Desktop Obelisk Micro Tower Speaker

thingiverse

*Update 11/24/21: Added stand for 1.5 way configuration* These are sleek desktop satellite speakers, with a 3D printed enclosure. They have a very small foot print, but are tall enough to stand above desk-top clutter. Tectonic BMR drivers give excellent dispersion, and the bass extension is 110Hz. I love the Tectonic BMR drivers, they sound great and I really like the way they look. I had some of these tiny 28mm drivers and wanted to find a design they would excel in. Modeling in WinISD I found they are a perfect match for the Dayton Audio ND65-PR. As built, the measured frequency response matches the model, and I've used a calibrated microphone to generate an optimized equalization curve. I've added a version of the stand with space in the bottom for mounting a 15uF capacitor to making it a 1.5 way system. See diagram and photo above for wiring and explanation. I used these capacitors, others will work provided they are not significantly larger: https://www.amazon.com/dp/B08JQH6G3P **Here's a sound demo running with my P-CUBE subwoofer, listen with headphones:** https://youtu.be/HtjmpNfu1sg The EQ settings used this video here are shown in the images. My subwoofer design is here: https://www.thingiverse.com/thing:4706916 The amplifier used in the demo is here: https://www.thingiverse.com/thing:4761687 **If you like it, please hit like!** **Specifications:** - 110Hz-20kHz Wide Dispersion Design - Twin Tectonic BMR 28mm Active Drivers - Twin Dayton Audio 65mm Passive Radiators - 8 ohm impedance - 40W Peak Power - Dimensions 68mm x 238mm x 51mm - Prints on Ender-3 Size Bed *For a bigger 2-way speaker that doesn't need a subwoofer, check out my LCM: https://www.thingiverse.com/thing:5077425*  Check out my other designs here: https://www.thingiverse.com/thing:3384017  **Components, per Desktop Obelisk speaker:** 2x Tectonic TEBM28C10 BMR 28mm full range driver: https://www.parts-express.com/Tectonic-TEBM28C10-4-A-1-1-8-BMR-Full-Range-Speaker-4-Ohm-297-2172 2x Dayton Audio ND65-PR 2.5″ Passive Radiator: https://www.parts-express.com/Dayton-Audio-ND65-PR-2-1-2-Aluminum-Cone-Passive-Radiator-290-205 ~300g printer filament of your choice Speaker cable that will squeeze through a 5x7mm hole 16x M3 screws for the drivers, 4x M3 screws for the stand Optional, 2x Standard 60mm x 60mm Steel Fan Guard: https://www.parts-express.com/NTE-77-MG60-60mm-Metal-Fan-Guard-250-082 **Enclosure Assembly:** Print with 3 perimeters and 60% infill, lying on its side, per the stl file. Poke out the integrated supports from the cutouts. Fit the stand, if you are going to use it. Run the speaker cable through the guide, seal it with putty or silicone. Fit the active drivers, wiring them in series. Remove the wingnuts AND the threaded washers from the PR’s. Fit the PR’s, making sure the internal cables don’t clash with the threaded rods. The front trim panel can be glued, or just fixed with blue tack, if you want the option of changing colors in the future.