Krell Power Amplifiers

Krell’s New XD Technology
Krell Power Amplifers with Krell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended 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. So we applied this technique to our existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”

Two Channel and Mono amplifiers

Solo 575 XD

$15,400.00

Solo 375 XD

$12,000.00

Duo 300 XD

$13,300.00

Duo 175 XD

$10,200.00

Duo 125 XD

$7500.00

Krell Multi Channel and Mono amplifiers

Krell trio 300
Trio 300 XD

$15,800.00

Krell Chorus 4200
Chorus 4200 XD

$10,200.00

Krell Chorus 5200
Chorus 5200 XD

$11,700.00

Chorus 7200 XD

$14,400.00

Krell_Duo_XD_Stereo_Amplifier_Rear-1

DUO 125 XD

$7,500.00

2 Channel Power Amplifier
125 Watt Amplifier Featuring Krell iBias Technology

Krell Duo 125 XD Stereo Amplifier 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
>112 dB, “A”-weighted

Gain
25.8 dB

Total harmonic distortion
<0.03% at 1 kHz, at 125 W, 8 Ω
<0.17% at 20 kHz, at 125 W, 8 Ω

Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 1.63 V RMS

Output power
125 W RMS at 8 Ω
250 W RMS at 4 Ω

Output voltage
89.4 V peak-to-peak
31.6 V RMS

Output current
18 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 8 Ω

Power consumption
Standby: 1 W
Idle: 58 W
Maximum: 1350 W

Heat output
Standby: 3.42 BTU/hr.
Idle: 198 BTU/hr.
Maximum: 4617 BTU/hr.

Inputs
2 single-ended via RCA connector
2 balanced via XLR connector

Outputs
2 pairs binding posts

Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D

Weight
60 lbs., 27.3 kg (shipping)
50 lbs., 22.7 kg (unit only)

Krell_Duo_XD_Stereo_Amplifier_Rear-1

DUO 175 XD

$10,200.00

2 Channel Power Amplifier
175 Watt Amplifier Featuring Krell iBias Technology

Krell Duo 175 XD Stereo Amplifier 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
<0.03% at 1 kHz, at 175 W, 8 Ω
<0.13% at 20 kHz, at 175 W, 8 Ω

Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 1.84 V RMS

Output power
175 W RMS at 8 Ω
350 W RMS at 4 Ω

Output voltage
106 V peak-to-peak
37 V RMS

Output current
13 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 8 Ω

Power consumption
Standby: 1 W
Idle: 73 W
Maximum: 1500 W

Heat output
Standby: 3.42 BTU/hr.
Idle: 250 BTU/hr.
Maximum: 5137 BTU/hr.

Inputs
2 single-ended via RCA connector
2 balanced via XLR connector

Outputs
2 pairs binding posts

Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D

Weight
70 lbs., 31.8 kg (shipping)
60 lbs., 27.3 kg (unit only)

Krell_Duo_XD_Stereo_Amplifier_Rear-1

DUO 300 XD

$13,300.00

2 Channel Power Amplifier
300 Watt Amplifier Featuring Krell iBias Technology

Krell Duo 300 XD Stereo Amplifier Technical Specifications

Frequency response
20 Hz to 20 kHz +0, -0.13 dB
0.5 Hz to 100 kHz +0, -3 dB

Signal-to-noise ratio
>98 dB, wideband, unweighted, referred to full power output
>116 dB, “A”-weighted

Gain
26.2 dB

Total harmonic distortion
<0.045% at 1 kHz, at 400 W, 8 Ω
<0.17% at 20 kHz, at 400 W, 8 Ω

Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 2.4 V RMS

Output power
300 W RMS at 8 Ω
540 W RMS at 4 Ω

Output voltage
138 V peak-to-peak
49 V RMS

Output current
16 A peak

 Slew rate
40 V/μs

Output impedance
<0.007Ω, 20 Hz to 20 kHz

Damping factor
>1140, 20 Hz to 20 kHz, referred to 8 Ω

Power consumption
Standby: 4 W
Idle: 180 W
Maximum: 1600 W

Heat output
Standby: 13.7 BTU/hr.
Idle: 615 BTU/hr.
Maximum: 5677 BTU/hr.

Inputs
2 single-ended via RCA connector
2 balanced via XLR connector

Outputs
2 pairs binding posts

Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D

Weight
80 lbs., 3.64 kg (shipping)
70 lbs., 31.8 kg (unit only)
Krell_Solo_375_XD_Mono_Amplifier_Rear-1

SOLO 375 XD

$12,000.00

Mono Power Amplifier
375 Watt Amplifier Featuring Krell iBias Technology

Krell Solo 375 XD Stereo Amplifier Technical Specifications

Frequency response
20 Hz to 20 kHz +0, –0.15 dB
<0.5 Hz to 100 kHz +0, –3 dB

Signal-to-noise ratio
>103 dB, wideband, unweighted, referred to full power output
>114 dB, “A”-weighted

Gain
27 dB

Total harmonic distortion
<0.03% at 1 kHz, at 375 W, 8 Ω
<0.19% at 20 kHz, at 375 W, 8 Ω

Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 2.45 V RMS

Output power
375 W RMS at 8 Ω
600 W RMS at 4 Ω

Output voltage
154 V peak-to-peak
55 V RMS

Output current
17 A peak

 Slew rate
40 V/μs

Output impedance
<0.018Ω, 20 Hz to 20 kHz

Damping factor
>440, 20 Hz to 20 kHz, referred to 8

Power consumption
Standby: 1 W
Idle: 66 W
Maximum: 1150 W

Heat output
Standby: 3.42 BTU/hr.
Idle: 225 BTU/hr.
Maximum: 3933 BTU/hr.

Inputs
1 single-ended via RCA connector
1 balanced via XLR connector
1 CAST

Outputs
1 pairs binding posts

Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D

Weight
70 lbs., 31.8 kg (shipping)
60 lbs., 27.3 kg (unit only)
Krell_Solo_575_Mono_Amplifier_575_Rear-1

SOLO 575 XD

$15,400.00

Mono Power Amplifier
575 Watt Amplifier Featuring Krell iBias Technology

Krell Solo 575 XD Stereo Amplifier Technical Specifications

Frequency response
20 Hz to 20 kHz +0, –0.15 dB
<0.5 Hz to 100 kHz +0, –3 dB

Signal-to-noise ratio
>108 dB, wideband, unweighted, referred to full power output
>115 dB, “A”-weighted

Gain
27 dB

Total harmonic distortion
<0.03% at 1 kHz, at 575 W, 8 Ω
<0.19% at 20 kHz, at 575 W, 8 Ω

Input Impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 3.03 V RMS

Output power
575 W RMS at 8 Ω
900 W RMS at 4 Ω

Output voltage
192 V peak-to-peak
68 V RMS

Output current
22 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 8

Power consumption
Standby: 1 W
Idle: 131 W
Maximum: 2660 W

Heat output
Standby: 3.42 BTU/hr.
Idle: 448 BTU/hr.
Maximum: 9097 BTU/hr.

Inputs
1 single-ended via RCA connector
1 balanced via XLR connector
1 CAST

Outputs
1 pairs binding posts

Dimensions
17.1 in. W x 7.65 in. H x 21.10in. D
434 mm W x 194 mm H x 536mm D

Weight
80 lbs., 36.4 kg (shipping)
70 lbs., 31.8 kg (unit only)
Krell trio 300
Krell_Trio_300_XD_Multi-Channel_Amplifier_Rear-1 (1)

TRIO 300

$15,800.00

3 Channel Power Amplifier
300 Watt Amplifier Featuring Krell iBias Technology

Trio 300 Multi-Channel Amplifier Technical Specifications

Frequency response
20 Hz to 20 kHz +0, –0.13 dB
<0.5 Hz to 100 kHz +0, –3 dB

Signal-to-noise ratio
>98 dB, wideband, unweighted, referred to full power output
>116 dB, “A”-weighted

Gain

26.2 dB

Total harmonic distortion
<0.045% at 1 kHz, at 300 W, 8 Ω
<0.17% at 20 kHz, at 300 W, 8 Ω

Input impedance
Single-ended: 100 kΩ
Balanced: 200 kΩ

Input sensitivity
Single-ended or balanced: 2.4 V RMS

Output power 300 W RMS at 8 Ω
540 W RMS at 4 Ω

Output voltage
138 V peak-to-peak
49 V RMS

Output current
16 A peak

Slew rate
40 V/μs

 Output impedance
<0.007Ω, 20 Hz to 20 kHz

Damping factor
>1140, 20 Hz to 20 kHz, referred to 8W

Power consumption
Standby: 4 W
Idle: 200 W
Maximum: 2160 W

Heat output< Standby: 13.7 BTU/hr.
Idle: 800 BTU/hr.
Maximum: 7387 BTU/hr.

Inputs
3 single-ended via RCA connector
3 balanced via XLR connector

Outputs
3 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
100lbs., 45.4 kg (shipping)
85 lbs., 38.6 kg (unit only)
Krell trio 300

Chorus 4200

$10,200.00

3 Channel Power Amplifier

300 Watt Amplifier Featuring Krell iBias Technology

Krell Chorus 4200 Multi-Channel Amplifier 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

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)
Krell Chorus_5200_Multi_Channel_Amplifier
Krell_Chorus_5200_Multichannel_Amplifier

Chorus 5200

$11,700.00

5 Channel Power Amplifier

200 Watt Amplifier Featuring Krell iBias Technology

Krell Chorus 5200 Multi-Channel Amplifier 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

Power consumption
Standby: 1 W
Idle: 182 W
Maximum: 2100 W

Heat output< Standby: 3.4 BTU/hr.
Idle: 623 BTU/hr.
Maximum: 7182 BTU/hr.

Inputs
5 single-ended via RCA connector
5 balanced via XLR connector

Outputs
5 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
95 lbs., 43.2 kg (shipping)
85 lbs., 38.6 kg (unit only)
Krell_Chorus_7200_multi_channel_amplifier_rear

Chorus 7200

$14,400.00

5 Channel Power Amplifier

200 Watt Amplifier Featuring Krell iBias Technology

Krell Chorus 5200 Multi-Channel Amplifier 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 8 W

Power consumption
Standby: 1 W
Idle: 255 W
Maximum: 2800 W

Heat output< Standby: 3.4 BTU/hr.
Idle: 873 BTU/hr.
Maximum: 9590 BTU/hr.Inputs
7 single-ended via RCA connector
7 balanced via XLR connector

Outputs
7 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
110 lbs., 50 kg (shipping)
100 lbs., 45.4 kg (unit only)

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