PS Audio PMG Signature M800 Mono Power Amplifiers

PS Audio PMG Signature M800 Mono Power Amplifiers

The PS Audio PMG Signature M800 Mono Power Amplifiers represent the flagship of the PMG Signature Series and the culmination of five decades of PS Audio amplifier design. Designed by Darren Myers, engineered by Bob Stadtherr and hand-built in Boulder, Colorado, the M800 combines immense power, exceptional speed, ultra-low distortion and 50 watts of pure Class A operation to deliver a remarkably transparent and effortless listening experience.

The PS Audio PMG Signature M800 delivers 400 watts into 8 ohms and 800 watts into 4 ohms, providing the current, control and headroom required by virtually any loudspeaker. Each M800 is a dedicated monoblock amplifier, with a stereo pair providing outstanding drive for demanding reference loudspeakers, including low-impedance designs, electrostatics and high-end speakers requiring substantial power reserves.

The PS Audio PMG Signature M800 Mono Power Amplifiers are available for demonstration in our Hull store by request.

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Rather than simply pursuing headline power, PS Audio has focused on the qualities that make high-performance amplification genuinely compelling: speed, linearity, current delivery, low noise and control. The result is a flagship power amplifier capable of combining enormous reserves with the delicacy, openness and transparency expected from a high-end Class A design.

800 Watts of Effortless Amplifier Power

Each PS Audio M800 is a dedicated monoblock power amplifier, with one chassis driving a single speaker channel. Rated at 400 watts into 8 ohms and 800 watts into 4 ohms, the M800 delivers the authority required for dynamic, large-scale music while maintaining composure when demanding loudspeaker loads and complex musical transients place greater demands on the amplifier.

50 Watts of Pure Class A Bias

A defining feature of the PS Audio PMG Signature M800 is its 50 watts of pure Class A operation. Class A amplification is renowned for its exceptional linearity because the output devices remain continuously active, avoiding the crossover discontinuities associated with conventional push-pull operation.

The M800's substantial Class A bias helps preserve the natural texture, tonal colour and microdynamic detail contained within the recording. From the body of a cello and texture of a vocal performance to the delicate decay of cymbals, the M800 is designed to reproduce music with clarity and continuity rather than imposing an obvious electronic character.

Advanced Active Power Supply

At the heart of the PS Audio PMG M800 is a state-of-the-art active power supply, rather than a conventional transformer-based passive supply. The power supply is fundamental to any high-performance power amplifier, determining how quickly and cleanly stored energy can be delivered when the music demands it.

PS Audio's active supply architecture is designed to provide extremely fast transient response, a low noise floor, stable voltage and the ability to deliver substantial current without the sense of compression or sag that can accompany less capable power supplies. This gives the M800 substantial reserves for demanding passages, rapid response to musical transients and the control necessary to maintain a firm grip on the loudspeaker.

Exceptional Speed and Low Distortion

The PS Audio M800 Mono Power Amplifier has been engineered for exceptional speed, with a slew rate exceeding 200 volts per microsecond. This enables the amplifier to respond extremely rapidly to changes in the musical waveform, helping preserve the leading edges and timing information that contribute to a sense of realism and immediacy.

PS Audio also specifies remarkably consistent low distortion across the audible frequency range. Rather than relying on heavy corrective feedback to achieve impressive measurements, the M800's low-feedback current-based topology is designed to achieve high linearity at the circuit level. The result is an amplifier intended to sound fast, open and natural while retaining the authority expected from an 800-watt high-end monoblock.

Low-Feedback Current-Based Design

The PMG Signature M800 follows a deliberately low-feedback design philosophy developed by PS Audio's Darren Myers. Instead of relying heavily on global negative feedback to correct amplifier errors, the M800 is engineered to achieve exceptional linearity through its underlying circuit topology.

This approach is intended to preserve the immediacy of musical transients and minimise the sense that the amplifier is imposing its own character on the recording. The result is an exceptionally transparent presentation where the amplifier can effectively disappear from the listening experience.

Designed by Darren Myers and Hand-Built in Boulder

The PS Audio PMG Signature M800 is the result of decades of amplifier development at PS Audio. Darren Myers is responsible for the amplifier's design, with Bob Stadtherr overseeing its engineering and production development. Every M800 is assembled and tested by hand in Boulder, Colorado, ensuring that the production amplifier remains faithful to the original design objectives.

Designed for Demanding Loudspeakers

As a high-power monoblock, the PS Audio PMG Signature M800 is ideally suited to demanding high-end loudspeaker systems. Its 800-watt output into 4 ohms and substantial current capability make it an appropriate partner for speakers that require significant amplifier control and power. A pair of M800 monoblocks can provide a combination of scale, dynamics, control and finesse that is difficult to achieve with conventional integrated amplification or lower-powered stereo power amplifiers.

Whether reproducing orchestral crescendos, demanding electronic music, rock dynamics or the subtle microdetail of a solo vocal recording, the M800 is designed to remain composed, powerful and transparent.

PS Audio PMG Signature M800 – Reference-Class Amplification

The PS Audio PMG Signature M800 Mono Power Amplifiers bring together PS Audio's latest thinking in power supply technology, Class A operation, low-feedback amplification and high-current power delivery. With 800 watts into 4 ohms, 50 watts of pure Class A bias, a slew rate exceeding 200 V/µs, an advanced active power supply and a low-feedback current-based topology, the M800 is engineered to deliver both overwhelming authority and exceptional musical subtlety.

For listeners seeking a flagship PS Audio power amplifier capable of driving demanding loudspeakers without sacrificing transparency, speed or refinement, the PMG Signature M800 represents the pinnacle of PS Audio's mono power amplifier design.

PS Audio PMG Signature M800 Mono Power Amplifiers Specification:

• Power Output: 400W into 8Ω, 800W into 4Ω, 1200W into 2Ω (1kHz, <1% THD)
• Class A Power Output: 60W into 8Ω
• THD: <0.002% typical (20Hz–20kHz, 1W/8Ω)
• Frequency Response: <10Hz – 80kHz (±0.25dB)
• Bandwidth: >500kHz
• Damping Factor: >300 at 8Ω (20Hz–1kHz)
• Audio Inputs: RCA (Single-ended): 1 pair | XLR (Balanced): 1 pair
• Speaker Outputs: Silver Plated Binding Posts: 2 pair
• Input Impedance: 100kΩ Single-ended | 200kΩ Balanced
• Gain: 26.2 dB
• Sensitivity: 2.8V
• Input Power: Auto Voltage: 120VAC or 230VAC, 50 or 60 Hz
• Power Consumption: Standby (Ready): <2W | Idle: 360W | 25W/4Ω: 520W
• Trigger: Input: 3.5mm, 5–15VDC | Output: 3.5mm, 12VDC
• Unit Weight: 95.7 lbs / 43.4 kg
• Unit Dimensions: 26.75 in L × 17.5 in W × 8 in H (679.5 × 444.5 × 203.2 mm)
  With feet & binding posts: 27.5 in L × 17.5 in W × 8.75 in H
• Shipping Weight: 119.2 lbs / 54.1 kg (per unit)
• Shipping Dimensions: 34.4 × 23.1 × 14.9 in / 873.8 × 586.7 × 378.5 mm (2 units)
• Fuses: No user serviceable fuses