Labyrinth Horn Speaker

thingiverse

A popular "Bluetooth back horn speaker" inspired remake. #Improvements I did some improvements from the original one. **Speakers** * **Tweeter**. You can't achieve good sound from the one loudspeaker, even if it broadband. Just split it into two bands, lower for the woofer and higher for the tweeter. * **Passive radiator**, which increases your woofer efficiency and helps it to play the very low frequencies. **Electronics** * **Touch buttons** to control the volume. * **Connectors plate** on the backplate for the power plug, audio connectors, and so on. **Mechanics** * **M8 rod tunnel** at the bottom to increase weight and stability. * **Labyrinth's walls** can be not so thick as in the original. Better to make it thinner and more soft/viscous inside to prevent a ringing. * **Woofer mount** has been ruggedized to ensure it is mounted reliably and will not break under its weight. **Sound design** * **Fillets** added to every corner. * **No parallel walls** to prevent reflection of the sound wave and make a standing wave inside the speaker box impossible. In the other words, all flat surfaces are made to reflect the wavefront outside: they're rotated from the normal position. * **Labyrinth's length** fitted to 600 mm (142 Hz resonant frequency as of my woofer). 50x15x90 box for electronics such as an amplifier/BT receiver/PSU located inside on top of the speaker, corners smoothed too. Maybe you want to place any voice assistant module here? :) You can add microphone holes at the top. I avoided any thick walls and joints, used every mm3 to conduct the sound or as sound conductive surface support. Tweeter and passive radiators glued using B-7000 glue, orange side plates too. #BOM **Woofer**: 85mm mounting circle dia, 70mm diffusor dia, 46mm depth. 95mm OD, 47mm height. 70Hz–12kHz. **Tweeter**: 30mm mounting hole. 36mm OD, 8mm height, 1.5kHz–20kHz. **Passive radiator**: 86x86x4.5mm, 44g weight. All of these transducers are from my consumer electronics teardown, I hope you can find the suitable ones, but if not, please leave a comment, maybe I can adjust my model to fit the most popular ones.