Now, I'm not the first person to think of this. I've seen at least three different versions of a Munny with a speaker in its head. Still, the only one I've seen in person was just one doll for mono sound and the driver was pretty worthless. I wanted mine to sound at least decent and I'd say I surpassed that.
Step 1: Get a Pair of Munnys and Drivers
Each Munny comes with a few random accessories. A big pencil, a cape, goggles, all sorts of stuff.
The drivers are Tang Band 3" Bamboo Cone Drivers and have an extended range of 105-20,000 Hz.