Hey Steven,
Sorry to hear that, are you sure that your levels aren't unbalanced with respect to the surrounds?
It looks like you didn't get the Onkyo from us but regardless it should still be under warranty, I believe it's 90 days for parts and labor and then 2 years for parts and you should be able to get it serviced reasonably quickly.
Just let us know if there is anything else we can do to help or feel free to give us a call or log into webchat.
Jason Hicks
Aperion Audio Guru