How to Make DIY Wireless Multi-Room Audio System

This DIY wireless multi-room audio system operates by taking an audio signal from a primary source, such as a phone or laptop, and broadcasting it across multiple remote outputs simultaneously using dedicated Bluetooth transceiver components. At the heart of the transmission side are KCX BT Emitter chips, which take the incoming audio stream and encode it for wireless transmission. On the receiving end, KCX BT003 chips paired with standard Bluetooth speakers capture the transmitted wireless signal, decode the digital or analog audio data back into usable waveforms, and drive the local speaker drivers. The entire system relies on stable power supply components to deliver clean, regulated DC voltage to both the emitter and receiver boards. By carefully integrating these discrete chips with custom PCB materials and appropriate decoupling components, the system achieves synchronized audio distribution without requiring expensive commercial network streaming hardware.