SL,
One of the things I was thinking of was to try the BPA-300 approach done on a thread here where he just did two PA150's and drove them differentially.
Since I am doing a differential input anyway, I could just swap input pins on one channel and drive them in parallel to basically do what he did.
The nice thing about this approach is that I could try the PA150 as is and if I ran into problems I could just add the second board.
The only bugaboo is the surge problem. I've already lost thousands of dollars in equipment due to the power company and they make it really difficult to get compensation.
I guess I could make a really robust power supply with precision hard clamping and fuses as well as some whomping TVS's
I know 50W continuous into a tweeter is loud but shouldn't one plan for handling peaks? Perhaps it's just the engineer in me overdesigning.
I guess I'll have to whip up a schematic and see what the pro's here think.
Bench,
The '30 is a mono, FET optimized version. The app note for the 4702 does have some excellent performance specs.
Do you know how much you can draw through a FET without affecting performance? I think the FET's they show are good for about 16 amps or so. If they are good to any where near that, it would mean some awesome power output with even one pair.
I do have a couple of subs that will handle 1300W with dual 1.8 ohm VC's. It would be nice to build something to handle that!
The biggest plus is that the chip and FET's are good to more than double the supply voltage so they would be much more robust for power hits.