Krell Preamplifiers
Krell Illusion and Illusion II Preamplifiers
Krell Illusion preamplifier extends the Krell tradition of separating the power supply from the audio circuitry in our flagship preamplifiers. Sharing the new Class A iBias power amplifier aesthetic and featuring Krell CAST technology, the Illusion preamplifier is the ideal match for the new Solo 375 and Solo 575 power amplifiers.
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.
Illusion Preamplifier
$20,300.00
Krell Illusion Stereo preamplifier Technical Specifications
Inputs
2 pr. CAST via 4-pin bayonet connectors
2 pr. balanced via XLR connectors
3 pr. single-ended via RCA connectors
Tape input
1 pr. single-ended via RCA connector
Main outputs
2 pr. CAST via 4-pin bayonet connectors
1 pr. balanced via XLR connector
1 pr. single-ended via RCA connector
Subwoofer outputs
1 pr. balanced via XLR connector
1 pr. single-ended via RCA connector
Tape outputs
1 pr. single-ended via RCA connector,buffered
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 3.5 mm connector
1 preamplifier link via an RJ-45 connector
Control outputs
2 individually programmable 12 VDC trigger outputs via 3.5 mm connectors
1 preamplifier link via an RJ-45 connector
Power output
1 phone power output (±20 VDC) for KPE via a 9-pin D-subminiature connector
Frequency response
20 Hz to 20 kHz ± 0.02 dB
0.35 Hz to 720 KHz +0, -3 dB
Single-ended: 8 V RMS
Total harmonic distortion plus noise
Balanced Output: <0.003%, 20 Hz to 20 kHz, 4 V RMS or 4mARMS
Input impedance
CAST: 25 Ohms
Balanced: 40 k Ohms
Single-ended: 20 k Ohms
Output impedance
CAST: >1 MΩ
Balanced: 250Ω
Single-ended: 125Ω
Gain
12 dB (CAST or balanced output)
6 dB (single-ended output)
Volume control
Balanced, current-mode, 16-bit, discrete R-2R ladder
Input overload
Balanced, current-mode, 16-bit, discrete R-2R ladder
Output overload
CAST: 16 rnA RMS
Balanced: 16 V RMS
Single-ended: 8 V RMS
Signal-to-noise ratio
4 V RMS balanced or 4 mA RMS CAST output
Wideband, unweighted: >100 dB
“N’ weighted: >109 dB
Power consumption
Standby: 60 W
Power on: 65 W
Power on, with KPE: 75 W
Dimensions
Preamplifier only:
17.3 in.W x 3.8 in. H x 18.3 in. D
43.8 cm W x 9.7 cm H x 46.4 cm D
Power supply only:
17.3 in. W x 3.8 in. H x 17.7 in. D
43.8 cm W x 9.7 cm H x 44.8 cm D
Preamplifier and power supply:
17.3 in. W x 7.6 in. H x 18.3 in. D
43.8 cm W x 19.2 cm H x 46.4 cm D
Weight
Shipped: 61 lbs., 27.6 kg
Preamplifier only: 18 lbs., 8.1 kg
Power supply only: 28 lbs., 12.7 kg
Illusion II Preamplifier
$9,500.00
Krell Illusion II Stereo premplifier Technical Specifications
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
Total harmonic distortion 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
Preamplifier only:
17.3 in.W x 3.8 in. H x 18.3 in. D
43.8 cm W x 9.7 cm H x 46.4 cm D
Weight
Shipped: 38 lbs., 17.2 kg
Preamplifier only: 23 lbs., 10.4 kg
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