How to Build a Smart Bluetooth Audio Adapter With AC6951C Module: Teardown, Customization, and Hacking Potential

Tired of wires? Want to make your old speakers wireless? Or send TV audio to Bluetooth headphones? In this step-by-step guide, I’ll show you how to build a universal Bluetooth audio adapter using the AC6951C module. This project requires no coding—just basic wiring and assembly. Let’s get started!

AC6951C module ×1

3.5mm headphones ×1

5V power supply or battery ×1

Optional: USB drive or TF card for music playback ×1

1. RX Mode: Receive audio from phone → output to speakers
2. TX Mode: Take audio from TV → transmit to Bluetooth headphones

Phone → (Bluetooth) → AC6951C (RX) → (AUX) → Speaker

TV → (RCA) → AC6951C (TX) → (Bluetooth) → Headphones

1. Connect 5V power to Type-C port
2. Long-press the M button to turn on

1. In RX mode: Phone searches for "RT06"
2. In TX mode: Put headphones in pairing mode → auto-connect

1. Insert USB drive or TF card → auto-play
2. Double-click M button to switch modes

1. 3D print or use a project box
2. Cut holes for ports and display

1. Play music from phone, TV, or USB
2. Use buttons to control volume and tracks

You’ve just built a powerful Bluetooth audio adapter that supports multiple sources and high-quality audio. Use it in your car, living room, or workshop—anywhere you need wireless freedom!