Well, this thread is now over 13 years old, but as one of the original contributors I just had to update it with my PX25 experiences in the intervening time.
The Audion PX25 Silver Night MkII that I had back then is still driving my Fab Audio Model 1's flawlessly. It's playing right now, as a matter of fact. It was out of service from 2010 to 2018 due to my lack of space for the system, so it just sat in the basement collecting dust along with the rest of my components : a Tom Evans Vibe/Pulse preamp, an Audio Note 4.1x Balanced Signature DAC, my Fabs and an ACI Titan sub.
I just set it all up again recently following my wife's death, and it is blowing me away as in days of yore. I guess almost a decade of listening to nothing but computer speakers made my ears hungry for music, and even the arrival of hearing aids hasn't dampened the pleasure. After a re-tubing the amplifier is rock-solid, and behaves as though no time had passed at all. I had forgotten just how damned good that amp is.
Kevin, if you're still out there I'd love to regain contact. I still remember my visits to your place fondly.
Here's to Audion, the PX25 tube and music.
