Ok, I have a 4 ch memphis pr50.4. Its in mint conditions and 100% functional.
same as this one on e-bay http://cgi.ebay.com/Memphis-16-PR4-50-4-CHANNEL-CLASS-AB-AMPLIFIER-800W-NEW_W0QQitemZ290298728531QQcmdZViewItemQQptZCar_Amplifiers?hash=item290298728531&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
Pics http://www.caraudio.com/forum/showthread.php?t=391072
I'll take $110shipped .
same as this one on e-bay http://cgi.ebay.com/Memphis-16-PR4-50-4-CHANNEL-CLASS-AB-AMPLIFIER-800W-NEW_W0QQitemZ290298728531QQcmdZViewItemQQptZCar_Amplifiers?hash=item290298728531&_trksid=p3286.c0.m14&_trkparms=72%3A1205%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50
Pics http://www.caraudio.com/forum/showthread.php?t=391072
I'll take $110shipped .
