Quote Originally Posted by E-Stat
If you're still in the tinkering mood, I might suggest beefing up the power supply for either amp. That is an area where most amps can benefit given the size of the standard supply. I suspect the Monarchy amps would most have more punch and openness with a stiffer supply. Perhaps your new amp might also respond well to having more joules.

rw
Well, the Monarchys do have 60,000 uF per side and I don't imagine it would be safe up the voltage. In any case I'd be further ahead selling the Monarchys as-is since I pretty sure I like the Class-D-Audio better anyway.

The CDA SDS-258 is amenable to an upgrade and I know that some have done it. It will handle up to +-70 volts. I'm not sure what the current PS actually supplies since the transformer doesn't specify the DC output; maybe I could measure it with a multimeter. The capacitance is only 14,400 uF per side. One guy did up grade to this PS board from Connexelectronic which will handle 71 VDC and has 6 x 18,000 uF (or 54,000 uF per side).