For straight-forward analog audio monitoring, the AR-AM4-BG-2 delivers simple setup and operation, making it one of the friendliest audio monitors on the market today. With four analog stereo balanced XLR inputs, the AR-AM4-BG-2 makes it easy to check audio sources whether on set or in the equipment room. An RS-232 control port makes it the right choice for automated systems. The 1RU design makes it an easy fit into any rack setup, and the speakers deliver enough "punch" to be heard even in the noisiest server rooms. The AR-AM4-BG-2 comes with one 12V universal power supply.