Using this Midas PRO9 live audio mixing system is easy. First, connect the power supply to make sure the system gets the right power. Then, you can start connecting your audio sources to the inputs. When you're ready to mix, use the controls on the panel to adjust the volume, balance, and other settings. As for maintenance, keep the system clean by gently wiping it with a soft cloth. Don't expose it to extreme temperatures or humidity. If you're not using it for a long time, store it in a dry and cool place. Always double - check the power supply connection to avoid any issues with power delivery.