Metaphysics: The debate is so wide over cables in general, you really should use your ears to decide. I have never upgraded the PC on my amp, because it is still under warrenty and the PC's (two pieces) are integral. I did use an inexpensive PC by Harmonic Tech on my CD player which I recently moved to my DAC. The improvement is a major one in my system, however I also have a poor AC source (live in an apartment building in LA) and am around TV and radio stations as well. You can demo PC's from the cable co for shipping charges and perhaps a small fee (not certain, maybe no fee), I also assume that you would pay for the cord, to be refunded upon return, but check with them. The Cable Company's web site is at (fatwyre.com/). They will also help you select a chord or chords based on your equipment, budget and taste* (* use the comments box on their request screen). If the chords do not do it for your system, you can move on with having spent very little money to audition the chords.