Using this Grass Valley 8900 Series chassis is easy. First, make sure it's connected to the correct power supply included with the product. Plug in the four 8910ADA - M analog audio distribution amplifier cards. You can then connect your audio sources to these cards for distribution. When using, avoid placing it in a high - temperature or humid environment. For maintenance, clean the chassis regularly with a dry cloth to prevent dust accumulation. If you encounter any problems, check the connections first and then contact customer service if needed.