To use the dbx DriveRack 220i, first connect it to your audio system using the appropriate cables. Then, plug in the correct power supply. You'll start to enjoy clear and high - quality audio right away. When using it, make sure the power supply is stable to avoid any interruptions. Keep the device in a cool and dry place. For maintenance, wipe the exterior with a soft, dry cloth regularly. If you encounter any issues, check the connections first and then refer to the user manual for further troubleshooting.