I bought dual 12 in kicker and boss 1100 watt monoblock back in december. when my friend installed the subs they sounded great, but after 2 weeks it was cold out and when i started the car the subs were playing extremely faintly. So I asked my friend about it said they might be blown so i returned the subs and when i got the new ones in the mail they sounded like they originally had when my friend first installed the old ones, but now today after a week it started to snow and i had left my car for an hour. When I came back the subs were playing faintly yet again. I am really starting to get frustrated and do not want to return the subs yet again. Does anyone one know what the problem is? If further info is needed to diagnose I will provide.