Power amplifiers mono — Soulnote M-3X

The M-3X is a monoblock power amplifier from Soulnote, a Japanese manufacturer known for distinctive, purist electronics engineering philosophy, built with an exceptionally wide bandwidth. The M-3X brings Soulnote's considered engineering to dedicated single-channel power amplification.

Key specs that matter

Output power is 160W into 4 ohms. Gain is 22dBu. Frequency response spans an exceptionally wide 2Hz to 200,000Hz within plus-or-minus 3dB. Total harmonic distortion plus noise is 0.1% measured without global feedback - a specification approach favoured by designers pursuing a particular sonic character over headline distortion figures. At 340 x 257 x 512mm and 31kg, the M-3X reflects serious internal transformer and chassis engineering for a monoblock design.

Sound and use context

Expect a distinctive character reflecting the zero-global-feedback design philosophy, which designers typically pursue for its particular harmonic and dynamic qualities rather than the lowest possible distortion figures, consistent with Soulnote's broader purist Japanese engineering approach.

Pairing

As a monoblock, the M-3X requires two units per stereo pair, and the 160W-into-4-ohms output should be matched to loudspeaker sensitivity and impedance for adequate headroom.

Alternatives

Other manufacturers' zero-feedback monoblock power amplifiers offer alternatives for buyers wanting to compare this distinctive design philosophy.