Hello rotarius. I appreciate your suggestions are very relevant so likely you
have some knowledge. Do you have some more specific suggestions? Thanks.
It's hard to be specific because induced vibration and resonances are so dependent on the masses coupled together and the natural frequencies of all the materials of a given system (speaker). At work, I have access to vibration analyzers, so if I had to attempt an experiment like this, I would use some equipment to quantify the results. Like someone suggested earlier, you could use materials that dissipate vibrations in the form of heat on the inside walls without much thought. Just because something you stick on the panel is very rigid, it does not guarantee anything. I mean it will still transmit vibration and it will resonate at some higher frequency. Is that better for your sound?
