Powerful underwater speaker

[LEO1982]

I think it's relatively easy to do. If you put a power supply, a vibration speaker of suitable power, and an economical class D amplifier in a reliable sealed case, all you have to do is connect it via a sealed connector to the DRS-100. Perhaps you could then add a volume control.
I assume that there are many similar designs, for example this one: Using a vibration speaker allows you to significantly increase the volume or reduce power consumption, increase battery life.

Great! We have successfully connected the underwater speaker to the DRS-100! This speaker really helped solve a big problem! Next step is to shoot some underwater martial arts style short films in our underwater production center! Thank you again for your solution! Cheers!

Greetings from afar
LEO