Coming from someone who has actually used after market powercords, yeah, adding them to the M&K S-150P's I had made a difference. The difference was subtle to me though, and was only worth it to me since I received a massive discount (75% off) on'em; yet, to many of my friends (who have actually used after market powercords in their systems) have said to have noticed a significant improvement. Will it improve the performance of your receiver enough that you will hear a difference? Maybe. It sure wouldn't hurt to try and find out. If your ears hear a difference...cool! If not, you've saved yourself some cash. Let us know how it turns out.