I had the M6-500i, and had a different result. The amp sounded great driving Dyn's C1's while doing the store demo, but with my then speakers (PMC) the amp sounded terrible. I suspect the amp does a great job driving less sensitive speakers with its excellent power In the end, I got rid of it and moved to a Modwright KWI-200 and have not looked back.
But I agree the MF is a great amp in its own right and with good system matching it is a great choice.
But I agree the MF is a great amp in its own right and with good system matching it is a great choice.