rcam641,

Hey, I have many tasks before I sleep!

Yes, the Full Metal Bracket will support older M3s if you use 3/4-inch wood screws (4) into the rear baffle. Stay a couple of inches away from the binding-post array, because the crossover is behind that on the inside of the speaker.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)