The DiGiCo D2 Rack is a high-performance, rack-mountable digital stagebox and I/O system designed specifically for DiGiCo's D Series and later console families. Its designation often indicates a configuration, such as "48x16," referring to its capacity for 48 inputs and 16 outputs at the core sample rate (48kHz or 96kHz). A key feature is its dual connectivity: it primarily uses a standard Cat5e/Cat6 Ethernet cable to connect to the console via DiGiCo's proprietary, low-latency "Stealth" digital network, while also providing a MADI (Multichannel Audio Digital Interface) port as a secondary or simultaneous connection. This dual-path capability offers exceptional flexibility, allowing the rack to serve as the main stage I/O for a DiGiCo console via Cat5 while also providing a MADI feed for recording, broadcast, or interfacing with other MADI-compatible equipment.

The D2 Rack is modular and typically comes pre-configured with a set of high-quality analog input and output cards. The inputs feature DiGiCo's discrete, remote-controllable microphone preamplifiers, known for their transparency and headroom. All preamp parameters—gain, phantom power (+48V), and high-pass filter—are adjustable from the console's surface. The Cat5 "Stealth" link is a major advantage, carrying a high channel count (up to 192 channels) over long distances (up to 100m) using robust, readily available network cable. The simultaneous MADI I/O, on optical and coaxial ports, ensures compatibility with a wide range of professional audio gear and facilitates easy system expansion or redundancy.

Built for the demands of touring and installation, the D2 Rack is housed in a rugged 3RU chassis with redundant, hot-swappable power supplies. It includes a clear display for local setup and monitoring. The combination of high channel density, premium analog conversion, dual Cat5 and MADI connectivity, and remote control makes the DiGiCo D2 Rack a versatile and powerful I/O solution. It effectively extends the console's reach to the stage, provides multiple digital output options, and integrates seamlessly into complex audio networks for major live events, broadcast, and theatre.