Powerful Portable Bluetooth Speaker 2x5W

Bluetooth Speaker

Make your own powerfull Bluetooth Speaker with some extra features, easy explained, cheap and handy to use for less then 15$.

Maybe you have some components which you don't need to buy like 5W speakers and some lithium batteries to make it less expensive like I did.

In the following steps I will try to explain on the easiest way how to assemble this bluetooth speaker, people who don't know a lot of electronics will understand I hope :)

This speaker has a very long battery life when you use good 18650 lithium batteries.

I found 4x 18650 lithium batteries which I used in parallel and has a total of 6000mah, the speaker plays over 24 hours on the highest volume which is very loud.

You can charge the speaker with a micro USB, which is very handy!

I also added a voltmeter display wich I bought on ebay so I will know when the batteries are almost empty.

The last new thing I added to the speaker is the 5V usb out so you can charge your smartphone or other stuff.

In the next video I will show you the finished speaker and play a song to show you.

What do you need?

- Bluetooth audio usb: Ebay

- Micro usb charger module(with protection): Ebay

I bought 2 of these just because they are very usefull.

- 5V usb output: Ebay

- 2x5W amplifier: Ebay

I should really recommand THIS Amplifier, after I building it with the normal one I deccided to add a volume switch because the bluetooth usb has a very loud startup sound!

If you want to add a single speaker you can use a mono amplifier (or buy a 5w mono amplifier)

- 3.7V lithium 18650 battery: NKON

I found my lithium battery in a router/modem, you can easy find them in laptop batteries, the battery of a drill or other electrical stuff. You just need a 3.7V Lithium Battery (You can also buy them on the internet)
I would really recommend to search very good after these because they aren't cheap.

- 3 position switch: Ebay

The one I used did I find from an old toy

- 2 Speakers 5W: Ebay

Again i found mine in some old pc speakers

- Rubber (or passive radiators)

- Wires

- Material to make a box

Put the parts together

Connect the parts with wires which you can see in the picture.

You need to dissasemble the bluetooth usb first and solder it like I showed in the picture.

It doesn't matter or the bluetooth usb gets 5V or 3.7V, it will work both.

Something I forgot to add in the schema is the V-meter display, just connect it to the + and - of the lithium batteries.

I used a 3 position switch, position1 is aux input and position2 is bluetooth mode.

Here are some pictures during the assemblage of the speaker.

I made the box out of wood, this would give you an excellent audio quality.

I didn't bought passive radiators but found some rubber and I tried to make it by myself.

I need to put a grill in front of the speakers, but I like it more without them to make pictures to post :)

If you have any questions, feel free to ask anything!