Quarter Wavelength Bluetooth Speaker

prusaprinters

<p>This is a stereo Quarter-Wave Speaker I designed in fusion 360. I am listing the speakers I used (bought in bulk at $0.48 each) and the Bluetooth amplifier I used ($13). For very old CRT tv speakers, this little thing puts out quite a bit of volume and the bass is actually pretty good. While my calculations of the wavelength are fine, the pathway might not be 100% optimal, but its very close.</p><p>Printed at 0.32 layer height for most parts, but the speaker cover/grill is 0.08 layer height. Everything is in Blue PLA and fits fairly well. I used hot glue to hold the side panels on (and to make it more air-tight). - I probably could have used some small magnets to make the panel removable to show the innards, but I did not have any on hand and wanted to finalize the project to demonstrate for my class.</p><p>Below are the parts that I purchased (Speaker was $0.48 in bulk). &nbsp;The bluetooth amplifier was $13.99. &nbsp;The amplifier comes with a barrel power connector - and I used it to hook up to a ryobi 18v battery for portability - but I also grabbed an AC adapter for classroom discussion and use ($13.99).</p><p><a href="https://www.parts-express.com/YDT613-68-2-1-4-x-5-Paper-Cone-Full-Range-Speaker-8-Ohm-77-289-2314">https://www.parts-express.com/YDT613-68-2-1-4-x-5-Paper-Cone-Full-Range-Speaker-8-Ohm-77-289-2314</a></p><p><a href="https://www.amazon.com/dp/B08Z3FBSDT/?coliid=I3ECBFZDC6LIL&amp;colid=3OKL3BQJ2POP2&amp;psc=1&amp;ref_=lv_ov_lig_dp_it">https://www.amazon.com/dp/B08Z3FBSDT/?coliid=I3ECBFZDC6LIL&amp;colid=3OKL3BQJ2POP2&amp;psc=1&amp;ref_=lv_ov_lig_dp_it</a></p><p><a href="https://www.amazon.com/dp/B0711Q5B49/?coliid=IVOV6EAHETSYW&amp;colid=3OKL3BQJ2POP2&amp;psc=1&amp;ref_=lv_ov_lig_dp_it">https://www.amazon.com/dp/B0711Q5B49/?coliid=IVOV6EAHETSYW&amp;colid=3OKL3BQJ2POP2&amp;psc=1&amp;ref_=lv_ov_lig_dp_it</a></p><p>&nbsp;</p>