My plate amp just died on me, so I am looking at replacing it . It is verry old so thought it would be best to replace the old 200wrms to something alot beefier. I do not mind upgrading but do not want to do constantly. That is why I would like something with plenty of power. On the question of the servo sub amp issue, Just what is a servo sub amp and does it have to be combined w/servo sub? To my recollection, I was thinking they work in harmony as a push/pull operation with the cone driver to make return of cone faster. Also less distortion and more accurate. Any thoughts?recommendations?