i have my cdt cl6x run off my 8500mp h/u. i noticed my left speaker plays but sounds muffled. you still hear mids but when i go to the right speaker it sounds much more crisp and loud. also when i fade to the back left speaker it plays as if there is no tweeter hooked to it, only mids. whereas the back right one when i do that plays just fine. any ideas on what the problem is and how to fix it?