wow, just replace. I don't recall any real problems with my 92 prelude but its been a long time ago. I installed a port in teh middle rear, some did have speakers but not mine. Replaced the rear deck speakers and the door speakers. Also replaced the tweaters in the dash, they make for a great stage btw. Two subs, and a 6 channel amp, headunit and mbquartz speakers made for a very nice sounding car. I may have not had the active response system like you mention though.