I have 2 Pioneer 12" TS-W31C [400W] subs in a sealed enclosure in a 01 VW New Beetle.......I DON'T want to change the factory head unit, because it's design goes with the dash and I don't want to alter it. My question is, since the factory deck is actually manufactured by Blaupunkt, I want to get a Blaupunkt amp.....is the Blaupunkt PA2100 amp any good? I also have the Blupunkt San Francisco HU, but I will only put it in if need be....but does the PA2100 amp give good bass response? I don't really care about it booming on the outside, but will it sound good in the inside of the car? My friend has a RF power series 450s amp, and I hooked it to my 12's and it sounded great....will the PA amp give the same if not a better response?