i've been wanging my new 15's pretty hard lately and they always have this funny smell. i think its just new subwoofer smell, but its all throughout the truck, stronger than the freshly built box smell.
burning coil would smell the same as any burning electronics right? i'm not reaching the mechanical limits but they've got some serious power on them. if i was smelling burning coil and didnt back it off i'd have fried subs within a few minutes right? i just drove about 3 hours with it slamming about half the time, so i think i'm good but i want to be sure.