Bluetooth 5.4 Mono Amplifier Board for DIY Speakers

Add Bluetooth and AUX playback to a DIY speaker with this mono amplifier board. A working build also needs a suitable speaker, power source and wiring.

Wireless control for custom speakers made simple

• ✅ Play from your phone without an audio lead — Bluetooth reception brings wireless audio into your DIY speaker build.
• ✅ Connect a wired source when needed — The AUX socket accepts a compatible audio cable as an alternative input.
• ✅ Build separate left and right speakers — TWS pairs two matching boards; a single board remains a mono amplifier.
• ✅ Recharge a suitable battery within the build — The USB-C charging port provides a connection for charging the attached compatible battery.

This board is made for people who want to turn a simple enclosure into a working custom speaker without a complicated build. Bluetooth playback keeps the setup wireless, while the 3.5mm AUX jack gives you another way to connect when needed.

The 5W mono amplifier suits small desktop speakers, portable audio builds, and hobby projects where space matters. A blue indicator light and brief chime give you a clear startup check, so setup feels more straightforward.

If you want stereo sound, two boards can link through TWS for left and right channels. That gives you more flexibility when building a larger listening setup from separate parts.

The clean layout and solder points keep wiring organized, and the board works with a 3.7V lithium battery for portable projects. It is a practical choice for upgrades, custom enclosures, and lightweight audio builds that need both wireless convenience and wired backup.

A simple board that keeps your audio build flexible.

Clear connections make wiring faster and less confusing.

Follow the wiring steps and get your project running sooner.

Turn a custom enclosure into a usable speaker setup.

A compact layout that suits small builds and tight spaces.

Link two boards for a more complete stereo setup.

Add wireless flexibility and wired backup to your next DIY speaker build.