Power amplifiers stereo — Luxman M-900u

The M-900u is an extraordinary stereo power amplifier from Luxman, sharing the M-10X's chassis footprint with staggering output power into extreme low-impedance loads. The M-900u represents Luxman's absolute current flagship statement in power amplifier engineering.

Key specs that matter

Input sensitivity is 1,240mV, matching the M-10X. Input impedance is 34,000 ohms balanced or 51,000 ohms single-ended. Output power is a staggering 1,200W into an extreme 1 ohm load, rising to an extraordinary 2,400W into 2 ohms - remarkable figures reflecting exceptional current delivery. Gain is 29dBu. Frequency response spans an exceptionally wide 1Hz to 130,000Hz within plus-or-minus 3dB, matching the M-10X. Signal-to-noise ratio is an exceptional 117dB, with total harmonic distortion plus noise at 0.008% at 100% global feedback. Maximum power consumption is 540W, with damping factor at an extraordinary 710. At 440 x 224 x 485mm and 48kg, the M-900u shares the M-10X's chassis footprint at nearly identical mass.

Sound and use context

Expect extraordinary dynamic authority and control reflecting the staggering output into extreme low-impedance loads combined with the extraordinary 710 damping factor, representing Luxman's absolute current flagship power-amplifier engineering ambition.

Pairing

The staggering current delivery into 1-2 ohm loads handles the most demanding, unusually low-impedance loudspeaker designs with confidence.

Alternatives

Luxman's own M-10X offers a somewhat more conventional alternative specified for standard 8/4-ohm loads within the same broader catalogue.