3D Printed Bluetooth Speaker (USB-C & Passive Radiators)
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Stereo Bluetooth speaker with 2.5" speakers, two passive radiators and an integrated battery USB charged.
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- Printables
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- Portable Devices
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- Commercial Use
I wanted to make a compact bluetooth speaker with a low purchase price for occasional use at work. To make the speaker, I used an electronic board that includes everything you need, so assembly and wiring are very simple. I also used two 2.5" Full Range speakers and two passive diaphragms with a diameter of 62 mm. The board has a Bluetooth 5.0 receiver, a stereo amplifier, a holder for a rechargeable 18560 battery + a charging electronic circuit from USB micro or USB-C (depending on the board variant), two buttons that can be used to switch songs with a short press and control the volume with a long press, and finally the main power switch. As for the control buttons, they may or may not be used, because these functions can be controlled directly from the connected mobile phone. That is why I made two variants of the speaker's back cover. The version without buttons is more advantageous for the sound, because even though the gaps between the cover and the buttons are minimal, they still cause a slight passage of air and the buttons can vibrate slightly, which can affect the sound quality.
The speaker body is printed from PLA+ CF, the back cover is PLA transparent for the visibility of the LEDs on the board, and the seals are made of TPU (the softer the better). The printed parts need to be heat-set threaded inserts.
List of required parts:
1x electronic board + cables for connection speakers (Aliexpress) - PAM8403 Amplifier Board 2*3W 2.0 Channel Stereo Class D Audio Amplifier Bluetooth 5.0 18650 Battery Holder
link2x 2.5" speaker - 63 mm (in my case 5W/4Ohm) (Aliexpress)
link2x Passive radiator 62 mm (Aliexpress)
link27x M3 Heat-Set insert - 3 mm short version
16x M3x10mm flat head screw, hex, black (speakers + side panels)
7x M3x10mm countersunk head screw, hex, black (rear cover)
4x M3x8mm flat head screw (electronic board)
1x M3x16mm countersunk head screw (switch mechanism)
1x M3 self-locking nut (switch mechanism)
1x piece of cotton wool to fill the inside of the speaker for better acoustics