Only thing is my front 850 sigs are having a buzz when I play some mp3's in the second cone from the bottom, but I don't think this is the speaker because I don't get this from other sources like bluray.
The driver probably needs to be tightened. It is a common issue with Rocket speakers.
Use the appropriate screwdriver and gently tighten all of the screws. Be sure to not over tighten it.
You might also want to check the polarity of the 850s using the battery test. Some of my drivers were wired out of phase and I've read posts from quite a few others with the same issue.
