1. Adopt original TPA3255 chip 2. The electrolytic capacitor adopts a capacity of 470UF / 50V x 4, which ensures a strong source of continuous . 3. The resistor uses high-precision chip resistors to a good signal-to-noise ratio. 4. Adopt special inductance for audio to the sound is crisp and powerful. 5.PCB adopts 1.6mm thick double-sided board, 2.0 ounce copper thickness, and full tin-spraying process to good passing performance of large and small currents. First-class PCB quality. Descriptions: TPA3255 Four-channel digital Class D amplifier board TPA3255 is a high-performance Class D power amplifier, which has Class D efficiency and can bring true high-end sound quality. There is an advanced integrated feedback design and a proprietary high-speed gate driver error correction function. This technology allows the device to maintain ultra-low distortion throughout the entire audio frequency band while exhibiting perfect sound quality. Basic performance parameters: 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: (SNR) 111dB Working voltage: DC24-48V switching power supply (DC) (It is recommended to use DC36V switching power supply. If the temperature of the radiator of the power amplifier board with DC48V power supply be higher, you need to increase the fan cooling) Material:ABS colour:As Shown Package Contents: 1 Amplifier Only the above package content, other products are not included. Note: Light 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.