I have a 12" Image Dynamic IDMAX12 subwoofer in my car. It's a wonderful sub, but it somehow got a hole in the cone! It's a big hole, about 1.5"x3". It doesn't go through the center circle that is firmer, but just in the outer ring (I don't know what it's called). Anyways, how should I repair this? I don't care how it looks, I just want it sealed. Paper/glue?