sub starts and stops working intermit.

Hi, i have a 94 honda accord, and recently i changed my system around alittle, cleaned it up, hid the wires and all that good stuff. Well recently ive been having an issue with the sub cuting out on me. As i drive along it will go out. Sometimes ill start the car and it wont be working, ill hit a bump and bam there it is, bumping away. I have found that i can make it kick on everytime by pushing in slightly on the subwoffer. It just starts and keeps goin, then if i hit a bump or something it stops. The subwoffer is a solo baric L7, it is a 12 inch sub. Its being run by a kenwood amp, although i cant remember the model right now. Any help would be greatly appreciated. Im thinking its the sub because i havent changed any of the wiring from before, so my guess is theres something loose inside the sub enclosure on the sub itself.~*Ben*~

I will Try, Thanks alot for your help.~*Ben*~