Sorry for delay on results. Better late than never I suppose..
So building the caps into the J10 connected cable (by bridging power and gnd pins/wires) seemed to have little if any effect. However putting it directly across the diode bridge worked pretty well and cut out a lot of hum. I went with a 4100uF cap, since 8200uF seemed to have no added benefit, but was noticeably better than 100uF and even 1000uF.
I also wired in a switch in series with the J10 cable to simply break the power pin, and JB welded it to a cutout on the back panel. It's pretty dumb but works to completely kill DSP+associated noise (both hum and the slight digital "air" noise). Just make sure the amp is powered off when toggling this one or you get a great pop.
Thanks for all the help! I think I have the best of all reasonably possible worlds now with this amp.
So building the caps into the J10 connected cable (by bridging power and gnd pins/wires) seemed to have little if any effect. However putting it directly across the diode bridge worked pretty well and cut out a lot of hum. I went with a 4100uF cap, since 8200uF seemed to have no added benefit, but was noticeably better than 100uF and even 1000uF.
I also wired in a switch in series with the J10 cable to simply break the power pin, and JB welded it to a cutout on the back panel. It's pretty dumb but works to completely kill DSP+associated noise (both hum and the slight digital "air" noise). Just make sure the amp is powered off when toggling this one or you get a great pop.
Thanks for all the help! I think I have the best of all reasonably possible worlds now with this amp.