Features: The 52V is working perfectly. The materials used have also become expensive, and it can perfectly drive 4-8Ω speakers. Under the same power supply, the output power can be increased by more than 50%. TPA3255 is a high-performances Class D power Amplifiers chip, which have Class D efficiency and can bring true high-end sound quality circuits. This device features advanced integrated feedback design and proprietary gate driver error correction function. This technology enables the device to maintain throughout the entire Sound frequency band while showcasing sound quality. This device operates in AD and can drive up to 2 315W/4R loads and 2 150W (unshipped power)/8R loads at of 1.5%. It also have a unique input interfaces and supports connection with high-performances (such as TI's PCM5242). In addition to excellent Sound performances, TPA3255 also have two majors advantages: low power idle loss (less than 2.5W). This can be achieved through 85mR MOSFET and optimized gate driver scheme. Specifications: Size:Approx.122.5x73.5mm/4.82x2.89inch Package Includes: 1 Set Digital Amplifiers Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.