"I need every single one of those 200watts to drive the P/E. If I crank up to about 100db my amp is playing at 80-90% output, so I don't quite see how any of these low powered amps could drive the P/E or P/O to high volumes."
***Agree w/ Edorr for the most part. I had the PE's w/ the CJ Premier 8A, Accuphase A50V, and Tenor 75WI. I had brief audtions of both an Art Audio Jota and Air Tight ATM-2 w/ the P/E's as well. The AA Jota, totally anemic, not even close. The ATM-2, borderline, tight bass, almost the best of tubes and solid state. Ultimately I could see it being adequate for most. The Tenor was the best sounding for the most part. It has that reach out and touch, holographic sound. Really quite special. It did not grab hold of that woofer though, and bass was not great. Just a great amp, but needed an 8ohm speaker.... The CJ 8A had the juice, but in it's original form was still loose and wooley in the bass. The Accuphase stereo amp was the only one that there weren't any doubts. It controlled that 4ohm woofer w/ an iron fist. of course I stayed w/ the 8A over the A50V. At the end of the day, I always go w/ tubes. Bottom line is feed the Parsifal w/ at least a good medium powered tube amp. Think mono's w/ 4 output tubes per side. Running those ATM-2's in mono would have been real interesting. All this of course IMHO.