Musical Fidelity M3si integrated amplifier
Integrated amplifier with USB input & MM phono Stage. The M3si integrated amplifier makes huge strides from the outgoing M3i model. More inputs, increased power and virtual monobloc power amps with their own separate power supply capacitance add up to a great new product.
The M3si offers a real taste of high-end sound quality. Because its power has increased significantly and it now has more than double the capacitance, it gives wide, stable and deep stereo images with a substantial dynamic range. More than that, the M3si offers a sweet musical sound with an effortless, clear, ungrainy quality. This is due to the virtual mono power amp configuration with increased capacitance, the bottom end is delivered with punch and excellent speed of attack.
The M3si offers high quality sound with an extensive range of useful inputs in a compact package with reliability and a fair price.
The M3si uses Musical Fidelity’s exclusive SMD layout techniques. This reduced the circuit’s footprint on the large PCB and gave us greatly increased flexibility with the layout and the ability to add more inputs and, importantly, power amp power supply capacitance. Now there is a pair of big power supply capacitors for each channel. Power is a generous 90 wpc.
The new M3si now delivers a healthy 90 wpc. Distortion at 1 kHz is very low at 0.007%. Even at 10 kHz it is hovering around 0.01%. Most hi-fi amplifiers have a huge increase of distortion with rising frequency. To us this shows that the whole circuit design/layout concept is not good enough. The M3si’s very low HF distortion proves that the layout circuit and circuit design are operating in perfect harmony so that there is low distortion at HF. We believe this validates the performance and integrity of the whole design.
Signal noise ratio has been improved by more than 3dB. This is a significant step which allows more music to be heard with a greater dynamic range.
Channel separation is excellent.
The MM phono stage is high performance. It has very accurate RIAA equalisation, within ± 0.5dB from 20 Hz to 20 kHz. The accuracy is maintained out to 50 kHz. Noise ratio is an outstanding 88dB down. Distortion is less than 0.3%. The M3si’s phono stage offers potential of great MM performance.
The 24 bit 96 kHz asynchronous USB input uses exactly the same circuitry and technology as their highly regarded V-Links and other top quality computer interfaces. Jitter is virtually eliminated. Noise is incredibly low and distortion virtually non-existent. The M3si’s USB input is capable of dredging the finest details from the computer source.
Power 85 Watts per channel into 8 Ohms
Voltage 27 Volts RMS, 20Hz to 20 kHz;
onset of clipping
76 Volts peak to peak
Current 25 Amps peak to peak
Damping factor 36
Output devices 1 pair per channel
THD+N < 0.014 % typical, 20Hz to 20 kHz Signal / noise ratio > 98dB ‘A’-weighted
Input impedance 40 k Ohms
Frequency response + 0, –0.1dB, 10Hz to 20 kHz
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
USB Asynchronous, sample rate up to and inc. 24 bit, 96 kHz USB audio stream.
USB input Type “B” socket up to and inc. 24 bit 96kHz USB audio stream
Phono inputs 1 pair Phono MM inputs
Phono grounding post 4mm banana post to chassis earth
Line level inputs 4 pairs line level RCA connectors
Line level outputs 1 pair line level RCA connectors,
PREAMP outputs for . biamping
Speaker outputs 2 pairs 4mm banana plug/binding posts
Consumption <0.5W in standby mode 320 Watts maximum
Weight Unit only, unboxed 9.2 kg in shipping carton 13 kg
Dimensions Wide 440 mm High, including feet 100 mm Deep (front to back) including terminals 400 mm
Standard accessories IEC type mains lead 10-Amp type
Remote control M3s series Batteries LR03 or AAA
Also available in Silver