Duo 300 XD Stereo Power Amplifier

Duo 300 XD Stereo Power Amplifier


Current model Krell Duo 300 XD Stereo Power Amplifier in excellent secondhand condition. Presently these are listing for 22k new, so this is one is quite the bargain.

Local pickup or $11 flat rate shipping within Australia

With 300 watts of power per channel, this power amplifier can drive even the most demanding speakers with ease. And with a signal-to-noise ratio of over 100dB, expect playback in absolute clarity. The 300 XD features Krell’s iBias technology, which eliminates crossover distortion and a fully balanced signal path and a proprietary input buffer.  Build thoughts – this thing is definitely built to last. A tank like chassis and high-quality components – expect years of reliable service. Need a sturdy place to put it, given it weighs in at 30+kgs!


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 or 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

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

Outputs  – 2 pairs binding posts

Dimensions – 434 mm W x 194 mm H x 536mm D

Weight  – 31.8 kg

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