I was amazed at how easy it was to build my own Bluetooth speaker using simple materials I already had around the house. With just a bit of technical know-how, you can create your own quality speaker to listen to music and take phone calls for a fraction of the cost of buying one.

What You'll Need

To build your DIY Bluetooth speaker, you'll need just a few cheap, easy-to-find parts:

Speaker Driver

This is the main component that actually produces the sound. You can salvage a small speaker from an old set of computer speakers, radio, or other device. Just make sure it's a powered speaker with a magnet.

Amplifier board

This small circuit board takes the audio signal from your phone and amplifies it to drive the speaker. You can find inexpensive little amp boards on Amazon or eBay for $10-20.


You'll need a portable battery like a phone power bank or a few AA batteries to power the amplifier. Rechargeable batteries work best.


You'll need some basic electrical wires to connect the components. I used leftover speaker wires.


The speaker driver and circuitry will need to go in some type of sealed enclosure to produce good sound. You can upcycle an old mint tin, cardboard box, or other container.

Bluetooth Module

To get wireless Bluetooth capabilities, you can add a small Bluetooth module board, often called a breakout board. These are around $15 on Amazon.

That's it! With just these basic supplies, you can build your own Bluetooth speaker.

Step-by-Step Instructions

Building the speaker is surprisingly straightforward. Here are the step-by-step instructions on how I built mine:

1. Prepare the Speaker Driver

First, I disassembled an old computer speaker and removed the speaker driver. This had the magnet and paper cone needed to produce sound.

I desoldered the original wires and soldered on longer wires so I could connect it to the amplifier board. Soldering is a must for this project.

2. Connect the Amplifier

Next I wired the speaker cables to the amplifier board's output terminals, being sure to match the positive and negative wires.

I soldered the power wires from the amp board to the battery's terminals to connect the power.

3. Add Bluetooth Module

For wireless functionality, I soldered wires from the amp board's input terminals to the Bluetooth module's output pins.

Important: Be sure to pay attention to the input and output pins when connecting components!

4. Install in Enclosure

I mounted the speaker driver and circuit boards using hot glue inside a sturdy cardboard box to act as the enclosure.

The box must be fully sealed for good acoustic performance. I cut a hole just big enough for the speaker driver's magnet and cone.

5. Test and Tune

After sealing up the box, I powered it on and paired my phone using Bluetooth. Success!

To improve the sound, I experimented with different enclosure sizes and port tubes to tune the sound quality. It took some trial and error.

With just these simple steps, I had a handmade Bluetooth speaker that could play loud, high-quality sound for hours on a charge. And it only cost me about $30 to build!

Tips for the Best Sound Quality

Here are some tips I learned for getting the best audio performance from your homemade Bluetooth speaker:

Taking the time to tune your enclosure and components makes a huge difference in sound quality. It's worth the effort!

Fun Variations to Try

Once you grasp the basics, there are all kinds of cool tweaks you can try:

The possibilities are endless if you understand the core speaker building concepts. With a little ingenuity, you can create something amazing!

So if you're looking for a fun electronics project that also leaves you with a useful gadget, building your own Bluetooth speaker is incredibly satisfying. With just a few cheap components and some DIY spirit, you can make a great-sounding speaker that rivals ones costing ten times more in stores. I hope these instructions give you the confidence to try it yourself! Let me know how your build goes.