Krell Duo 125XD Power Amplifier

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)