Just something random I put together lol. It has a total of 4 - 1.5" diameter, 3/8" thick neo magnets. 2 on the outside and 2 in the center of the coil. lordofbass soft parts from ebay and 3d printed the basket.

Only 1 coil (dual 4 ohms) hooked up in the video. It moves a bit more with both coils hooked up.

It's not efficient at all and cooling sucks, but it was for fun :) Maybe I'll make another one taking what I've learned.