To use the AKG PSU4000 Central Power Supply Unit, simply connect it to the devices you want to power, like the PS4000, HPA4000, HUB4000, CU4000, or ASU4000. Make sure all connections are secure. When not in use, unplug it to save energy. Keep it in a dry and cool place to prevent overheating. Periodically check the cables for any signs of damage. If you notice any issues, stop using it immediately and contact customer support.