By Graham Smith March 1, 2024
The Plan
Originally intended to build a stereo pair using a pair of earbuds that broke as Bluetooth receivers. After pricing out the speaker drivers, I scaled back to a single mono speaker.
Components
The speaker uses a micro subwoofer (one of the smallest available), two broader frequency drivers, a passive radiator, a tunable 2.1 channel amp board, and a rechargeable battery. The enclosure needed enough internal volume for the passive radiator to function correctly.
Enclosure Design
Designed a bracket that all components mount to, plus an outer enclosure that holds the bracket and provides cutouts for switches, power input, and aux.
Printing Challenges
My resin printer was struggling with larger prints at the time. Had to split the enclosure into two halves, and even then the quality was rough.
Used metal mesh sheet for the front and back panels to shield the components while letting sound and air pass through.
Result
Surprisingly good sound once it was tuned!
