Kangnice TDA7377 Power Amplifier 2.1 DIY kit 3 Channel Sound Audio AMP Board 12-18V DC

The main channel 10W + 10W 3-5 4-8 Euro 10-30W inch full-range or high bass speakers.
Heavy bass 20W 4-6 inch 4-8 European 10-40W subwoofer.
Recommended transformer voltage DC 12-18V, the battery can also be Oh, positive and negative automatic identification, do not worry reversed.
Many of our family router power idle most of them can be used, the current size of the power output, 1A is the most basic requirement, 2A or more on relatively good.
Casual use of other power supply specifications may cause burn!