Interesting question...i plugged it into a power conditioner of 'top tier repute'...not necessarily a beast but was certainly supposed to be able to handle it. I admit, it had a nice sound, even a bit cleaner...after 4 weeks, the socket in the power conditioner actually melted. i have put it straight into the wall ever since, and the dealer allowed me to trade the melted unit back in for another power conditioner which i used for the source components. Note: this was with my old Antileon amp many years ago, and i definitely have never plugged the Colosseum into anything but the wall. Today, it is plugged into a special dedicated high-voltage line with the following outlet...the powercable had to be reterminated as well:
View attachment 29072
You may recognize these from the Boulder amps which use these as standard on their 2000 and 3000 series amps.
So, you had an electrician instal a high voltage (30a) line? And that outlet on it?