Features: The main filtering electrolytic capacitor adopts a capacity of 8x1800UF/35V. Adopting a 10A or higher rectifier flat bridge to ensure strong and continuous power support. The resistance adopts a five rings metal resistor, and the main circuit adopts a five rings metal film resistor with an accuracy of 1%, ensuring a good signal-to-noise ratio of the entire machine. The PCB is made of 1.6mm thick double-sided sheet metal, with a thickness of 2.0A copper and a full process of tin sprayings to ensure good current flow performances. The output adopts a red rings high current inductor to ensure clear and powerful sound. When using bridging, it can output 4 under an 8ohm load. Specifications: Material:PCB Size:Approx.142mm/5.59''x91mm/3.58''x28mm/1.1'' Working mode: Class D Static current: 65mA Work Efficiency: 90% Rated output power: 2x210W Frequency response: 20Hz to 20kHz Operating voltage: AC18V to AC28V Recommended power supply voltage: AC24V-0-AC24V Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Power Amplifier