OK with the help of a buddy that knows what he's doing we got all my stocks replaced and installed and amp conected to the two door speakers. The door speakers are alpine type R 6.5's . Amp is a piece its a pyramid 300watt. Anyways everything works except the tweeters we installed in the doors are makeing a wierd interference sound. And when say my wipers are running the sound changes in tune with the wipers moving. Also accelerating and deccelerating does the same thing. Can fix this by pushing the crossover button on the amp, but then the front speakers dont sound like they are even working. Is my amp just that much a peice or is there another problem?? Everything looks to be installed perfectly so i dont really understand what this could be. Please help. And by the way the infinity plate 4X6's sound great. Type R's sound great too except for i really cant experience their true sound with this annoying tweeter problem. Thanks in advance.