Vinyl record player MM phono phono board Use the dedicated amplifier chip for vinyl record player, the effect is the amplifier board of NE5532 and other op amps, the circuit design has a frequency compensation circuit, the sound frequency band is more balanced, the input signal filter circuit has a relatively lower noise floor, and it has a rectifier filter voltage regulator circuit. Separate amplifier board (no other accessories) Working voltage: AC: AC dual 10v-17v Note: The ground wire of the vinyl record player should be connected to the GND end of the power input end of the amplifier board. Or connect to the GND ground pad next to the input, otherwise there may be interference. If conditions permit, you can connect to the mains ground for better results. Colour:Black Material:ABS Package Contents: 1x Phono preamplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.