Beken BK3266 Bluetooth 5.0 Audio Amplifier Board

The Beken BK3266 Bluetooth 5.0 Audio Amplifier Board combines wireless audio reception with a stereo power amplifier for DIY speaker and Bluetooth audio projects. The board is built around the BK3266 Bluetooth audio chip and supports external speakers, control buttons, microphone connections, and UART configuration.

Bluetooth Audio and Speaker Output

The board is designed to receive audio wirelessly from a paired Bluetooth device and play it through connected speakers.

According to the listed specifications, it supports:

• Up to six paired devices
• HFP, A2DP, AVRCP, AVCTP, and AVDTP Bluetooth profiles
• Approximately 10-meter operating range
• 4–8Ω speakers
• 2 × 10W output at 12V/4A
• 2 × 15W output at 16V/4A
• 8–22V DC supply input

Actual amplifier output depends on the supply voltage, speaker impedance, and available power from the supply.

UART Configuration

A useful feature of the BK3266 Bluetooth amplifier board is its UART interface.

Connecting the board through a compatible USB-to-TTL interface allows supported parameters to be configured through serial communication. The supplied description indicates that functions such as Bluetooth naming, password settings, volume, and other controls can be adjusted through the interface.

DIY Audio Applications

The board can be used as the core of several compact audio projects, including:

• DIY Bluetooth speakers
• Stereo wireless speaker systems
• Bluetooth audio conversion projects
• Hands-free calling systems
• Headset or portable audio designs

A complete project still requires suitable speakers, a power supply, controls, and any optional microphone or external audio connections.

BK3266 Bluetooth 5.0 Support

The board is advertised as supporting Bluetooth 5.0, although the original project information notes that detailed public documentation for the BK3266 chip was limited.

Because of this, the presence of Bluetooth 5.0 should not automatically be taken to mean that every optional Bluetooth 5 feature is implemented by the module.

For most DIY audio applications, the more practical considerations are pairing reliability, supported audio profiles, operating range, amplifier output, and compatibility with the connected speakers.

Power and Installation Considerations

The power supply should be selected according to the intended speaker output. Higher amplifier power requires a supply capable of delivering sufficient current without excessive voltage drop.

Speaker impedance should also remain within the specified 4–8Ω range. When building the board into an enclosure, adequate ventilation and secure wiring can help maintain reliable operation.

Final Overview

The Beken BK3266 Bluetooth 5.0 Audio Amplifier Board provides a compact way to add wireless stereo audio, speaker amplification, UART configuration, and hands-free features to DIY electronics projects.

Its combination of Bluetooth audio reception and integrated power amplification makes it particularly useful for custom speakers and other small wireless audio systems.

Read more: AUDIO AMPLIFIER BOARD SUPPORTS BEKEN BK3266 BLUETOOTH 5.0 CHIP