Quote Originally Posted by Florian View Post

The most important topic was not even discussed in this thread, room acoustics and the integraton with the meain speakers. It does not matter if the amplifier is attached to the subwoofer or not....

Cheers
I think you missed this comment on post #7

I do not think either passive or active subs offer any advantage over the other. I use both types, and get great sound from both types. Calibration and room placement are more important than active or passive.