Bluetooth Speakers Powered by Power Bank

This is a very easy to build, yet powerful boombox. No soldering nor any knowledge of electronics needed.

You can turn your bookshelf speakers into a portable bluetooth boombox for about €30.

I chose to use a power bank as power source because of the USB charging capabilities and because you can easily swap an empty power bank with a full one. One full power bank (10000mAh) lasts 7-12 hours (depends on the volume).

Specs/ Features:
- 2-way bass-reflex speaker system (bookshelf speakers)

- USB charging (pass through power bank)

- TDA7492P 50W+50W Wireless Bluetooth 4.0 Audio Receiver Digital Amplifier Board

I built the box using some scrap wood I had lying around. The handles are made from a leather belt. I think there is not much to describe here as you can design your boombox as you like it.

Parts:

Amplifier:

TDA7492P 50W+50W Wireless Bluetooth 4.0

This is a bluetooth amplifier, which needs a 12V input. As it ships from China delivery times can be very long.

Powerbank:

Xiaomi 10000mAh power bank

I used this power bank, because it's a great bang for buck and due to its pass through charging abilities. This means you can charge your power bank while using your boombox.

5V 12V Converter:

5V USB 12V DC Converter

This is used to convert the 5V output of the power bank into 12V for the amplifier.

Connect the Parts:

It's very simple to connect the parts. Just connect the 5V 12V converter and the bookshelf speakers with the amplifier and it's done. No soldering needed.