Need something like this but for audio. This one only goes up to the 52nd, 60Hz harmonic. 100 grand but it's amazing. Trevor, you should move into electrical substation equipment testing so you can play with stuff like this. smile

https://www.omicronenergy.com/en/products/cmc-256plus/

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated