i like it when people want the amp mounted to their box and want like 4 extra ft. of wire so they can slide everything forward onto the backseat when they need to get the spare.......the occassional ground loop is good for ya........
my amps were frosted the other morning...it was -10degrees or so when i went out in the morning and it was frozen, so i just didnt play it. frozen amp cant be good.
the temperature won't hurt the amp, what will hurt you is the moisture. if there is that much moisture in your car, enough to condense on your speakers, then that is a sign that you have a busted seal somewhere. as soon as your amp or speakers warm up, that ice will melt...buh bye amp or speaker. if that's a normal thing for you, i'd refrain from even having the power and ground hooked up. its just asking for a disaster. its possible that ice would condense over the - and + terminal...i wouldn't flirt with that possibility.
yea i agree its a pain in the ass! ive learned a lil trick pull your wipers off the windshield before you go in for the night they wont get frozen to the windshiled and you wont have to knock ice of them and ruin them!