Concrete Bluetooth Stereo Speaker V2

Three months later I made a Bluetooth speaker, mini, sealed wood box, and not stereo, so I want to make the new version more powerful and stereo with passive radiators.

I made a stereo Bluetooth speaker with a new sealed enclosure design made from concrete with passive radiators.

You can see the sound test video and the full instruction in the YouTube video on my channel, If you liked this video, make sure to subscribe for more!

Thanks

This Concrete Bluetooth Stereo Speaker is easy for everyone to make at home with simple materials, you need:

• Solder iron
• Hot glue
• Cement
• Foam
• Foam cutter
• CNC or hand saw
• Sandpaper
• Wires

For this project, you need some materials:

• 3W 4Ohm Speaker X2
• 18650 Battery X4
• Mobile power bank module
• Stereo Bluetooth speaker amplifier MX-MX8
• Capacitor 2200uf 35v

Here I have a big capacity of battery 4X 2600mAh, so I added a power bank module to benefit from this capacity of the battery.

The MX-MX8 Bluetooth amplifier can handle a 2X 5w speaker, it is a good amplifier, but there is a better one in the market, I can upgrade later because I have a big space in the body.

I added a capacitor to the power capacitors of the amplifier to fill the gap of the drop voltage for better bass and sound.

This step is the most difficult step it takes 2 weeks of working, concrete is a very hard and tough material, so sanding the body and making some holes is very hard, and every time you wash the body with water makes the body stronger. I advise you to make the casting mold very smooth and add the holes from the casting mold to decrease the sanding work later.

I made the casting mold from foam and cut it using my foam cutter machine with helping from the wood pieces to make the track straight.

I made the design using AutoCAD and 3D MAX and cut the MDF wood using my router CNC. then glue the wood on the foam to make the cutting easier and straight.

Here I connect the batteries together in parallel and cover them with hot shrink, then make the power bank module ready to add to the body, I desolder all the USB ports on the board and the screen and replaced them with flat wires to reach the new ports in the body.

In the last step, here I added the passive radiators and glue them with the body, and fix the power bank module, the amplifier, and the battery. I glued the speakers to the wood using b7000 glue, and fix the speaker's wood with screws, and added sponge tape before the wood to make the box sealed very well.

As you see, it looks amazing with excellent sound full of bass depending on the sealed concrete box and passive radiators.

Finally, I have great results and a very unique speaker, you can see the sound test video and the full instruction in the YouTube video on my channel, If you liked this video, make sure to subscribe for more!

Thanks,