Quote Originally Posted by Feanor
Well, the Monarchys do have 60,000 uF per side and I don't imagine it would be safe up the voltage.
No, I would only increase the capacitance given the design. Point to ponder: my thirty year old Stasis 3 runs 50,000 uF @ 65 volts while a pair of SM-70 Pros run 120,000 uF @ 30 volts. Which one has nearly twice the energy storage as the other?

Quote Originally Posted by Feanor
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.
It is quite easy to do. Measure across the positive and negative leads of the caps.

Quote Originally Posted by Feanor
The capacitance is only 14,400 uF per side. One guy did up grade to this PS board...and has 6 x 18,000 uF (or 54,000 uF per side).
I would focus first on raising the rail voltage since energy storage goes up with the square of voltage. It may require using a different transformer.

rw