Neets Audio Preamplifier is a network controlled audio preamplifier controlled through LAN or RS-232. The Preamplifier adds additional RS-232 and I/O ports for expansion of the AV system and integrates with Neets and 3rd party control systems.The USB audio input enables direct audio input and volume control from a computer (PC or Mac). The Preamplifier can be powered by Power over Ethernet or the included 12V PSU.