Need help from the guru's
 

I installed the soundstream 4.520 and 4 polk mm651,s, 2 in the fairing and 2 in the lowers. On a recent trip I seemed to have lost the speakers on the left side. After further investigation here is what I found. Both speakers on the left side only play at about 1/4 the volume, and the lower speaker on the right side is breaking up. like static. The speaker in the fairing on the right plays just fine.
I can plug the 1 good speaker in anywhere on the amp and it plays just fine, the other ones act as described above no matter where they are hooked up to the amp.
My question is, (and I think I know the answer), are these speakers blown or do I need to check something else?
Thanks for the help.

JR

Sounds to me like your one of the unlucky ones that got the speakers from a bad batch post your serial#'s of each speaker that will help us..............