Audio Amplifier Board, PAM8406 Digital Power Amplifier Board 5W plus5W Immersion Gold Stereo Amp 2.0 Dual Channel Mini Class D DC5V Amplify DIY Circuit Module for Bookshelf Floor Speakers with Knob

5W+5W Class D Digital Amplifier Features: Supply voltage: DC 5V (Do not overpressure, overpressure will burn IC) Input method: single-ended Output power: 5W 2? 5V \\ 3W 4? 5V \\ 1.8W 8? 5V Size: 55.12mm*32.26mm Product weight: 25g Process materials: High-grade pure black gold circuit board, imported KEMET audio capacitor, large-capacity filter capacitor per channel. Specially made pure black copper terminal, gold-plated audio input terminal. performance: Efficiency: >90% Total harmonic distortion plus noise: <10% Low quiescent current Noise suppression Protection: power input reverse protection, short circuit, over temperature, over EMI Additional features: External power amplifier type selection function (MODE: high level D, low level AB, factory default high level) Can be externally turned off (SD: chip off when low level, factory default high level) Can be externally muted (MUTE: low level mute, factory default high level)