this same sub 2-3 weeks earlier the dustcap fell off. I have gotten a responce from fi. I will be shipping the sub out asap. Here are the pics of the sub. Anyone have any idea what could have happened to the sub? I have 2 fi q 10's in a shared airspace box. The box is 2.75 ft^3 box tuned to 32hz. powered by a rd audio 1750.1 subsonic set to ~25hz fi is saying over-excursion. let me know what you think.