Power amplifier chip with more than 90/ of the power efficiency and low idle loss characteristics. High-level modulation system configuration, advanced level reduces the number of components, integrated self-protection circuit, including overvoltage, undervoltage, overheating, DC detection and short circuit protection, heat-resistant package. With surface mounted capacitances. European style 3P wiring terminals. Big heatsink chip, convection type heat dissipation. Specification: Model Number: XH-M543 Chip type: TPA3116D2 Signal to noise ratio: 100db Type: Voltage Regulator Channel: Dual channel Frequency response: 20Hz to 20KHz Working voltage: DC 12V to DC 28V Recommended power voltage: DC 19V/24V Static current: 40mA Fit speaker parameters: 4-8 ohms Output power: DC12V 50W Output power: DC24V 120W The product uses the chip aluminum electrolytic capacitors and tantalized polyester film capacitors. The capacitance are large, the chip capacitors and the solder solder board together, there is no solder joint on the back of the circuit board, so there is no possibility of short circuit. Connect : 1. Connect the power input terminal to dc dc12v-28v power supply (24V is recommended) 2, The audio input terminal link audio source, such as MP3, mobile phone, computer, etc 3, Connect the audio output end to the speaker, pay attention to the positive and negative terminals, it is recommended to connect more than 120W professional stage speakers, in order to give play to its effect Package Included: 1PCS 120W/120W TPA3116 Dual Channel Digital Board