Here is a demo video showing the #USB2Speakon in use.
I'm not sure if the camera microphone captures it accurately, but it's surprisingly loud :D
(I expected around "room volume" at most)
insert standard run-of-the-mill #PCB assembly steps here
Paste, place, reflow the one side.
Solder the other side by hand (because I didn't have a hot-air station at home and was impatient).