Musical Fidelity - M8s-700m Monobloc Power Amplifiers Black - Pair (Open Box)

Open box item — one matched pair available.

A pair of fully balanced monobloc power amplifiers — 700 watts per channel into 8 ohms and around 1,300 watts into 4 ohms from each chassis, sold here as a complete stereo pair, open box.

The M8s-700m is Musical Fidelity's more affordable, conventionally sized successor to the limited-edition Titan of 2008. Each chassis is a single fully balanced monobloc delivering 700 watts RMS into 8 ohms and just on 1,300 watts into 4 ohms, and Musical Fidelity's own measurements place it within about 1.25dB of the 1kW Titan in action. Bought as a pair you get one amplifier per channel — the configuration the design is built around.

Distortion is specified typically at 0.001% at 1kHz and below 0.005% at 20kHz, rising to 0.02% at 50kHz and around 0.06% at 100kHz — frequencies no recording contains, quoted to show the amplifier's overall behaviour rather than anything you will hear. Signal-to-noise is better than 120dB A-weighted and frequency response runs +0/−1dB from 10Hz to 80kHz.

Each monobloc takes an RCA line-level or a single XLR balanced input, with a 3.5mm trigger input for system automation. Twin sets of speaker terminals make bi-wiring straightforward, and the outputs can be daisy-chained to bi-amp suitable speakers. There is no volume control, no phono stage and no headphone socket — this is a power amplifier and nothing else. It is the natural partner to Musical Fidelity's M8sPRE preamplifier.

Features

• Sold as a complete stereo pair — two fully balanced monobloc power amplifiers, one per channel
• 700 watts per channel into 8 ohms, approximately 1,300 watts into 4 ohms, from each monobloc
• Distortion typically 0.001% at 1kHz and below 0.005% at 20kHz
• Signal-to-noise better than 120dB A-weighted
• RCA line-level and XLR balanced inputs, plus a 3.5mm trigger input
• Twin sets of speaker terminals for easy bi-wiring; outputs can be daisy-chained to bi-amp suitable speakers
• Huge peak current delivery — will drive just about any loudspeaker
• Partners the M8sPRE preamplifier

Specifications (per monobloc)

• Type: Fully balanced monobloc power amplifier
• Condition: Open box
• Quantity: Sold as a pair (two chassis)
• Power Output: 700 watts per channel into 8 ohms (28 dBW); approximately 1,300 watts into 4 ohms
• THD + Noise: <0.005% typical
• THD, Additional Published Figures: Typically 0.001% at 1kHz; below 0.005% at 20kHz; 0.02% at 50kHz; around 0.06% at 100kHz
• Signal-to-Noise Ratio: >120dB A-weighted
• Frequency Response: +0, −1dB, 10Hz – 80kHz
• Inputs: 2 x RCA phono line level; 1 x XLR balanced; trigger in on 3.5mm mono jack, ±4.5V to ±15V DC
• Outputs: Twin sets of speaker binding posts (bi-wiring); outputs can be daisy-chained to bi-amp suitable speakers
• Volume Control: None — this is a power amplifier
• Headphone Output: None
• Dimensions (W x H x D): 440 x 160 x 460 mm (each chassis)
• Weight: 30 kg (66 lb) unpacked, 35.5 kg packed — per chassis
• Stereo Sibling: M8s-500s — a single-chassis fully balanced stereo amplifier, 500 watts per channel into 8 ohms
• Warranty: Two years, administered by the local national distributor — Harmonia Distribution has handled Musical Fidelity in the United States since 15 November 2025. Cover is for the original owner only, is non-transferable, and requires the original sales invoice as proof of purchase date.
• Country of Manufacture: Not published. Musical Fidelity was founded in London in 1982 and has been owned since 2018 by Audio Tuning Vertriebs GmbH of Austria, the parent of Pro-Ject. The company states its products are designed and voiced in the UK and continental Europe, which is a design statement rather than a manufacturing one.
• Not Published: Rated power into 2 ohms; input sensitivity; voltage gain; output impedance; damping factor; slew rate; power consumption; fuse ratings. Musical Fidelity's specification sheet for this model lists performance, inputs and general dimensions only.