but i've heard mention of "Bose amps" (plural). is there an amp under each individual Bose speaker? Because if I do components for the doors, I was thinking of just getting a 4 way amp and just amping the rear speakers that are already there, that is-if they are currently being amped by the HU and not leftover proprietary Bose stuff... so yeah, a Bose amp for each speaker or no? Like I said, I do have an Alpine deck already in there.