Does an aftermarket power cord matters for Amp?

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.

I became a beleaver in the benefits of a good PC not when I pluged it in, but 30 days later when I tryed to replace it back with the original one.

I use a Custom Power Cord Company Model 11 for my Plinius 8200 integrated with great results. Very synergistic combo.

Although I have never had the privilege of trying Subaruguru's Prelude No. 13 in Cu, when I ran the top of the line Mapleshade power cord from amp directly into the AC wall outlet, there was an obvious increase in dynamics, transient speed, and bass extension (plus, other improvements) for my Aronov Audio LS 960i tube integrated amplifier.
The VAC Avator has a comparable performance, so I am sure you will be pleasantly surprised how much a better power cord contributes to enhancing an already great component.
As pointed out by Stuartbranson, there can be very impressive power cord performance for a moderate price.

Cords that have made a significant improvement are from Kubala-Sosna Research - and yes - on the amps even more than the CDP. www.kubala-sosna.com. Good Listening!