I owned a MA6500 for a while. Great amp. Very powerful and dynamic. Sold it and immediately wished I had it back. Had to go to tubes to get the same smooth sound at a fraction of the power. Oh well.
If you buy new, you should have no problem with service. Read the threads: even used, reliability is unquestioned.
If you buy new, you should have no problem with service. Read the threads: even used, reliability is unquestioned.