Krell is one of the most dependable brand names when it comes to high-end audio systems. For years the brand has been recognized by audiophiles throughout the world as equipment that delivers clear and consistent quality in music.
What are the specs for the Krell Illusion II?
- 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 pr. 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)
- Input Impedance:
- Balanced: 40kΩ Single-ended 20kΩ
- Output Impedance:
- Balanced: 310 Ω Single-ended: 155 Ω Headphone: <3.0Ω
- Frequency Response:
- 20 Hz to 20 kHz +0, -0.02 dB 0.25 Hz to 1.2 MHz +0, -3 dB
- THD Plus Noise:
- Balanced Output: <0.003%, 20 Hz to 20 kHz, at 4.0 V RMS Headphone: <0.09%, 20 Hz to 20 kHz, 2.0 V RMS, 32 Ω load
- Gain:
- Balanced: 12.0 dB 6 dB (single-ended output) Single-ended: 6.0 dB Headphone: 5.1 dB with 32 Ω load
- Volume Control:
- Current mode, 12-bit, discrete R-2R ladder
- Input Overload:
- > 7.0 V RMS balanced or single-ended
- Output Overload:
- Balanced: >16 V RMS Single-ended: >8.0 V RMS Headphone: >3.0 V RMS, 32 Ω load
- Signal to Noise Ratio:
- 100 dB wideband, unweighted 107 dB ”A”-weighted, both referred to 4.0 V RMS balanced
- Power Consumption:
- Standby: <2 Watts Power on: 40 Watts
- Dimensions:
- 17.3 in.W x 3.8 in. H x 18.3 in. D
- Weight:
- 23lbs
What else to know about the Krell Illusion II?
The Illusion II is the perfect centerpiece 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. **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.Brief History of McIntosh
Long mapped-to Binghamton New York – the current headquarters and manufacturing center for Krell Labs – not many people know the brand was originally launched outside of the Nation’s Capital in Silver Spring Maryland, in 1949. In 1956, the brand built their original facility in New York, according to the official brand website.
StereoBuyers has purchased tens of thousands worth Krell brand equipment since 2014, with individual buys ranging from $100 to well over $50,000. If you are moving, ready to upgrade, or have Krell equipment you do not or will not be using, why not contact us today to find out if it is worth good money?
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The following images show actual Krell equipment purchased by StereoBuyers.
