Power cords......

I don't understand your wisp comment but I experienced a bigger soundstage. I now own 3 RGPC 400 pro units. Bought first one and was very impressed so bought another for second system and then took a leap of faith and bought one for my LCD(my kid says blacks are darker). Each of these have a 1m HTW 20amp on them. To me it made a big difference in the bass response, more verve. I bought the 1m used from 200-275. you want a short fat pipe to the wall. From 400pro to components not as much of a difference but enought that I have 2m Richard Gray HTWs on my main system CD and amp and REL R505 subwoofer(big difference). Also just bought another 2mm one for second REL R505 subwoofer in basement. These blew away my Nordost Shivas (now on LCD and blu-ray) and Vishnus (now on seond system cd and receiver)as to sonically hearing more Verve/authority. For subwoofer I found the HTW less noisy than a signal cable 10gauge I bought and resold. Vishnu cost about same 2nd hand.