That "lit up from within" quality is A.W.O.L. as well as the strength, impact and effortlessness that live music has. It's not so much as an increase in the noise floor as it's still pretty much a black background but the aforementioned qualities are simply gone.
Gone is the air, decay, in the room presence, and again, for lack of a better descriptive, that effortless strength.
For those with any technical expertise, here's a few shots from the TLP Audio page that shows what Gilbert built which replaces his previous work: http://www.tlp-audio.com/powerConditioners2.php
If you scroll down you'll see what's inside and maybe someone can chime in as to the effectiveness of the design and whether simpler (as it appears to look) is better when using better quality components.
All the best,
Nonoise