Compact 5V stereo amplifier board based on the PAM8403 audio amplifier IC. Delivers up to 3W per channel into 4 ohm speakers, includes an onboard volume control, and is powered by a standard 5V USB supply for simple plug and play use. Key benefits - Easy setup and power: Runs from any 5V USB power source such as a USB adapter or power bank, eliminating the need for a separate amplifier power supply. - Clean small-room audio: 3W per channel output provides clear, audible sound for desktop, kitchen, workshop, or bedside applications. - Simple integration: Onboard volume control and line level stereo input make the board suitable for quick retrofit projects and DIY enclosures. - Compact and lightweight: Small PCB format fits inside tight enclosures or behind monitors without adding bulk. Core features and specifications - Model: PAM8403 amplifier IC on a stereo amplifier board. - Power supply: 5V DC via USB. - Output: 2 channels, 3W per channel into 4 ohm speakers under typical conditions. - Inputs: Line level stereo input. - Controls: Onboard volume control for quick level adjustment. - Speaker compatibility: Suitable for passive speakers in the typical 4 ohm to 8 ohm range. - Construction: Printed circuit board with standard through hole and surface mount components for reliable connections. Practical applications - Desktop speaker upgrade: Power small bookshelf or monitor speakers from a USB port for improved audio from a computer or media player. - DIY Bluetooth or MP3 speaker projects: Use the board as the amplifier stage in battery powered or USB powered portable speakers. - Portable event audio: Provide simple, USB powered audio amplification for presentations, workshops, or hobby demos using a power bank. What makes this module stand out - Ready to use with USB power: No special power supply required, enabling mobile and low complexity setups. - Onboard volume control avoids the