M6si - Overview At Musical Fidelity we think of the M6si as being a destination product. The M6si offers such excellent performance, facilities and power The M6si is a real high end amplifier. At 220wpc, with high current delivery, it will drive virtually any loudspeaker easily. Internally the M6si is configured as two independent monoblocs with a separate preamp, but all mounted on one pcb. Its technical performance is about equal to the M6si. The M6si In Brief 220wpc 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. Preamp output offers greater flexibility should you need for your system to grow.