To use the dbx 286s, first connect it to your audio system using the appropriate cables. Then, plug in the correct power supply to turn it on. When using, adjust the settings according to your audio needs. Make sure to place it in a dry and well - ventilated area. When not in use, turn it off and unplug the power supply. Regularly clean the exterior with a soft cloth. Avoid exposing it to extreme temperatures or moisture, as this can damage the device.