Musical Fidelity M5si Integrated Amplifier



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SKU: M5si Category:


The M5si is a real high-end amplifier. At 150wpc, with high current delivery, it will drive virtually any loudspeaker easily. Internally the M5si is configured as two independent monoblocs with a separate preamp, but all mounted on one PCB and with a technical performance about equal to the M6si.

The M5si has very low distortion, outstanding noise ratio and an extremely flat frequency response. Significantly it was developed after Musical Fidelity’s amazing legendary Nu-Vista 800. Consequently, some of the Nu-Vista 800’s subtle PCB layout solutions have found their way into the M5si. As a result, the M5si projects a deep and wide stereo image with very extended bass and a crystalline top end without a trace of harshness.

Key Features

  • 150wpc
  • Excellent technical performance
  • Preamp output
  • Unconditional stability, will drive any loudspeaker
  • Wide range of useful inputs including asynchronous USB and MM phono
  • Excellent hunky build quality


Power output: 150 Watts per channel into 8 Ohms
Signal to Noise Ratio: >100dB ‘A’ – weighted
Frequency Response: 10Hz to 20 kHz (+0, –0.1dB)
Inputs: 4x Line Level RCA, 1x USB type ‘B’ connector – asynchronous data stream at up to 24-bit/96kHz, 1 x MM phono input, Trigger in
Outputs: Trigger out, Fixed line level output, Variable pre-amp output
Dimensions (WxHxD): 440 x 100 x 405mm
Weight: 14.6kg

Critic Reviews

The Musical Fidelity M5si is a beautifully-engineered amplifier that combines great sound quality with high power output and ‘sultry’ looks that will integrate perfectly with any décor.” Click for full review.