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It is switch mode DC regulated power supply, it composed of electronic switch tube and electronic switch oscillator. Such as ordinary desktop computer power supply is switching power supply.

SIZHENG audio monitoring can use 8V to 18V wide range DC regulated power supply, it is recommended to use DC12V regulated power supply.

Current consumption of one audio monitoring is about 20 to 50 mA, that means 1 ampere DC regulated power supply can supply at least 10pcs audio monitoring to work at the same time. You should consider power-supply efficiency and line loss problem when in application, try to choose higher nominal value power supply.

Audio ground wire of audio monitoring and power negative electrode close 2 for one, also it must be connected to negative electrode of DC regulated power supply and ground wire of audio equipment audio input (LineIn) at the same time. Instruction of wiring connection as below:

Audio signal wire and audio ground wire can be directly connected devices:
walkman earphones, active speakers, IPC camera, audio and video distributor, DVR, video server, sound console, recording machine, sound card, or other equipment with the Line In linear input end (it is forbidden to connect the microphone interface)