The board adopts the typical PBTL circuit of TPA3110. It uses a single power supply with anti-reverse connection. It is very convenient to use a universal adapter and switching power supply for its power supply. Most of the resistance container parts adopt standardized patch technology, which is simple and stable. Design a special interface for the Blue-tooth audio receiver module, built-in 5V voltage regulator circuit, you can easily DIY Blue-tooth speakers.
The board can be connected to 8 ohm, 4 ohm speakers.