DAOKI 10PCS Digital DC 5V Amplifier Board Class D 23W USB Power Mini PAM8403 Audio Module

DAOKI 10PCS Digital DC 5V Amplifier Board Class D 23W USB Power Mini PAM8403 Audio Module

Features:<br />Can use the computer USB port 5V power supply<br />or using a mobile phone charger USB port 5V power supply<br />battery power can also be used<br />high efficiency:90%<br />can provide 3W (left channel) +3 W (right channel) output power in the 4? load and 5V power supply conditions<br />A class, B class amplifier such efficiency is only about 30%<br />D class amplifier is highly respected today<br />D class amplifier efficiency is extremely high, not because of temperature affect the sound quality<br />but do not add heat sink and take less space<br />noise canceling circuit was built in the amplifier board<br />power on / off without pop noise<br />module has a short-circuit current protection and over-temperature protection<br /> <br />Application:<br />LCD TVs, monitors,<br />Laptop<br />Portable Speakers<br />Portable DVD players, game consoles<br />Phone / speakerphone<br /> <br />Specifications:<br />Operating voltage: 2.5V-5.5V<br />Speaker With:4-8ohms recommended:4 ohms<br />Speaker Power :2-8W<br />Size:21 x 18 x 3.4mm(L x W x H)<br />Color:As the pics show<br />Net weight:1g<br /> <br />Package Contents:<br />10 x Amplifier Board<br /> <br />Note:Left and right channel output of the "negative" and can not be together,otherwise it will burn IC, and speaker(load) should be connected before power on.