Description This super small mono amplifier is surprisingly powerful able to deliver up to 2 5 Watts into 4 8 ohm impedance speakers Inside the miniature chip is a class D controller able to run from 2 0V 5 5VDC Since the amp is a class D its very efficient over 90 efficient when driving an 8 speaker at over half a Watt making it perfect for portable and battery powered projects It has built in thermal and over current protection but we could barely tell it got hot Theres even a volume trim pot so you can adjust the volume on the board down from the default 24dB gain This board is a welcome upgrade to basic LM386 amps CJMCUThe A and A inputs of the amplifier go through 1 0uF capacitors so they are fully differential if you dont have differential outputs simply tie the Audio pinto ground The output is Bridge Tied that means the output pins connect directly to the speaker pins no connection to ground The output is a high frequency 250KHz square wave PWM that is then averaged out by the speaker coil the high frequencies are not heard All the above means that you cant connect the output into another amplifier it should drive the speakers directly CJMCUComes with a fully assembled and tested board We also include header to plug it into a breadboard and a 3 5mm screw terminal blocks so you can easily attach detach your speaker You will be ready to rock in 15 minutes Features Output Power 2 5W at 4 10 THD 1 5W at 8 10 THD with 5 5V Supply