Just to end this discussion (for me anyway), I will do my ultimate comparison. I have purchased 70 feet of Romex 10/2 Simpull wire and ordered Furutech GTX-D(R) Duplex Receptacle, FI-32M(R) Plug and 106-D-NFC Receptacle Cover. Now I know the 10/2 adds nothing to the party as 12/2 would provide all the current my system will ever need and the 20 amp breaker can draw, but I found Lowes was selling the 10/2 at a cheaper price than Home Depot was asking for 12/2 so I bought the heavier cable. I will be running the new line out of my mechanical room directly into my garage and up to my listening room. Meeting all code requirements along the way. When done I will be able to demo equipment on 15 amp vs 20 amp. Furutech vs $2 contractor plug, with and without power conditioiner in the loop. This will take about a week but I will make a full report for anyone interested. Open to suggestions on musical selections that may provice the best opportunity to hear the difference. Cheers.