We had the same situation with our QS8's, so we used toggle bolts for mounting the speakers. Medium to large size, they work great.

I guess I should also say that we used the FMB's to mount the QS8's. So we used two toggle bolts for each speaker mount.

Last edited by hopkinj4; 10/05/05 03:30 PM.
Denon 5803 Denon 3910 Axiom M80ti's, QS8's VP150, EP500's (7.2)