QSC Speaker Problem...

[Roy Dennis]

Just an idea if you don't mind drilling a hole in your speaker pole.

If you were to screw a # 8 self tapping pan headed screw into the pole just above were the bottom of the speaker would come, you could adjust how tight the speaker fitted by adjusting how tight the screw was inserted into the pole.
If there was enough room between the speaker hole and the pole you could have 2 or 3 screws spaced around the pole.

Another option might work Get a thin rubber O ring, place on the pole then push the speaker over that for a tight fit, you would have to find the best size O ring but these could easily be removed from the poles without leaving a sticky residue.