52V is working perfectly. The materials used have also become more expensive, and it can perfectly drive 4-8 Euro speakers! Under the same power supply, the output power can be increased by more than 50%. TPA3255 is a high-performance Class D power amplifier chip, which has Class D efficiency and can bring true high-end sound quality circuits. This device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath) Ultra high definition. This technology enables the device to maintain ultra-low distortion throughout the entire audio frequency band while showcasing sound quality. This device operates in AD mode and can drive up to 2 315W/4R loads and 2 150W (unshipped power)/8R loads at a of 1.5%. It also has a unique 2 VRMS analog input interface and supports seamless connection with high-performance DACs (such as TI's PCM5242). In addition to excellent audio performance, TPA3255 also has two major advantages: high power efficiency and ultra-low power level idle loss (less than 2.5W). This can be achieved through an 85mR MOSFET and an optimized gate driver scheme. This scheme can significantly reduce idle loss compared to traditional discrete implementation schemes. Frequency response: 20Hz to 20KHz Dynamic range: 100dB : 111dB work efficiency: 90% Output power: 315W/4Q distortion of 1.5% 185W/8Q distortion of 1.5% 260W/4Q distortion 1% 150W/8Q distortion of 1% Colour:Black Material:PCB+Metal Package Contents: 1 * HIFI Digital 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.