Now it is the latest version, which completely improves the common problem of high-voltage protection. It is completely normal to use 50V, and the materials used are also more heated. The auxiliary power supply uses a Class A linear power supply, which is more dynamic and significantly improves the sound quality! It can perfectly drive 2-16 ohm speakers! TPA3255 is a high-performance Class D amplifier chip with Class D efficiency, which can bring a true high-end sound quality circuit. In addition to excellent audio performance, TPA3255 also has two major advantages: high power efficiency and ultra-low power consumption level idle loss (less than 2.5W). This can be achieved with 85mR MOSFET and optimized gate driver solution. Compared with traditional discrete implementation solutions, this solution can significantly reduce idle loss. Amplifier IC:TPA3255 chip Input method:3.5M stereo wired socket interface (3P) Work efficiency: 90% The upgrade board has Bluetooth 5.1 input method Output power:315W/4 ohms, distortion 1.5% 185W/8 ohms, distortion 1.5%, 260W/4 ohms, distortion 19%, 150W/8 ohms, distortion 19% Frequency response:20Hz to 20KHz Dynamic range: 100dB Signal-to-noise ratio (): 111db Colour:Black Material:Plastic Package Contents: 1 * 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.