Hi i recently installed a 4 way amp in my jeep. For the first week it worked great. Now however one speaker often plays way louder than the rest but not always. It also sometimes makes a bunch of static noises. I know the speaker is good because I've switched the speakers around on the amp. What ever speaker i plug into my rear left port on my amp is the affected one. Also i checked all the wiring and it all seems good. Please help!