Power amplifiers mono — PS Audio M700 Amplifier

The M700 Amplifier is a mono power amplifier from PS Audio, built with an exceptionally high damping factor. This model uses PS Audio's distinctive class D amplifier technology, offering substantial output from a remarkably compact and light chassis compared with a conventional linear amplifier design.

Key specs that matter

Input impedance is 100,000 ohms balanced and 50,000 ohms single-ended. Rated output is 350 W into 8 ohms - the quoted 4 ohm figure appears to contain a data entry error and should be confirmed directly with PS Audio or a dealer rather than taken at face value. Gain is 30.5 dBu. Rated bandwidth is 10 Hz to 50 000 Hz. Distortion is under 0.05% at full feedback. Damping factor exceeds 1100, an exceptionally high figure. At 432 x 76 x 305 mm and 5.9 kg it is remarkably light for its substantial output, consistent with PS Audio's efficient class D output stage.

Sound and use context

Expect an extremely controlled, high-damping-factor presentation from a compact, lightweight chassis - PS Audio's class D technology delivers substantial output and exceptional control without the bulk a conventional linear amplifier of similar power would typically require.

Pairing

The 100,000 ohm balanced input impedance works with any modern preamplifier without gain-matching concerns, so integration should present no particular challenge regardless of the preamplifier chosen.

Alternatives

PS Audio's broader amplifier range, including higher-output models, sits above this model for a room needing even more power, worth comparing directly if this model's already substantial 350 W output proves insufficient for a specific loudspeaker and room combination. PS Audio class D technology remains a distinctive part of the brand engineering approach, and buyers unfamiliar with this topology should seek out independent reviews addressing its specific sonic character compared with a conventional linear amplifier design. A dealer conversation clarifying the exact 4 ohm output figure is worthwhile given the apparent data inconsistency in the published specification, and adequate ventilation space around the chassis also helps this amplifier run reliably. Overall this remains a capable, efficient choice reflecting PS Audio characteristic class D engineering. A dealer visit remains the simplest way to compare current pricing across PS Audio amplifier catalogue.