TPA3255 is a high-performance D power amplifier chip, which has D efficiency and can bring real high-end sound circuits.Transparent sound, fast low-frequency response, strong mid frequency texture, high frequency smoothness, and minimal loss. NE5532 chip can effectively reduce distortion and improve audio quality and restoration. Filter circuit composed of high-quality inductors and correction capacitors ensures clear and stable power output and provides the best listening experience. Combination of large heat sink and high temperature fan enables the amplifier to maintain good heat dissipation performance under continuous high power output.Solved the heat dissipation problem. : 92dB Input mode:AUX Channels:2.0 Channel Amplifier Chip:TPA3255 (Original-Chip) Adapter Horn:4-8 Output Power:300W*2 Protection mechanism:Input undervoltage, overheating, overcurrent, short circuit protection. Working voltage range:24-54VDC,It is recommended to use a DC power supply with a voltage of 48V-54V and a current of 10A or above. Note:Due to different production batches, there are batch differences in printed words. Colour:Black Material:ABS Package Contents: 1 * Digital power amplifier 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.