The M3si integrated amplifier produces high quality sound, has an extensive range of useful inputs and offers high reliability, compact size and a fair price. With its strong 85 watts per channel, the M3si will drive a huge variety of appropriate loudspeakers. It has inputs for phono (MM), 4 line inputs and USB ‘B’ up to 24bit 96 kHz.

The M3si’s sound is effortless, clear and sweet. It projects wide and deep images and has plenty of power to deliver excellent dynamic range.


The M3si is unconditionally stable and will drive any appropriate loudspeaker with ease.

Although it is Musical Fidelity’s lowest price amplifier, it embodies our hallmark values of uncoloured, stress-free sound, outstanding technical performance and great value for money.


M3si In Brief
Excellent technical performance
Preamp output
Unconditional stability, will drive any loudspeaker
Wide range of useful inputs
including asynchronous USB and MM phono
Excellent build quality and convenient size

Musical Fidelity M3SI

  • M3si - Specifications
    Power output: 85 Watts per channel into 8 Ohms
    THD(+ noise): <0.014 % typical, 20Hz to 20 kHz
    Signal to Noise Ratio: >98dB ‘A’-weighted
    Frequency Response: +0, –0.1dB, 10Hz to 20 kHz

    4x Line Level RCA / Phono
    1x USB type ‘B’ connector - Asynchronous data stream at up to 24-bit/96kHz
    1x MM Phono input

    Phono Input
    Sensitivity (nominal): 3mV (suitable for cartridges giving 1.5mV or more including high output MC types)
    Signal / noise ratio: >70dB ‘A’-weighted
    Input impedance: 50k Ohms
    Frequency response: RIAA/IEC ±1dB, 20Hz to 20 kHz

    Dimensions - WxHxD (mm): 440 x 100 x 400
    Weight (unpacked / packed): 9.2 kg/ 13 kg