[chris15]

When I put my Polk components in, I tested them, sounded great, put all my panels back on, drove around the block and the second I turned the speakers up, I noticed that the left tweeter was extremely, extremely quiet, giving me a very odd mix of sound. I, like you did, adjusted my balance to compensate until the next day when I could pull everything apart again.

My problem was that I had soldered my new speakers in, and one of the grounds on the tweeter had let go as I was installing it, but because the space was so limited inside the hole for the tweeter, the ground wire was still rubbing on the connector, so I was getting sound but nothing good.

Unfortunately in your case, you're probably going to have to pull it all apart again, and check all of your connections.. :/