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MUSICAL FIDELITY - M6si Integrated Amplifier

Integrated Amp

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Musical Fidelity M6si Integrated Amp

Musical Fidelity M6si Delivers 220 WPC, MM/MC Phono Preamp, Asynchronous USB DAC, and Impressive Circuit Design

The new Musical Fidelity M6si integrated amp is a major upgrade to the old model it replaces; its larger number of inputs inputs and completely new internal circuit design give the M6si greatly improved technical and sonic performance. The M6si delivers real high-end sound, with effortless dynamics and seemingly unlimited power. The amplifier is so stable and the dynamic capabilities are so massive, it will drive any loudspeaker easily. This is the bedrock for M6si: sound musically realistic while imparting a naturalness to the sound of instruments and voices. Because of its preamp/power amp configuration it produces wide, stable images with a clear and effortless sound quality. Bottom-end is delivered with incredible slam and depth. The M6si is Musical Fidelity's killer integrated amp, with industrial design that is simply timeless. A ton of power, an extensive range of inputs, a compact package, reliability, looks, and a fair price. What more could you want?

The original M6i's package size, power and price were spot on. What was needed was the addition of extra input facilities and, if possible, an all round improvement of technical performance, without altering its selling price.

The M6si uses Musical Fidelity's exclusive Surface Mount Design layout techniques. This reduced the size of the circuit board's footprint for a huge reduction in noise and greatly increased flexibility with internal layout. Consequently the new M6si is configured as a preamp with two completely separate and independent monoblock power amps. The M6si is a proper preamp with its own separate regulated power supply and discrete monoblock power amps, sharing same casework. This is a big change from the outgoing M6i. The M6si's technical performance is a significant advance on the old model.

The M6si performs immaculately. Because of its preamp with dual monoblock power amp configuration, both channels perform virtually identically, not what you would expect from a normal integrated amplifier. Distortion is very low at less than 0.005%. More tellingly, HF distortion is incredibly low. At 10 kHz about 0.006% and at 20 kHz an astonishing 0.007%.

The vast majority of amplifiers suffer huge increases in distortion as you go up in frequency. The M6si's meticulous PCB and circuit design means that HF performance is virtually identical to the LF performance. This is significant for sound quality. Channel separation is remarkable, and remarkably consistent. Most amplifiers (integrated or pre/power) have dramatically worsening crosstalk with increasing frequency. The M6si's crosstalk is outstanding; even at 20 kHz it is better than 82dB.

The phonostage has very accurate RIAA, within ± 0.5dB from 20 Hz to 20 kHz. Also it maintains its accuracy right out to 50 kHz. The MM noise ratio is an outstanding 93dB down whilst the MC stage is, perhaps even more amazingly, about 87dB down. The phono stage distortion is a very low 0.01%.

The 24-bit/96kHz asynchronous USB input uses exactly the same circuitry and technology as the highly regarded V-Links and other top quality computer interfaces. Jitter is virtually eliminated. Noise is incredibly low and distortion virtually non-existent. The M6si's USB input is capable of dredging the finest details from the computer source.

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Power output: 220 Watts per channel into 8 Ohms
THD (+ noise): <0.007 % typiclal 20Hz - 20 kHz
Signal to Noise Ratio: >107dB 'A' - weighted
Frequency Response: +0, –0.1dB, 10Hz to 20 kHz
    4x Line Level RCA / Phono
    1x Line Level XLR Balanced
    USB input - type "B" socket up to and inc. 24 bit 96kHz USB audio stream

Phono Input
Sensitivity: 3mV nominal (MM), 0.4mV nominal (MC)
Signal / noise ratio: >84dB ‘A’-weighted
Input impedance: 47k Ohms (MM and MC)
Frequency response: RIAA/IEC ±0.5dB 20Hz-20kHz

Dimensions (WHD): 17.3" x 4.9"x 15.7"
Weight: 47 lbs.
Warranty: Two years, Parts and Labor to original purchaser

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User Manual (PDF, 724 KB)

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