Musical Fidelity M6si500

The M6si500 is a stereo integrated amplifier designed to deliver high power while combining preamplification and amplification functions within a single chassis. It is intended for use as the core of a high-fidelity system, capable of directly driving a pair of speakers without a separate power amplifier stage.

Its output power reaches 500 watts per channel into 8 ohms (27 dBW), giving it a substantial current reserve to drive speakers considered difficult to load. Each channel is built around 12 bipolar transistors, with peak-to-peak performance of 200 amperes available to meet transient current demands. Total harmonic distortion (THD + noise) remains below 0.01% typical between 20 Hz and 20 kHz, with a signal-to-noise ratio greater than 100 dB A-weighted, and a frequency response of +0/–0.1 dB between 10 Hz and 20 kHz. The unit adopts a dual mono architecture: each power amplification section has its own heatsink and its own transformer, while the preamp benefits from a dedicated power winding. Volume control is digital, based on laser-trimmed substrate resistors, for precise tracking even at low listening levels.

In terms of connectivity, the M6si500 offers five inputs: four RCA line inputs (one with home cinema bypass) and one balanced XLR input. It also features an RCA preamp output and a fixed RCA output, allowing integration into a larger setup or the addition of a recorder.

This model is aimed at enthusiasts seeking an integrated amplifier capable of driving speakers demanding in terms of impedance or sensitivity, in a system where the simplicity of an all-in-one amplifier remains preferred over a separate preamplifier/power amplifier combination.