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.
Step 2: Trace the circle
I then put this card onto the face of the Munny and traced out the circle.
Step 3: Heat 'im up!
Cutting is all about careful subtraction. I cut within my safe area quickly, but when I was getting close to my line I started whittling down the space with constant checks with the drivers and eyeballing it from the side to see where I needed to remove more vinyl next.
Step 5: Wire it and fill it
Step 6: Seal it up
Run a bead around the whole driver, tie it up, and let it sit over the weekend.