Audio Amplifier 5W+5W Digital Bluetooth Stereo Amp Board - Compact DIY

In this review the Audio Amplifier 5W+5W Digital Bluetooth Stereo Power Amplifier Board is evaluated for hobbyists and DIY speaker builders who need a compact, flexible amplifier module. The board's single biggest draw is its combination of Bluetooth 5.0 connectivity and a selectable 3.5mm AUX input, which makes it easy to switch between wireless and wired sources; our review found the wireless link stable and the AUX jack automatically disables Bluetooth when a plug is inserted, simplifying setup for a workbench or small enclosure.

Key Features

• Bluetooth 5.0: Provides a stable wireless connection for streaming audio from phones and other Bluetooth sources with lower dropouts than older modules.
• 3.5mm AUX input: Automatically switches to wired input when a plug is detected so you can use the board with non-Bluetooth sources without manual toggles.
• 3POUT terminal: A three-pin output lets you access left, right and ground separately for flexible wiring to external amplifier sections or speaker terminals.
• Wide supply range: Runs on 3.7V to 5V DC so it can be powered from common USB power banks or small battery setups for portable projects.
• True stereo option: Supports a true stereo box configuration when two modules are used together, enabling left and right separation for custom speaker systems.

Who It's For

This board is best for electronics hobbyists, DIY speaker builders, and makers who need a small, easy-to-integrate amplifier with both Bluetooth and AUX options. It is well suited for powering a pair of 4 ohm 5W full-range satellite speakers when run from a suitable 5V supply.

Those seeking high-power hi-fi, multi-channel AV receivers, or a fully enclosed consumer product with advanced DSP should look elsewhere, as this module is focused on basic stereo amplification and integration flexibility rather than high-end features or large power output.

Pros & Cons

Pros

• Bluetooth 5.0 gives a reliably stable wireless link for everyday listening and DIY projects.
• The 3.5mm AUX jack auto-detects wired input, making wired playback immediate and foolproof.
• Compact 3POUT wiring lets builders route left, right and ground cleanly for custom enclosures.
• Runs from common 3.7V to 5V supplies so it integrates easily with USB power or small battery packs.

Cons

• Output is limited to 5W+5W per channel, so it is not suitable for users who need high-volume or large-room sound.
• True stereo requires two modules and extra wiring, which adds cost and complexity for a stereo box setup.

Specifications

Output power	5W + 5W
Bluetooth	Bluetooth 5.0
Inputs	3.5mm AUX (auto-detect)
Output terminals	3POUT (L, R, ground)
Supply voltage	3.7V to 5V DC (max 5V)
Recommended speakers	4 ohm, 5W full-range satellites

Our Verdict

The Audio Amplifier 5W+5W Digital Bluetooth Stereo Amp Board is a practical, compact choice for DIY speaker projects and simple stereo builds because it pairs stable Bluetooth 5.0 streaming with an auto-switching AUX jack and flexible 3POUT wiring. It offers good value for hobbyists who need reliable wireless audio and easy integration, but it is not intended for high-power or professional hi-fi use.

Frequently Asked Questions

Can this board be powered from a 5V USB power bank?
Yes, the module runs up to 5V DC and will operate from a 5V USB power bank as long as the supply can provide sufficient current.

Do I get true stereo with one module?
One module provides stereo functionality, but a true stereo box configuration where each enclosure is strictly left or right requires two modules connected in the true stereo mode.

What speakers should I use?
Use 4 ohm, 5W full-range satellite speakers for best results at the rated 5W+5W output from a 5V supply.