Using this dbx 1231 graphic equalizer is easy. First, connect it to your audio system and plug in the correct power supply. You can adjust the audio frequencies by moving the sliders on the 31 - band graphic equalizer. When using it, make sure the power supply voltage matches the device requirements to avoid damage. For maintenance, keep it in a dry and clean place. Wipe it gently with a soft cloth if it gets dirty. Don't use harsh chemicals to clean it.