Power amplifiers stereo — Krell DUO 175 XD

The DUO 175 XD is a stereo power amplifier from Krell, sharing the Solo 375 XD's remarkably low output impedance and extraordinary damping factor within a two-channel format. The DUO 175 XD brings Krell's uncompromising current-delivery engineering to dedicated stereo power amplification.

Key specs that matter

Input sensitivity is 1,840mV, with input impedance at 200,000 ohms balanced or 100,000 ohms single-ended. Output impedance is a remarkably low under 0.015 ohms on both connections. Maximum current is a substantial 13 amps. Output power is 175W into 8 ohms, rising to 350W into 4 ohms. Gain is 26.2dBu. Frequency response spans a wide 0.5Hz to 100,000Hz within plus-or-minus 3dB. Signal-to-noise ratio exceeds 95dB. Maximum power consumption is a substantial 1,500W. Damping factor exceeds an extraordinary 530. At 434 x 194 x 536mm and 27.3kg, the DUO 175 XD shares the Solo 375 XD's chassis dimensions and mass in a two-channel configuration.

Sound and use context

Expect exceptionally clean, tightly controlled amplification reflecting the extraordinary over-530 damping factor combined with the substantial 13-amp maximum current, consistent with Krell's broader uncompromising current-delivery engineering philosophy.

Pairing

Krell's own preamplifier catalogue offers natural, brand-coherent pairings for a coherently voiced, entirely Krell-based system.

Alternatives

Krell's own Solo 375 XD offers a monoblock alternative within the same broader catalogue for buyers preferring separate mono chassis.