I always wanted a beogram 4002, and found one last week, they three days later I ran across a RTS Systems 405 professional preamp. So I decided to test it out with my Beogram TX, and all I can say is WOW what an upgrade. Heck I haven’t even set the RTS up yet as I have to get a test album, and want to do it with the 4002 once I have it ready. I have the RTS & TX running into my Beosound 9000, with 4 Penta 3’s.