Features 1、Digital amplifier board adopts special inductance for audio to keep clear and powerful sound. 2、The resistor uses high‑accurancy chip resistors enables to keep a good signal‑to‑noise ratio. 3、Adopts imported TPA3255 chip, AMP board's quality is guaranteed, you can use it with confidence. 4、Supports class D working method, digital amplifier board installation is simple. 5、Practical adoptability keeps its high performance for a long time, which makes amplifier board with wide application. Specification Item Type: Digital amplifier board Working Method: Class D Quiescent Current: 150mA Work Efficiency: .>90% Output Power: 315W/4Ω, distortion 10% x 4 185W/8Ω, distortion 10% x 4 260W/4Ω, distortion 1% x 4 150W/8Ω, distortion 1% x 4 Frequency Response: 20Hz to 20KHz Dynamic Range: >100 dB Signal to Noise Ratio: > 111dB Working Voltage: DC24-48V switching power supply (DC) (It is recommended to use DC36V switching power supply. If use the DC48V power amplifier board, temperature of the radiator will be higher, the fan needs to be added for cooling.) Package List 1 x Digital Amplifier Board