Frequency response 20 Hz to 20 kHz +0, -0.18 dB <0.5 Hz to 125 kHz +0, -3 dB Signal-to-noise ratio >108 dB, wideband, unweighted, referred to full power output >118 dB, "A"-weighted Gain 25.4 dB Total harmonic distortion <0.02% at 1 kHz, at 400 W, 8 O <0.15% at 20 kHz, at 400 W, 8 O Input impedance Single-ended: 100 kO Balanced: 200 kO CAST: 70 O Input sensitivity Single-ended or balanced: 3.04 V RMS CAST: 3.04 mA RMS Output power 400 W RMS at 8 O 800 W RMS at 4 O Output voltage 160 V peak-to-peak 57 V RMS Output current 37 A peak Slew rate 100 V/μs Output impedance <0.055 O at 20 Hz <0.064 O, 20 Hz to 20 kHz Damping factor >145 at 20 Hz, referred to 8 O >125, 20 Hz to 20 kHz, referred to 8 O Power consumption Stand-by: 2 W High Current Stand-by: 150 W Idle: 210 W Maximum: 2500 W Heat output Stand-by: 7 BTU/hr. High Current Standby: 510 BTU/hr. Idle: 720 BTU/hr. Maximum: 3800 BTU/hr. Inputs 1 single-ended via RCA connector 1 balanced via XLR connector 1 CAST via 4-pin bayonet connector Outputs 1 pair Krell binding posts Dimensions 14.50 in. W x 9.75 in. H x 20.65 in. D 368 mm W x 248 mm H x 525 mm D Weight 120 lbs., 54.3 kg (shipping) 102 lbs., 46.2 kg (unit only)