Krell Chorus 4200 XD
Krell's XD (Xtended Dynamics, Dimensionality & Detail) upgrade for the iBias amplifiers takes an already great sounding amplifier and raises its performance to the next level. XD is a classic example of Krell's continuous R&D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance below traditional norms. When applying this technique to our existing line of amplifiers, the improvement was so substantial, it deserved its own, unique designation"XD.
PRODUCT DETAILS
Technical Specifications
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-
<0.04% at 1 kHz, at 200 W, 8 Ω
<0.15% at 20 kHz, at 200 W, 8 Ω
Input impedance-
Single-ended: 100 kΩ
Balanced: 200 kΩ
Input sensitivity- Single-ended or balanced: 1.96 V RMS
Output power-
200 W RMS at 8 Ω
360 W RMS at 4 Ω
Output voltage-
113 V peak-to-peak
40 V RMS
Output current- 13.4 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 8W
Physical Specifications
Power consumption-
Standby: 1 W
Idle: 145 W
Maximum: 1680 W
Heat output-
Standby: 3.4 BTU/hr.
Idle: 530 BTU/hr.
Maximum: 6276 BTU/hr.
Inputs-
4 single-ended via RCA connector
4 balanced via XLR connector
Outputs- 4 pairs binding posts
Dimensions
17.1 in. W x 7.65 in. H x 21.10 in. D
434 mm W x 194 mm H x 536 mm D
Weight-
88 lbs., 40 kg (shipping)
78 lbs., 35 kg (unit only)
