20pcs XY-SP5W 5128 Mini Class D Digital Amplifier Board 5W Mono Audio Power Amplifier

Features: Operating current: >1A Power Output: 3~5W Drive Speaker: 4~8 SNR: 85dB@ VDD=5V,Vorms=1V Class D Audio Amplifier Low Distortion, Low Noise Floor Notes: 1.2.5V to 5.5V operation from a single supply ,and damaged upper 5.5V. 2.A 5V/1A DC adapter is recommended to supply the module. 3.The circuit will be damaged if the power polarity is oppsite. 4.4 3W Speaker is recommended 5.With mute fuction, Mute by high level on MUTE PIN and play by low level, Low level is default by a pull-down resister. 6.The module is effective for 0.5V to1V audio signal ,;a pre- Amplifier will be needed, if the signal is small. Package Included: 20 x 5128 Mini Class D Digital Amplifier Module