Got an old pair of headphones? Time to turn them into speakers! Also, new Audible members get a 30-day free trial. Visit http://audible.com/diyperks or text "diyperks" to 500 500 to try Audible today!
Broken Galaxy Buds (ebay): https://ebay.us/ehwwHX
2" subwoofer and radiator: https://www.soundimports.eu/en/tang-band-pr08-a.html
2" mid/treble unit: https://www.soundimports.eu/en/tectonic-elements-tebm35c10-4.html
Protected batteries: https://uk.rs-online.com/web/p/speciality-size-rechargeable-batteries/8801558/
The guide will be uploaded shortly.