If it is the front doors don't worry about the Acoustic Feedback System because the front two speakers don't use it. The back two are the only ones that use the system. The head unit does not do the processing for the system as well. It is all done in the trunk of the car by the 6x9s in the back. If you still want the tweeters in the door to work get a component speaker. The following link will explain everything you need to know about the audio system in a 5th gen prelude.

http://bellsouthpwp.net/v/i/vidgamer/preludeaudio.html