Grado recently demo'ed the PS1000 at a European show paired with the Graham Slee Solo Ultra-Linear Diamond Edition, so I knew I had to try the amp.
When I hooked it up, the results were superb. Even cleaner sound, somewhat smoother treble, soundstage seemed even more enveloping. Of course all this could be my imagination. Tonality of course did not change at all to my ears. In any event, I've never heard better. Then the next night, the amp went on the fritz. I hooked the PS1000 up to one of my alternate systems, with the same recording, and the magic was gone. Or at least that degree of magic. Still sounded fabulous. I've had this headphone for a couple years now, along with 80-100 others. It still feels like a privilege to own it.
[EDIT - THE AMP DID NOT GO ON THE FRITZ, I DID. THE AMP IS FINE AND IS SUPERB.]
Edited by priest - 3/21/13 at 8:04pm