Hilbert Reflex Speakers

These little bookshelf speakers make use of the popular Dayton Audio PS95 Point Source driver, with a back volume of about 2.5L and port tuned to ~70Hz.

The model is designed to print with the back on the bed and the driver/port openings face up. Print without supports. Extra top and bottom solid layers recommended to fill any gaps from the long bridges (8 each top and bottom solid layers worked well with 0.2mm layer height). Otherwise, print settings and materials are not critical. Some of the interior may get ugly and stringy with so many overhangs and long bridges, but strings don't have any impact on the sound and walls that require large bridges have been made thicker so they can recover and be filled/smoothed with solid top/bottom layers.

Threading speaker wire could be annoying. You could run a lead through the speaker wire hole with a string tied to a paperclip. Use the weight of the paperclip to get the string to come out through the driver opening and then attach that to speaker wire to pull the heavier wire back through. The speaker wire hole should be sealed with hot glue or similar. The hole is small enough that you can easily punch a larger hole in the model to accommodate a binding post plate if you want a cleaner look.

To mount the driver first thread long M4 screws through the mounting holes and use the screws to pull M4 nuts into the hex openings (don't over tighten or you will deform the driver mating surface). The nuts should hold in place when you back out the screws, leaving construction similar to threaded inserts or T-nuts.

Polyfill or similar stuffing is recommended to damp some ripples in the response, but is not required.