Audio Magic Power Cords

I use a Sorcerer on my preamp (cary SLP-05) and like it a lot.

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

Mr M- How many hours of burn-in did you allow before critical listening began? The Stealth XXX has to be powered quite a while before it performs well at all.