All parts of this product are for original, and of pure quality. Using high-quality for original parts not only guarantees safety and quality, but also has a long service life. More importantly, it is a strong that the actual performance can meet the design goals. Adopt for original TPA3255DDVR. The electrolytic capacitor adopts famous capacity 470UF/50Vx8, ensuring strong and continuous . The resistor uses high- chip resistors to a good signal-to-noise ratio of the whole machine. Uses a special magnetic ring inductor for audio to crisp and powerful sound. PCB uses 1.6mm thick double-sided sheets, 2.0 oz copper thickness, and full tin spraying process to good passing performance of large and small currents. Top- PCB quality. Working method:Class D Quiescent current:300mA Work efficiency: 90% Output Power:450W/3ohm, distortion 10%, 600W Frequency response:20Hz to 20KHz Dynamic range: 100 dB Signal-to-noise ratio:(SNR) 111dB Working voltage:DC24-48V switching power supply (DC) PCB size:110x102MM Color:As Shown Material:ABS Package Contents: 1 * Audio 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.