M3si Stream | Streaming Music System

The M3si Stream is a high performance integrated amplifier with WiiM Mini for streaming add-on.

M3si Stream Front Panel
M3si Stream Rear Panel
M3si Stream Extra Image

M3si Stream - Overview

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.

Fully Discrete Power Amplifier

The M3si delivers 85 watts per channel into 8 ohms and 150 watts into 4 ohms. 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.

The Musical Fidelity Design-Philosophy

Although it belongs to Musical Fidelity’s lower priced amplifiers, it embodies our hallmark values of uncoloured, stress-free sound, outstanding technical performance and great value for money. Our aim was to distill the expertise and design principles honed through our high-end amplifiers, creating an unbeatable package in this price point.

Musical Fidelity NOW streams

We’ve seen a surge in offerings from HiFi companies with all-in-one solutions, sometimes with big displays on top. Unfortunately, such developments mean that sound quality suffers. At Musical Fidelity, we acknowledge that any WiFi or BT circuitry generates a substantial amount of RF pollution and distorts analogue amp circuitry when incorporated into integrated, one-box solutions.

Musical Fidelity stands for sound quality and robust design that lasts for decades

We INVEST our money and resources in top-tier hardware and the pursuit of optimal music reproduction.

  • Robust mechanics - Discrete circuits - Huge transformers - Class A/B amps.
  • No HF and RF distortion.

We aim to have the best hardware and sound quality in every price range and make true high-end affordable.

We are partnering with one of the best STREAMING SPECIALISTS - the US Californian high-tech company LINKPLAY.

The M3si Stream includes a free WiiM Mini

The separate box and separate power supply ensure that we reduce RF and HF radiation and we can keep our analog amplifier technology as good as it is. LINKPLAY offers state-of-the-art technology, seamlessly compatible with any contemporary streaming service on the market, all navigable through an INTUITIVE and user-friendly APP. Moreover, their consistent maintenance and software updates ensure an optimal user experience.

M3si Stream In Brief

Musical Fidelity NOW streams

  • WiiM Mini adds modern streaming
  • Streamlined and easy setup
  • Countless streaming services and options
  • Best of both worlds:
  • Classic analogue high-end amplifier
  • Modern streaming in a separate box
  • Amplifier

  • High-end circuitry inspired by TITAN
  • Fully discrete transistor based Class A/B power amp design
  • Drives power hungry speakers with ease and gracefully manages low impedance dips
  • 85W/8 Ohm & 150W/4 Ohm output power
  • Extreme power reserves for proper peak power delivery and wide dynamic range
  • HT-input: bypassed preamp-stage allows connecting home-theater processors to use your M3si as ultimate L/R channel amp
  • Preamplifier

  • Low noise design for best THD and signal integrity at low as well as high levels
  • High quality Burr-Brown stepped attenuator for better channel matching than conventional potentiometer designs
  • Pre Out for bi-amping with M6sPRX or active subwoofer connection
  • USB input with meticulously careful digital circtuitry layout to minimize HF interference
  • Phono input for turntables with MM or high-output MC cartridges
  • Mechanical Construction

  • Uncompromising metal work in typical Musical Fidelity tradtion
  • Clean, stunning and indestructable metal exterior protects against electromagnetical interference
  • Reviews

    Read the Stereoplay review.

    Also read the AUDIO review.

    Read the AUDIO TEST review.

    M3si Stream - Specifications


    • Power output: 85 Watts per channel into 8 Ohms; 150W into 4 ohms; 288W peaks into 2 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

    M3si Stream - Downloads

    Product Information Sheet

    M3si Stream Information Sheet (English)

    M3si Stream Information Sheet