KT-200BT Dual Channel 2x20W Stereo Amplifier Board | 3.7-5V Rechargeable DIY Desktop Speaker Kit
The KT-200BT Dual Channel Stereo Amplifier Board is a compact, high-efficiency DIY audio solution designed for portable and desktop speaker projects. Powered by a D-Class amplifier chip, it delivers 20W x 2 (L+R) peak power with minimal distortion, supporting 4-8Ω speakers for balanced stereo sound. Operating on a DC3.7-5V input, it seamlessly integrates with rechargeable lithium batteries (e.g., 18650 cells) or USB power sources, making it ideal for battery-powered applications. Its ultra-compact design (PCB size: 33×54mm, weight: 25g) allows easy installation in small enclosures, while the 3.5mm audio input ensures effortless connectivity to phones, laptops, or MP3 players.
Perfect for DIY desktop speakers, it enhances workspace audio with clear, powerful sound. For portable devices, it enables outdoor speaker builds using lightweight, rechargeable power. Hobbyists can also use it to upgrade smart speakers with stronger output or prototype innovative audio projects with its plug-and-play simplicity. Combining affordability, portability, and high performance, the KT-200BT is a versatile choice for audiophiles and makers alike.
