I was browsing some new pics of King's X in the studio. and the drums have a speaker attached to the front head of the kick. I know a speaker can function as a crude mic, but what do you do with that signal?
I used a Yamaha NS-10 speaker wired to function as a microphone on a kick drum a year or two ago. It worked great in combination with a mic inside the drum.
What is the most insane recording mechanism you guys have heard of? I think it's pretty wild to hear about people recording with Bass cabs as microphones.