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The KSA-i400 is a state-of-the-art 400 watt/channel stereo amplifier. It incorporates Krell’s most advanced circuit topologies and Krell’s proprietary technologies iBias, XD, and Sym-Max. This gives the KSA-i400 an organic, spacious, and detailed presentation along with the rock-solid bottom end and effortlessness that Krell is known for.Read More
Power The heart of any power amplifier is the power supply. The KSA-i400 has a massive power supply consisting of 5400VA of transformers and 188,000uF of filter capacitance. Delivering this power to the output circuit is a combination of gold-plated circuit boards and silver-plated sold copper buss bars with a very short physical path for extremely low impedance. This, along with the audio circuitry enables the KSA-i400 to double its power from 400 watts into 8 ohms to 800 watts into 4 ohms and even 1600 watts into 2 ohms. It can drive 1 ohm speakers and will deliver a peak current of up to 62 amps.
Analog Inputs 1 pr. balanced via XLR connectors 1 pr. single-ended via RCA connectors Outputs 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 Gain 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) Dimensions 17.25 in W x 9.4 in H x 24 in D Weight Unit only: 160 lb. As shipped:180 lb.