So I've been having an intermittent issue with my home theater setup. The front left tower speaker will sound buzzy/fuzzy like the speaker is blown. It sounds like this in both the tweeter and woofer, which are separate. I originally thought it was just the tweeter, and I've removed and reinstalled it a few times. It goes away for a while, then comes back. It happened again tonight, and I got tired of it. I hooked it up in place of the front right tower, and it sounded fine. Took it back to the left, sounded buzzy and blown. Hooking up the right side speaker to the left wiring makes that speaker sound blown. Is this a blown channel on the receiver? Receiver is Onkyo TX-SR605.

Thanks