Easyspares PAM8403 DC 5V Class D Mini Digital Amplifier Board Module 6W (3 W + 3 W) Sound Recorder and Sound Circuit Electronic Hobby Kit

The PAM8403 is a Class D DC stereo amplifier with an output of 3 W + 3 W at 4 ohms, and a working voltage of 2.5 to 5.5 V. It has a frequency response of 150 Hz – 20 KHz, and an efficiency of 90%. The PAM8403 is small and powerful, and is suitable for custom speaker projects because it doesn't require a heat sink. Here are some features of the PAM8403: Output power: 3 W + 3 W (at 4 ohm) Working voltage: 2.5 to 5.5 V Board size: 24 x 15 mm Input voltage: 2.5-5.5 V (USB power supply) Output impedance: 4 ohm The PAM8403 can drive any speaker, but it won't reach its peak output power with huge speakers. For best results, use 4 ohms, 3 watts speakers. The maximum power / sound output will be obtained when running the module at the higher end of its voltage range like 5V. The PAM8403 is widely used in portable audio devices.