To use the Midas DL431 microphone splitter, first connect your microphones or line - level sources to the 24 input ports. Then, connect your output devices to the 72 line - level output ports. Make sure to plug in the correct power supply that comes with the product. When it comes to maintenance, keep the splitter in a dry and clean place. Avoid exposing it to extreme temperatures or humidity. If there are any issues, check the connections first and then contact customer support if needed.