Musical Fidelity - M6si Integrated Amplifier (Black) M6si  Design and Build We felt that 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. Performance The M6si performs immaculately. Because of its pre amp with two monobloc power amp configuration both channels perform virtually identically, just what you would expect from a pre amp with separate power amps and not what you would expect from a normal integrated amplifier. The M6si is a cut above everything else. 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%. Channel separation is remarkable, and remarkably consistent. Most amplifiers (integrated or pre/power) have dramatically worsening cross talk with increasing frequency. The M6si cross talk is outstanding and even at 20 kHz it is better than 82dB. USB Input The 24 bit 96 kHz asynchronous USB input uses exactly the same circuitry and technology as our highly regarded VLinks and other top quality computer interfaces. Jitter is virtually eliminated.