[jeffreyj900]

My audio equipment is plugged into a UPC-200. Video equipment is plugged into a Monster HTS-5100.

 

[flohmann]

Source and headphone amp are plugged into a PS Audio P300 (with recent PS Audio upgrades). Everything else into a PS Audio Duet.

The P300 makes a very clear difference.

 

[courierdriver]

I use a Monster powerstrip (don't know model, and I don't feel like unplugging everything to find out) for my comp gear. My amp is plugged into an old Tice Micro Block powerline conditioner. I've tried the amp direct into the wall, and I feel it sounds better with the Tice (ie. more dynamic, better details, overall smoothness, and lower noisefloor) compared to direct into the wall. I live in an old apartment building (with lots of fridges, stoves, microwaves, phones, etc. very close-by, and feeding off the same powerline I'm using), so it makes sense that the conditioner makes things sound better overall.