Sorry, old post... but I was just looking around on the net, and something caught my eye.

Although I have been told by Alpine (and others) that the rattling noise I have been experiencing from my SC is probably the bearings in the nose cone (having bought one without the sealed bearings, obviously). I'm wondering, though, if it is a possibility that it could be a loose snout coupler? (hence THIS page).

It may take a while for a snout coupler to loosen, but this guys problem sounds very similar to the one I (and a few others) have been having/had.

Anyway, just a thought.