XH-A901 preamp tone board is suitable for use with power amplifiers. It can achieve audio amplification and high, medium and low frequency adjustment, giving you a better listening experience. It uses the original dual-core NE5532 chip; the power supply voltage is DC12~24V (Note: When wiring, the positive and negative poles must be distinguished, and the audio input is a 3P audio cable) Color: Random, Not accepted for specification Material: PCB Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Package Contents: 1 x Tone board kit 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.