Hello:
Just thought that I would share my experiences with the ESP Reference power cord.
I have a Running Springs Audio JACO with Mongoose PC. A very nice combo, but after having read an ad from "The Cable Co." about how the Mongoose power cord may not be the the last word in frequency extension (audio nervosa set in), I decided to try an ESP Reference with the JACO and WOW, what a difference! (The ESP has been getting some great reviews and is not obscenely expensive.) Not only was there much better frequency extension, especially in the highs, but there was less noise, along with better imaging and more detail. I think there is no contest, at least in my setup and definitely a keeper! I have not tried any other PCs, since I have neither the time nor $$ to experiment to any great degree.
Happy listening.
Glenn
DALI Helicon 400, Butler Audio 2250, Jeff Rowland Synergy IIi