Musical Fidelity M2SI - Integrated Amplifier

The Musical Fidelity M2SI is a purist audiophile integrated amplifier that aims to deliver high-fidelity sound without unnecessary frills. Built using design principles inherited from their flagship TITAN line, it features a fully discrete Class A/B power amplifier section with a robust toroidal transformer and separate power supplies for the preamplifier and power amplifier stages. It offers about 72 watts per channel into 8 ohms, rising to 137 watts into 4 ohms, meaning it can comfortably drive many demanding speakers while retaining clarity and dynamic punch. The preamp section is especially well thought out: it uses a high‐quality Burr-Brown stepped attenuator for volume control (better channel matching than many potentiometers) and maintains low noise and distortion. Connectivity includes six line-level RCA inputs, preamp outputs (for example for bi-amping or adding a powered subwoofer), a fixed line output, and a “home theatre bypass” input to allow use of an external processor/AVR for surround while using the M2SI for front L/R. The chassis is solidly made—fully metal, with a heavy extruded aluminium front panel, and binding posts compatible with banana plugs, spades, or bare wire. There is no built-in DAC or phono stage, which reflects its emphasis on analog purity. In sum, the M2SI delivers a compelling balance of power, build quality, and analog transparency in a one-box package for listeners who want strong stereo audio without compromises.

Description

The M2si integrated amplifier takes our premium-amp technology and applies it to a more affordable price point. Drawing upon the design philosophy and insights gleaned from our mighty TITAN flagship, along with the inclusion of high-end elements such as the robust metal controls, extruded aluminum front panel, and a chassis crafted entirely from metal, the M2si occupies an enviable position for discerning audiophiles seeking an unadulterated high-end amplifier.

Warranty:

1-year manufacturer’s warranty

Features:

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
72W/8 Ohm & 137W/4 Ohm output power
Extreme power reserves for proper peak power delivery and a wide dynamic range
Pure sound quality instead of features:
– No digital circuitry: no digital high-frequency modules built in
– No phono stage: huge transformer and power amp circuitry will not interfere with low-level phono signals
HT-input: bypassed preamp-stage allows connecting home-theater processors to use your M2si as ultimate L/R channel amp

Fully Discrete Power Amplifier
The M2si delivers 72 watts per channel into 8 ohms and 137 watts into 4 ohms. This means the M2si will drive a wide range of speakers, even power-hungry models. The fully discrete power amp, complemented by its dedicated power supply and generously proportioned toroidal transformer, guarantees reserves for proper peak delivery and a wide dynamic range. Power-hungry and difficult speakers are driven with ease. Low impedance dips are managed gracefully, and the judiciously rated output devices won‘t falter under any load.

Precision Matched Preamp and PRE/POWER Configuration
The low noise preamp has its own, independent power supply. In effect, this means the M2si offers the performance benefits of a pre/power configuration with the compact convenience of a one-box design. For the best low channel volume matching, we employ a high-quality Burr-Brown stepped attenuator delivering performance way above that of conventional potentiometer designs.

The Musical Fidelity Design-Philosophy
Further flexibility is provided by the M2si‘s carefully considered connectivity, which includes six line-level inputs and switchable home-theatre throughput. We have purposefully decided against a phono input or any digital high-frequency and DAC circuitry. The M2si remains committed to unadulterated sound quality over extraneous features. The introduction of digital high-frequency modules would be at odds with the nuanced performance of the analogue pre and power amplifiers, and the substantial transformer and power amp circuitry could introduce interference to delicate phono signals.

Redefining The Amplifier
With the M2si, our aim was to distill the expertise and design principles honed through our high-end amplifiers, creating an unbeatable package in this price point. Rather than burdening the analog amplifier‘s performance with superfluous features, we opted for a puristic and audiophile-oriented amplifier design that would elicit envy from owners of more costly, feature-loaded integrated amplifiers. With a true Musical Fidelity amplifier, you receive precisely what you desire. An affordable and puristic audiophile integrated amplifier for a lifetime, solely designed for the maximum of musical fidelity.

Technical Specifications:

Output
Power	72 Watts per channel into 8 Ohms (18dBW)
Voltage	22 Volts RMS, 20Hz to 20 kHz; onset of clipping
Peak	62 Volts peak to peak
Current	25 Amps peak to peak
Damping factor	36
Output devices	1 pair per channel
Line input
THD+N	< 0.014 % typical 20Hz to 20 kHz
Signal / noise ratio	> 96dB ‘A’-weighted
Input impedance	40 k Ohms
Frequency response	#ERROR!
Connections
Line-level inputs	6 pairs line line-level RCA connectors
Line-level outputs	1 pair line line-level RCA connectors, constant-level TAPE outputs
RCA	1 pair line line-level RCA connectors, preamp outputs for e.g., bi-amping
Speaker outputs	2 pairs 4mm banana plug/binding posts
Power requirement
Mains voltages	115/230VAC 50/60Hz (factory pre-set)
Mains voltages	100VAC 50/60Hz (alternative)