It is now a newly revised product in May 2024. It works completely normally at 52V, and the materials used are more advanced. It can perfectly drive 4-8 ohm speakers! The output power is increased by more than 50% under the same power supply. TPA3255 is a high-performance Class D power amplifier chip with Class D efficiency and a circuit that can bring true high-end sound quality. The device features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath Ultra HD). This technology allows the device to maintain ultra-low distortion across the entire audio frequency band while demonstrating sound quality. The device operates in AD mode and can drive up to 2 315W/4R loads and 2 150W (unclipped power)/BR loads at a of 1.5%, and has a unique 2 VRMS analog input interface to support high-performance (such as TI's PCM5242) seamless connection. the TPA3255 combines high power efficiency with ultra-low power level idle losses (less than 2.5W) two major advantages. This is achieved with 85mR MOSFETs and an optimized gate driver scheme. This solution can significantly reduce idle losses compared to traditional discrete implementations. Frequency response: 20Hz to 20KH Dynamic range: 100dB : 111dB Work efficiency: 90% Output power: 315W/4Q distortion 1.5% 185W/8Q distortion 1.5% 260W/4Q distortion 1% 150W/8Q distortion 1% Colour:Black Material:ABS Size:122.5X73.5X24.0MM Package Contents: 1 x Digital amplifier board 1 x Wire(Wire styles are sent randomly,don't accept the specified) 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.