Get some dedicated 20 amp circuits and try again, this will be the biggest upgrade you can do for little money comparitively. The newer PS audio doesn't regenerate the whole AC sine curve like the older units hence they can power more watts and don't generate so much heat.
Does your Powerplant have the Multiwave 2 module in it? I found this to be definitely better than the standard when I owned a PS300.
Does your Powerplant have the Multiwave 2 module in it? I found this to be definitely better than the standard when I owned a PS300.