The Musical Fidelity M2si represents a traditional approach to high-fidelity amplification in an increasingly digital world. This fully analog integrated stereo amplifier delivers 72 watts per channel into 8 ohms and stands out for its streamlined audiophile design. Equipped with six RCA line inputs and an oversized toroidal transformer, the M2si prioritizes sound quality and durability over an abundance of features. Its energetic sound signature, characterized by dense bass and rich midrange, makes it a wise choice for music enthusiasts seeking a high-performance and long-lasting device.
An Internal Architecture Optimized for Musicality
Under the hood, the Musical Fidelity M2si reveals a meticulous and spacious internal design, with neatly arranged circuits made from rigorously selected components. At the heart of the device is a large toroidal power transformer measuring 10 cm in diameter and 4.5 cm in height, oversized for an amplifier in this category. This generous power supply gives the M2si significant current capacity, ensuring impactful performance from bass to treble, even at high listening levels.
The power supply filtering stage uses two 10,000 µF capacitors rated at 63 V, providing sufficient energy reserves to handle the transient demands of musical signals. The Darlington power transistors (Sanken STD03P and STD03N) in the output stage are renowned for their stability and linearity, contributing to the device’s characteristic sound signature.
With a damping factor of 36, the M2si effectively controls speakers, particularly in the bass frequencies where this parameter is crucial to avoid unwanted resonances. The remarkably low total harmonic distortion (less than 0.014% from 20 Hz to 20 kHz) and excellent signal-to-noise ratio (greater than 96 dB with A-weighting) attest to the quality of the circuit design.
Comprehensive Yet Resolutely Analog Connectivity
The Musical Fidelity M2si takes a purist approach by focusing exclusively on analog connections. The device features six RCA line inputs, one of which can be switched to a “power amp” input, allowing the M2si to be integrated into a home theater system or used solely as a power amplifier.
On the output side, there is a fixed-level line output (ideal for a recorder) and a preamplifier output for bi-amping or adding an active subwoofer. Speaker connections are made via two pairs of robust binding posts compatible with 4 mm banana plugs, facilitating the use of high-end cables.
The absence of a phono input and digital connections is a deliberate choice by Musical Fidelity to maintain signal purity and reduce costs. To connect a turntable, you will need a model with a built-in phono preamp or an external phono preamp. Similarly, using digital sources will require an external digital-to-analog converter (DAC). This modular approach offers the advantage of upgrading these components independently, avoiding the technological obsolescence often associated with devices that integrate digital features.
An Energetic and Engaging Sound Signature
The sound reproduction of the Musical Fidelity M2si is distinguished by its lively, spirited, and vigorous character. Unlike some amplifiers that favor clinical neutrality, the M2si offers a sound signature with texture and substance in the timbres, giving it a distinct personality.
The bass is dense and impactful, with a remarkable ability to reproduce complex bass lines with precision and articulation. The midrange, full and natural, highlights voices and main instruments, while the consistent treble adds brilliance and detail without ever becoming harsh. This coherence across the audible spectrum allows the M2si to convey a sense of energy and emotional engagement with the music.
The soundstage offered by the M2si is characterized by its stability and precision, with good instrument separation and accurate localization of performers. While it does not achieve the holographic scale of high-end amplifiers, it remains impressive for a device in this price range.
To optimize the M2si’s performance, using an audiophile-grade power cable can be beneficial, further enhancing the clarity of melodic lines and the physical impact of low frequencies.
Careful and Robust Construction
The Musical Fidelity M2si impresses at first glance with its machined aluminum front panel, which is up to 1 cm thick. This premium finish, unusual in this price range, gives the device a commanding and professional appearance. The all-metal controls reinforce this impression of solidity, while the deep yet elegant chassis is made from thick, rigid sheets ensuring excellent isolation of the internal circuits.
With dimensions of 440 mm in width, 100 mm in height, and 400 mm in depth, the M2si fits easily into a standard audio cabinet. Its weight of 9.2 kg reflects the robustness of its construction and the presence of a generous power supply. Only the multi-product plastic remote control slightly detracts from the overall quality of the device but remains functional and practical for daily use.
The M2si’s understated and timeless aesthetic aligns with the tradition of classic hi-fi amplifiers, featuring a clean front panel dominated by two large knobs for volume and source selection. This minimalist approach reflects Musical Fidelity’s philosophy: to focus on essentials and prioritize sound quality.
