The device shall provide twelve inputs, eight analog mic/line inputs with dedicated acoustic echo cancelling, that are adjustable from line to mic level with coarse gain, fine trim, phantom power, invert and mute and four analog line level that are adjustable +4 dBu or -10 dBV nominal with fine trim, invert and mute; plus eight analog line outputs that are adjustable +4 dBu or -10 dBV nominal with fine trim and mute. Levels, phantom powers, signal inversions and mutes shall be controllable via software. Audio connections shall be accessed via rear panel 3.81 mm terminal block connectors. An option card slot may accommodate either a 4 channel analog input card, 4 channel analog output card, 4 channel digital input card, 4 channel digital output card, 4 channel aec input card, 2 line analog telephone interface card, 2 line voip interface card, usb audio card or remain empty. Network audio expansion shall be provided by the Dante protocol with a capacity of 128 (64x64) channels. Primary and Secondary Dante network audio connections shall be provided for redundant network implementation. Connectors shall be gigabit RJ45 utilizing CAT5/6 cable. A designer software application shall be provided that operates on a windows computer, with network interface installed, running Windows® XP or higher operating system. Computer connection for configuration shall be via the device’s rear panel Ethernet connector. All internal processing shall be digital (DSP). Available DSP components shall include (but not be limited to) various forms of: mixers, equalizers, filters, crossovers, dynamics/gain controls, routers, delays, remote controls, meters, generators, onboard logic and diagnostics.