Step 2: Build the voice coil
1. Cut (2) 11" strips of paper about 1/2 wider than your neodymium magnet is tall. A cutting board works best. Wrap one piece of paper around the magnet and secure it with tape.
TIP: Be sure you don't tape the paper to the magnet. Only to itself.
Then wrap the other piece around the first and secure it with tape.
TIP: Be sure you don't tape the second band to the first, only to itself to secure it.