High efficiency with original Philips TDA7492 Siemens capacitive coupling capacitors imported 0.47UF, main filter electrolytic Yung Philips brand, capacity 2200UF / 25VUF * 2, ensure strong The steady flow of power support. Resistor selection of rings metal resistance, the main circuit employs a precision of ± 1% rings Metal film resistors, ensure the machine a good signal to noise ratio. 1.6mm thick sheet using double-sided PCB, 2.0 oz copper thickness, HASL whole process to ensure that the size of the current through the good performance. PCB-class quality. The basic performance parameters: Work: Class D Quiescent Current: 20mA Efficiency: 90% Rated Output Power: 2 * 50W or BTL 1*100W MAX Frequency response: 20Hz to 20KHz Working voltage: DC18V to DC24V Recommended supply voltage: DC24V Maximum output current: 3A