So winter's fast approaching and I need to know if I should be taking my sub and amp out for the winter, here it can get to around -40 so it's just kinda cold... Do I need to take them out?

 

Well as for the amp... it probably prefer the cold temps, electronics like the cold. as for the sub I might be worried about the rubber, glue, and maybe plastic at -40 . just because they can be stiff and less flexable. Maybe just keep the stereo off untill the cab has had a chance to warm up a bit. but no I wouldn't go as far as removing them though.

 

just don't bump them hard right away when its cold, let it warm up a bit also. or like john said, as the cab warms up.