ok heres the deal....i just got a 12" sub and a 300 watt amp for my 2000 prelude. but with really fast songs like techno and stuff, the sub cant keep up at all. the guy that installed it says that its because my car has the acoustic feedback system or something like that. he said if i got an aftermarket head unit, my problem would be fixed. but he said he didnt know whether the amp that came with the stock stereo system is in the stock head unit or if its somewhere else. does anyone know where its located? im not too familiar with sound system wiring and stuff, so any help you guys can give me would be greatly appreciated.