A compact USB-C-powered stereo audio player and amplifier powered by an ESP32-S3 microcontroller.
KINK-box is a dedicated audio playback device with built-in amplification, WiFi connectivity, and a simple web interface. Stream audio to speakers or headphones with intuitive physical and web controls.
- USB-C Power Delivery: Powered by standard USB-C PD adapter (12V negotiated)
- WiFi Connectivity: Built-in 2.4 GHz WiFi for streaming
- Web Interface: Control playback and configuration from any browser
- Stereo Audio Output:
- Speaker terminals for direct loudspeaker connection
- 3.5mm line-level jack for headphones or external amplifiers
- Physical Controls:
- Four RGB-illuminated buttons for quick access
- Additional tactile button and navigation switch for volume and menu control
- Class-D Amplifier: High-efficiency 30W stereo amplifier built-in
- Assembly: Reference the component placement guide and Bill of Materials
- Power On: Connect a USB-C Power Delivery adapter
- Connect: Join the device WiFi network
- Access: Open
http://<device-ip>in your browser - Play: Use the web interface or physical buttons to select and play audio
- Volume: Adjust using physical controls or the web interface
All manufacturing and design files are in kicad-artifacts/:
- Gerbers:
KINK-box_gerbers.zip- For PCB fabrication - Schematics:
KINK-box_schematic.pdf - 3D Model:
KINK-box_board.step - Interactive BOM:
ibom.html
Apache License 2.0 - see LICENSE for details.
KINK-box - Simple stereo audio player with built-in amplification and WiFi.