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Appears to be coming from only the center channel and sometimes it sounds like the right front channel. To clarify a little more, it only seems to happen when i have the volume above -30db on the receiver and it is almost always during dialogue in a movie or tv show. Also, the settings on the receiver are all correct with low frequencies going only to the subwoofer and all channels are set to small speakers.

I have the Quintet SL's connected to a Yamaha receiver and when I'm listening to a movie or anything with loud vocal range frequencies I am occasionally receiving a crackling or popping noise. Has anyone else had this problem? What could it be?