The bass speakers stoped working but the...

The bass speakers stoped working but the tweeters still work. The bass speakers work sometimes when you move the speaker with the readout and the touchpad on it. I think a wire came loose inside if I can open up the speaker I could fix it they are out of warranty by two months so I have nothing to lose by trying. I am a technician but I do not know how to get inside the speaker case. Can you help me? Please I love my Z 10's and I hate to replace them for such a simple problem.