The ne24.24M series is built around a standard 4x4 base unit. The 4x12 Logic configuration is achieved by adding two 4-channel output cards and a General Purpose Output (GPO) Logic card to the base unit's expansion slots. The GPO card adds functionality to trigger external devices like projection screens, curtains, or lights based on presets or other defined logic. All configuration and control are done via a PC using Ashly's Protea NE Software over an Ethernet or RS-232 connection. The unit is tamper-proof due to the absence of front-panel controls and multi-level software security. The extensive built-in DSP includes a full suite of functions for each channel, such as equalization, delay, gates, and auto-levelers.