1. TPA3255 is a high-performance class D power amplifier chip, which has class D efficiency and can bring real high-end sound quality circuits. 2. The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath Ultra HD). 3. This technology enables the device to maintain ultra-low distortion in the entire audio frequency band while displaying sound quality. 4. The device operates in AD mode. When the is 1.5%, it can drive up to two 315W/4R loads and two 150W (unshipped power)/8R loads, and has a 2 VRMS analog input interface, which supports seamless connection with high-performance (such as the PCM5242 of TI). In addition to excellent audio performance, the TPA3255 has two advantages: high power efficiency and ultra-low idle power loss (less than 2.5W). 5. This can be achieved through 85mR MOSFET and optimized gate driver scheme. Compared with the traditional discrete implementation scheme, this scheme can significantly reduce the idle loss. Product name: Digital power amplifier board Power amplifier IC: TPA3255 chip Input mode: 3.5MM stereo wired socket interface (3P) Work efficiency: 90%. Output power: 315W/4 ohm, 1.5% distortion, 185W/8 ohm, 1.5% distortion, 260W/4 ohm, 1% distortion, 150W/8 ohm, 1% distortion. Frequency response: 20Hz to 20KHz Dynamic range: 100 dB Signal to noise ratio: (SNR) 111dB Power supply: DC19 to DC48V [recommended current above 5A] Size: 110X70X30mm Colour: black Material: PCB+Metal Package Contents: 2 x Digital power amplifier board 2 x Cable 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.