KSA-i400 Stereo Amplifier Technical Specifications

400 Watt Amplifier feature Krell Ibias, XD, and Sym-Max technologies

KSA-i400 Stereo Power Amplifier

Analog Inputs
1 pr. balanced via XLR connectors
1 pr. single-ended via RCA connectors

2 pr. speaker outputs via gold-plated binding posts

Control inputs
1 Ethernet via RJ45
1 12 VDC trigger input via 2-conductor 3.5 mm connector

Input impedance
Balanced: 34 kΩ
Single-ended: 17 kΩ

Frequency response
20 Hz to 20 kHz +0.1, -0.07 dB
-3dB bandwidth 200kHz (measured at 50W into 8Ω)

Signal-to-noise ratio
>102 dBr, wideband, unweighted, referred to full power output
>117 dBr, “A”-weighted

26.4 dB

Input Sensitivity
2.8 V RMS Balanced
2.8 V RMS Single-ended

Total harmonic distortion
<0.015%, 1 kHz, 400W, 8Ω load
<0.12%, 20 kHz, 400W, 8Ω load

Output power
400W RMS per channel at 8Ω
800W RMS per channel at 4Ω

Output voltage
164 V peak to peak
58 V RMS

Output current
62 A peak

Slew rate
70 V/µs

Output impedance
<0.01 Ω, 20 Hz to 20 kHz

Damping factor
>800, 20 Hz to 20 kHz, referred to 8 Ω

Power consumption
Standby: 1 W
Idle: 260 W
Maximum: 4750 W

Heat output
Idle: 890 BTU/hr
Maximum:10,773 BTU/hr (4Ω load, both channels at full power)

17.25 in W x 9.4 in H x 24 in D
438 mm W x 239 mm H x 610 mm D

Unit only: 160 lb. [73 kg]
As shipped:180 lb. [82 kg]

Specifications subject to change without notice.