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.


"This is an amplifier that sounds far beefier than it's spec sheet would lead you to believe. In fact it exhibits such control over virtually any loudspeaker we connected to it and does so with an ease that you would come to expect from costlier components or more powerful ones."


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Musical Fidelity M3si

  • Amplifier

    • 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