rattling in cold weather
 

man the rattle from the cold weather is terrible in my car. i can't listen to my music in the morning commute because of the sub rattling my entire rear end and my new exhaust, at around 2500rpm, just amplifies the rattle. now cut to lunch time when it's warmer outside, no rattles at all. i'm 95% sure it's because of the cold, but dunno what to do about it. i wonder if dynamat would fix this.

Is the rattle from the exhaust or your subwoofers? If it is from the subwoofer it might be that the materials that are incasing the woofer are shrinking in the cold and creating gaps for the materials to rattle in and when they heat up during the middle of the day those gaps are filled again not allowing the rattle.

i don't think the rattle is from the exhaust or subwoofer, but is actually caused by the two. it could be the subwoofer, but it was an enclosed shallow sub that pioneer sells for trucks. i think the rattling is more from the rear panels contracting from the cold and, as a result, being rattled by the sub and/or exhaust.