A Study of DMLs as a Full Range Speaker

Maybe if you stand in front of a mirror and ask again politely, he'll tell you 😁😁

If he does, then of course you'll have to share the details with us .👍😊
He was actually correct once, when he said that mounting a plate to a good damping material around the perimeter was a good idea. But since then I have seen no indication that he knows anything worth knowing. Why people keep thinking he does is beyond me.
Eric