i got a crate tv-412-ev cabinet. even with the bass all the way down it vibrates like a honda civic with a system.ive checked to make sure everything is tight, and the speakers look fine, no tears or anything, although i did see the magnets were chipping, probably cuz of the vibrating. the cabinet supposedly handles 800 watts, and its never seen over 100 watts and its an 8ohm cab , and obviously im running it on 8 ohm.so i dont understand why its vibrating so bad. it makes recording really hard cuz all you can hear is"brrrrrrrp brrrp brrrp", any ideas on what could be wrong with it?