Does an aftermarket power cord matters for Amp?

Yes, An after-market PC will make a difference. If you are skeptical of this, find a company that has a 30-day money back trial policy. As for a company like this, I would recommend a company in New Jersey called Virtual Image. Their power cables are called the Pile Driver and the Sledgehammer, Pile Driver being the better of the two. I use V.I.'s power cables on all of my components (Pile Drivers on my CDP & pre and Sledgehammer on my amp). If you are interested in trying the V.I. cables, you can e-mail Al at virtualimage@juno.com .

I personally have never tried a Synergistic Research PC, but I have tried the Ensemble Mega's, which I am told are better than the Synergistic, and the Sledgehammer just flat-out smoked the Ensemble cables.

If I can be of any further help, please feel free to e-mail me. BTW, Virtual Image also makes some killer interconnects!!!

Hi Steve. I responded to your system post before. I am a believer in the benefits of better power cords because in my system they make a difference. I recently went through a cable downgrade, $$ wise, but have found some really good cables cheap. Check out ErnieM's (aka Subaruguru) power cords. I recently got his new Prelude No. 13 in Cu, and it is really great! I recently sold off my shunyata and electraglide cords and got his and don't feel I've sacrificed quality. I do find that changing a power cord anywhere in the chain makes a sonic difference and have yet to find that a stock cord is better.

It did for me. I noticed a big difference in replacing the amp PC.

The evidence that has come my way leads me to believe that a PC CAN affect the sound from an amp, or any other component. That may be for better or worse. When I experimented my amp sounded better with its stock cord over two aftermarket cords. From stock, a third cord did not alter the sound at all.