ok, i had 2 10's w/ a 450w amp. i switched to an 800w amp and my subs didn't work. i went back to the 450w and they still didn't work. i thought it was the subs so i went and bought 2 brand new kenwood subs. installed w/ the 800w amp and still not working. the amp has power, all the wires are snug. good ground. i don't understand. it was working 2 days ago, and now its not. the radio works fine, all my speakers work, just not the subs. and as far as i know the 800w amp worked fine before it was pulled, so any ideas????