Sub problem

I just hooked up a system in a friends car. He has a profile ap1200 2 channel amp. Only one sub is working, all wires are hooked up correctly, and both subs worked on his old amp. Could it be a blown fuse, or if that was the case wouldnt none of the subs work? Please help!

maybe a fuse in the amp is blown. i don't know if one blows (assuming there are two+ in the amp) it only affects one channel or both. check them.

nevermind the problem is fixed for some odd reason???

loose connection maybe?

hey i have two 12'' alpine type E with a 1000 watt kenwood amp.I recently started hearing like a dog panting kinda noise from my subs.They still hit hard,could it be the box?i have a couple of screw holes from where i moved my amp on the box

Sounds like an air leak. Could be anything. Fist plug the holes where the amp was with screws. If that isnt it. Get non-drying silicone for the sub and make a gasket in between the enclosure and sub.