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  • Description

  • Specifications

  • Reviews

M6si | Integrated Amplifier

The M6si is a new amplifier with incredible realism and emotional involvement.

At Musical Fidelity we think of the M6si as being a destination product. The M6si offers such excellent performance, facilities and power that unless you are seeking the most exotic high-end sound quality you would never need another amplifier. We believe it’s that good.

Internally, the M6si is configured as 2 independent monobloc power amps with a separate pre amp. It is, in fact, a pre amp with 2 monobloc power amps that just happen to share the same casework.

The M6si has 220wpc. It has very low distortion, outstanding noise ratio and extremely flat frequency response. Its inputs are phono (MM/MC), 4 line level, 1 balanced XLR and 1 USB ‘B’ up to 24bit 96kHz asynchronous.

The M6 combination of high power, high current and extraordinary stability means that it can drive any loudspeaker with ease.

In use it is hard to hear any practical difference between the M6si and other much more expensive amplifiers. In proper blind listening comparisons, the M6si performs incredibly well. If we sound rather enthusiastic it’s because we are.

We love the M6si and hope that you do too.

M6si In Brief

  • 220WPC
  • Excellent technical performance
  • Amazing load driving ability, unconditional stability will drive any loudspeaker
  • Wide range of useful inputs including asynchronous USB and switchable MM / MC Phono
  • Preamp output
  • Internally it is a separate preamp with two independent monobloc power amps; effectively a separates system in a box
  • Excellent, hunky build quality


"Plays with irrepressible temperament, contour sharpness and verve"
Jürgen Schröder - Stereoplay 09/14

"For many people who are spending this kind of money, it's exactly what you're looking for." 
Watch the Video
Sean Fowler - Zero Fidelity 10/20

"The level of musicality and dynamic skills is impressive"
Michael Lang - Stereo 02/15

"The best mix of musicality, beauty and power is found in this noble amp"
Thomas Kirsche, Stefan Goedecke - AUDIO TEST 08/16

"The symbol of the integrated amplifier."
LowBeats 07/18

"A lot of sound, a lot of power, rich equipment"
Fono Forum 08/15

Ingo Schulz - Fidelity 03/16

"Made with passion!"
Olaf Sturm - Hifi and Records 02/15

Features & Specifications


Power output

220 Watts per channel into 8 Ohms

THD (+ noise)

<0.007 % typical 20Hz - 20 kHz

Signal to Noise Ratio

>107dB ‘A’ - weighted

Frequency Response

+0, –0.1dB, 10Hz to 20 kHz


4x Line Level RCA

1x Line Level XLR Balanced

1x USB type ‘B’ connector - asynchronous data stream at up to 24-bit/96kHz

1 x switchable phono input

Trigger in

Phono Input


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


Trigger out

Fixed, line level output

Variable, preamp output


Dimensions - WxHxD (mm)

440 x 125 x 400

Weight (unpacked / packed)

16.6 kg/ 21.3 kg

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