry manufacturing amplifiers that push the boundaries as to what is possible. The KSA-100 was the first high power, high current, Class A biased stereo amplifier and was the product that launched Krell onto the market.

Since those early days Krell has continued to innovate and although their product range now goes beyond amplifiers they still remain at the core of the company’s offerings. Their product line up now includes award winning amplifiers, preamplifiers, SACD players, Blu-ray players, surround sound processors, digital-to-analogue converters and some seriously impressive loudspeakers.

If you’re looking for a high performance amplifier for your sound system or want to take your home cinema system to the next league, then a Krell amplifier is a must have addition. Get in touch today with Oxford Audio on 01865 790 879 to find out more about the Krell range of audio products.