Which Power Cords: I Need Some Informed Guidance

I have had a hard time "believing" in the power cable has sound qualities argument. With that I just installed a pair of "massive" power cables I won off ebay for $37.00 a piece/plus shipping.
These babies are massive and seem to be well constructed.
They are called "Miova" brand. I plugged them into my Acoustats and I must say I can hear a definite improvement. The already good soundstage has gotten deeper and the whole system seems to be quieter.Which leads me to the question;what am I getting,better current to the speakers(cleaner)or is it all about the shielding which is keeping my interconnects (Prosilways) from interference?

The system seems like it has more headroom which makes me feel like there is more current and or cleaner current.

I am sure that there are folks on here that can explain it so I will sit back and listen.:-)

"After market power cords can lower system noise by reducing noise in the AC delivery"

if this is true, and I have every reason to believe it,then what will happen as they "break in"?

I am sitting here listening and typing this string.I have just installed these power cables and the more I listen, the more I am impressed.They have really improved the system significantly.I am now a believer.

It is really exciting and improvements always are, but if things get better still by break in, then I am a happy camper.

These power cables were very inexpensive, $37.00 each. Unfortunately the only components in my system that can use them are my Acoustat 2s. It makes me want to get my Hafler 220 modified to use a non-hardwired cable.I imagine this is doable. Most of my gear is Audio Alchemy and use out board power supplies.

Emo,do you know what gauge is the Miova, any guestimate? Thanks