Description: Original TDA8954TH chip.Main filter electrolytic capacitor with a total capacity of 6600UF. Using two 8A flat bridge, to ensure a steady stream of power support. High precision resistance selection chip, to ensure a good signal to noise ratio of the machine. PCB adopts 1.6mm thick double-sided plate, 2.0 oz copper thickness, tin-plated, to ensure the size of the current good through the performance. Red output current inductance, crisp and powerful sound. When using a BTL bridge, it can output 420W at 8 ohm load. Specification: Work: Class D Quiescent current: 65mA Work efficiency: 90% rated Output power: 420W+420W Frequency response: 20Hz to 20KHz Operating voltage: AC12.5V to AC28V Recommended power supply voltage: AC24V-0-AC24V PCB size: 117x117x30mm/4.61x4.61x1.18 inch Package Includes: 1 Piece High Power for Amplifier Board