Using your Yamaha EMX7 powered mixer is a breeze. First, connect the correct power supply that comes with it to ensure it has the right power. Then, plug in your audio sources to the appropriate channels. Adjust the volume and other settings according to your needs. When you're done, turn off the mixer and unplug the power supply. To keep it in good condition, clean it regularly with a soft, dry cloth. Avoid exposing it to extreme temperatures, moisture, or dust. If you have any issues, don't try to repair it yourself but contact Yamaha's customer service.