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.

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

Specifications

Amplifier

• 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

Inputs

• 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

General

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