tweeters are only suppose to play frequencies off 100 + (if tuned). it could be that the accord you have is a bose system. If you have a bose system, the speakers sit at every speaker ( hidden unit). and when using factory wiring to the bose amp to speakers, the power is reduced dramatically. if the system is actaully bose, i suggest you run 12 - 16 gauge from the deck back to each speaker. if you dont have as much bass, assuming there are 4 speakers and 2 tweeters you have 6 speakers total. i beleive the fronts are wired parallell ( each is 8 ohm svc) to get 4ohm and the rears are 4-8ohms each. the lower the ohms, the more power, but dont exceed the maximum on the deck which is usually 2 ohms.