I have a Dr. Bass Rx212. Loading it into the car the other night I heard something fall in the cab and rattle around. Got it home, took off the control plate, reached in, and the tweeter was laying inside.. It is still attached to the wires, but it fell off of the plastic mount (looks kinda like a hollow bell-shaped cone). The speaker itself slides over the "hollow bell-shaped cone" and maybe seems to just need some kinda glue to hold it in place, but that's where my expertise ends. For now I have simply put the speaker back in place, but next time the cab moves it is liable to fall right off the "hollow bell-shaped cone" again. That said - what can I do? I don't want to ruin anything by using the wrong materials. And for the record, I have called Marc Serio. Twice (Monday and today) with no response.