Originally Posted by Warlock III
The infinity has a factory installed amplifier, and 4 wires running to the speakers.
If I recall, the entire system is dependent on the factory amp. That usually means that it's an all or nothing scenario. However since you have bass it sounds as if you have at least power going to the amp. I'd start by checking all of the connections especially behind the head unit. It almost sounds as though the PO wired the speakers independently and the tweets directly to the unit.
However, it does sound as though it's just a blown speaker.
I think it may be a blown speaker, although I hope its not... Was I really listening to Def Leppard that loud? Lol, umm I'm not sure what the PO did, the Amp turn on wire appears to be disconnected, and there is a nunch of wire harnesses back there. I guess I will have to troubleshoot later on tonight or tomorrow depending when I get off work, I think i'll disconnect the drivers front speaker and connect the leads to the passenger output on the HU and then connect the passengers speaker to the drivers output and see what happens.. Will report back..