Breadboard Speaker Amplifier

This speaker holder / resonator / amplifier fits into the dovetails on a [standard breadboard](http://a.co/3fFSKdj). It holds either a [40mm](http://a.co/0Du9G7Y) or a [50mm](http://a.co/hgViS8L) speaker. Use it with your favorite prototype circuit, such as an [Atari punk console](https://en.wikipedia.org/wiki/Atari_Punk_Console).
The small tab fits into the slot with a friction fit, holding the speaker in place. Also see my [breadboard battery box](https://www.thingiverse.com/thing:2822896).