PS Audio PMG Signature
Series M800 And M400 Monoblock Amplifiers
PS Audio adds PMG Signature M800 and M400 monoblocks
PS Audio has added two monoblock power amplifiers to its PMG Signature range. The flagship M800 is rated at 400W into 8Ω, while the M400 is rated at 200W into 8Ω. US prices are $29,998 and $17,998 per pair, respectively.
Georg S. Kuklick
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PS Audio has expanded its PMG Signature amplifier range with the PMG Signature M800 and PMG Signature M400 monoblock power amplifiers. In the United States, the M800 costs $29,998 per pair, and the M400 costs $17,998 per pair. Both models use an active power-supply architecture.
The PMG Signature M800 power amplifier is rated at 400W into an 8Ω load and 800W into a 4Ω load. The PMG Signature M400 is rated at 200W into an 8Ω load and 400W into a 4Ω load. Class A bias is specified at 50W for the M800 and 30W for the M400. Each monoblock has a specified bandwidth greater than 500kHz and a slew rate greater than 200V/µs.
The PMG Signature M800 accepts balanced XLR inputs. It also accepts single-ended RCA inputs. The PMG Signature M400 accepts balanced XLR inputs. It also accepts single-ended RCA inputs.
The PMG Signature M800 measures 27.5 inches in length, 17.5 inches in width and 8.75 inches in height. The M800 power amplifier weighs 119.2lb. The PMG Signature M400 measures 16 inches in length, 17.5 inches in width and 8 inches in height. The M400 power amplifier weighs 68lb.
The PMG Signature M800 occupies the flagship monoblock position in PS Audio's PMG amplifier range. PS Audio's PMG S200 Stereo and PMG S400 Stereo power amplifiers were already part of the PMG Signature amplifier range. The PMG Signature M800 and PMG Signature M400 monoblocks joined those stereo models on 26 August 2026.
Key specifications
Product type | M800 and M400 monoblock power amplifiers, sold as pairs |
|---|---|
M800 power output | 400W into 8Ω; 800W into 4Ω |
M400 power output | 200W into 8Ω; 400W into 4Ω |
M800 Class A bias | 50W |
M400 Class A bias | 30W |
Bandwidth | Both models: greater than 500kHz |
Slew rate | Both models: greater than 200V/µs |
Power-supply architecture | Active power-supply architecture |
Input types | Balanced XLR and single-ended RCA |
Additional connections | Two speaker-output sets; subwoofer output; 12V trigger input |
M800 dimensions | 27.5 × 17.5 × 8.75in (L × W × H) |
M800 weight | 119.2lb |
Rung below: PS Audio PMG S400 Stereo — $9,999.00
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