Re: New QSC amp ????
I probably don't need to get off in the weeds with you about techie minutiae but, in an ideal world feeding power switching pairs with the same PWM input drive "should" result in identical output. In the real world there can be very small timing differences at the output due to sundry device switching speeds. If these switching outputs were hard wired to each other, fun could ensue.
Since each amp power section requires it's own output filter, and the amps (probably) don't get connected to each other until the very output (after the filters), the inductance of two output filters in series between the two switching stages probably keeps the current from the very small timing differences well under control.
Next issue is how negative feedback from after the output filter is handled for combined amp stages. But this is all low power feedback signals so manageable.
I like the concept, good luck.
JR
PS I bet it fits nicely inside your powered speakers. Tell the guys that want access to your FIR filters that they should just buy QSC powered speakers. 
