Yamaha did something with this back in the day, too.
Long thread at DIYaudio on exciter-driven panels:
Long thread at DIYaudio on exciter-driven panels:
A Study of DMLs as a Full Range Speaker
Edit Nov 5, 2022: nice analysis and summary of DML materials and response with python script by @homeswinghome https://www.diyaudio.com/community/threads/a-study-of-dmls-as-a-full-range-speaker.272576/post-7159983 Edit oct 27, 2021: a nice Google drive library of DML publications by vdljev...
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