The Allen & Heath xDR-16 is an excellent 16-input and 8-output expander designed specifically for iLive digital mixing systems. It comes with a correct power supply, ensuring stable operation. One thing to note is that there's slight wear on the top left rack ear, but this doesn't affect its performance.

Using the Allen & Heath xDR-16 is quite straightforward. First, connect it to your iLive digital mixing system. Then, plug in the correct power supply to get it up and running. When using, make sure all connections are secure. As for maintenance, keep it in a clean and dry environment. Periodically check the connections to ensure they're tight. Regarding the slight wear on the top left rack ear, just be a bit more careful when handling it to prevent any further damage.