Vinyl record player MM MC cartridge phono and playback board: With JRC2150BBE sound effect processing, high and low sound effect, improved clarity, and good dynamic effect. Use the special amplifier chip of vinyl record player, the circuit is designed with frequency compensation circuit, the sound frequency band is more balanced, the input signal filter circuit has relatively lower noise, and the rectifier filter voltage stabilizer circuit is provided. (Note: The chip is polished, and the model is not required). Versions: Amplifying board + power transformer + 2 lotus sockets with 300mm shielded wire Working voltage: AC dual 10-17V Board size: 85mm x 50mm Overall height: about 23mm Colour: as shown Material: PC+metal Package Contents: 1 x Vinyl Record Player Board Kit Note: The ground wire of the vinyl machine should be connected to the GND terminal of the power input end of the amplifier board. Or connect to the GND ground pad next to the phono input. If possible, you can connect it to the mains ground. Ungrounding may cause interference. The quality of the power supply determines the sound effect, and the power supply must be good. It is also possible to add an AC filter to the 220v input terminal for better effect.