3D Printing Nerd Builds a Fully Functional Bluetooth Speaker

The Build

The FDMDuo is not a typical desktop speaker. It uses two 4-inch woofers and a dome tweeter in a cabinet you print yourself. Deposition Sound sells the driver kit with crossover and Bluetooth module pre-configured. You provide the PLA or PETG.

The 3D Printing Nerd video walks through the entire assembly: glue the woofers into the printed chambers, wire the crossover, drop in the Bluetooth board, and seal it up. The result is a compact stereo speaker that pairs with any phone or laptop.

Why 3D Print It?

Most Bluetooth speakers at this size cost $50 to $100 and are not serviceable. The FDMDuo kit costs less in drivers alone, and you get to choose the filament color and cabinet finish. If a driver blows, you replace it. If the case cracks, you reprint it.

The build also lets you experiment with internal bracing and port tuning. Deposition Sound provides the standard design, but the community has already published modified enclosures on Printables and Thingiverse.

Who Is This For?

This is not a beginner first print. The speaker needs decent dimensional accuracy, especially around the driver cutouts and port tubes. A well-calibrated printer with a 0.4 mm nozzle works. PETG handles the vibrations better than PLA.

If you have done a few functional prints and want something that plays music, this is a solid weekend project. The kit includes everything except the filament and the printed parts themselves.