I had one query about the power supplies so am sharing the information here in case it's of use to anyone else: the amp has an 800 watt transformer with 2 x 400 watts @ 25v ac for each channel. Then there are two power supply modules each with 88000uf of capacitance, 2 x power supply modules, 2 x output protection modules, and one slow start module. With such an amount of capacitance the power supplies operate pretty much independently of the transformers and in any case there are two separate windings there.
David