I just bought an '08 Quad with the 4 speaker system. I just replaced all the speakers to start.. When I set the fader all the way forward, and then balance all the way left, then right to test the speakers.. the right front is much louder and full range sounding than the left. Now, when I do th same to test the rear speakers, the left is louder and way better sounding than the right. I'm wondering if I may have some possitive/negative speaker wire issues. The rear speakers have gray wires, and each side has a gray with dark green stripe, and a gray with light green stripe. I have read that the dark and light greens are opposite from left to right... meaning the dark green is possitive on the right side, and negative on the left side????

 

Switch the cables to see if works better........

 

Ok, one of the Kicker KS600's in the rear has a bad solder somewhere... because the teeter works, then does not work when you wiggle the possitive terminal on the speaker... will take that back to Bestbuy.....

 

I had a similar issue with one my my speakers when I re did the system. I ended up just cutting the connector on the speaker and the connector from the truck and just wired them by hand to the proper terminal and that fixed the issue. There was just a short in the factory snap connector.