I'm a fan of the little Onkyo M-501. This ISN'T as bad an amp as most think. A few power supply upgrades(power cord, caps, bridge, ect). and it'll get with it. I'm considering getting another one and using a Hafler DH-222 bridging module type device. I can etch the PCB's myself, and I've reviewed the schematics of BOTH amplifiers(M-501 and the DH-200). They're both common ground, so I don't see any reason why this won't work. So have I lost my mind or do I need to post pics of it when it's completed?