I have never used Perfectwave cables but what you think you are experiencing may not be what is happening. Some cables and power cords lower the noise floor and remove some of the "hash" we may be used to hearing. Just a thought.

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AMP's: D'Agostino Momentum's
Pre Amp: Mcintosh C-1000 & C-1000P
Sources: McIntosh MCD-1100 & MS-300, Olive 4HD, SonoS, Pro-Ject 6 PerspeX
Speakers: MBL 111F
Cables: Transparent Ultra MM2 & Reference MM2 & Powerlink MM2x