Connect the USB cable to the front of the amplifier and open a web browser, then enter http://neetsweb or enter 192.168.0.4 and you will enter the frontpage of the amplifiers webpage.
You can also access this page if the amplifier is connected to a network, simply enter the IP address you have designated it previously.
Remember that if you want your changes to be saved after a power outage, you will need to go to the System page and press Save Settings.