AFAIK, they need more than one. All of those mics are between $400-500. Currently, their wireless mic gets a fair amount of interference (I'm not sure what kind it is), and it's on the same frequency as the one Jazzersize uses. Which could pose a little bit of a problem... There's also a cell tower right on top of the church (literally). And it's in Long Beach, California, near the port. So um, yeah, lots of interference.

I am the Doctor, and THIS... is my SPOON!