What the!?....

I got a new dash kit for my car b/c my old one broke so once everything was done im hooking it up and shit got that done, so then i turn on my radio and cd player and my 15 sounds like its going crazy with bass so i turned the volume down and it doesn't do anything still shooting out bass. I double checked everything is connected and shit so i don't know help me out!

I think you should check to see if you've got a good ground connection.

you got me stumped ... my only guess would me that you pinched one of the RCA cables and the shield is now a chassis ground.