so an audio engineer that worked for Philips passed away last year and I can honestly say this man was a genius. This is a one off PAS that has been fully modified including a custom made fully rectified external power supply. I have serviced and restored dozens of these but NEVER and I mean never have I ever heard one sound this good. Full custom made pc boards, all Seimens and Telefunken tubes. DEAD quiet with zero crosstalk or hum of any kind. I cannot tell you how great this thing sounds. The circuit is very similar to my McIntosh C20 but sounds much better, and that's saying something." />" />" />" />