With the temperatures dipping into single digits, I've noticed that my sub vibrates for a few minutes (bass and treble on high) after start-up. Then its fine. Has anyone else noticed/heard of this?

 

I noticed the same thing the other day with my 04 g35x.(Black w Graphite,premium,nav and spoiler) Just like you though, I guess after the car is warmed up it goes away. The windshield seems to be creaking as well(could be the wipers maybe). I'm not sure what it is though? I have had it about a year now and have 12300 miles on it now. Aside from that the car is awesome! I love auto-sticking it except for the crappy mileage but it is a pleasure to drive.

 

your lucky...up here in canada already at double digits NEGATIVE