Audio Magic Power Cords

I had the Stealth XXX with the latest mods (I can't remember what they are called). I was disappointed. The sound was very compressed no matter what combination of switch positions I tried. I compared it back to back with an ExactPower EP15A and a Richard Gray 1200S. Both were so much cleaner sounding WITHOUT sacrificing sound stage than the Audio Magic. This was a Simaudio W5,P5 system with Von Schweikert VS4.5 and Exemplar 3910 for source.
YMMV

Rodman,
The XXX was a demo unit direct from AM (and I concur with Jtwrace that Jerry is a good guy), so it was already broken in. That said, I left it in for a week anyway before critical listening.
Again, ymmv, but in my case, it did not fit.
Believe me, I wanted the XXX to work and it is a nice product but...
BTW, I still have the RGPC1200S and subsequently did a back to back with A BPT 3.5 Signature and the 1200S still won out for transparency and "cleanliness".
I should mention that I live in a suburban/rural town, i.e. I do not have a ton of commercial noise or apartment bldg issues, just the typical power company trash/surges/dropouts.
So, again, YMMV.
HTH