The Cobalt Digital RM20-9243-D-S is a rear I/O Module (Split) Dual 1x4 Balanced Analog Audio I/O (connections are per card) w/ Phoenix type removable modular connectors.
The 9243 Analog Audio Distribution Amplifier with Remote Gain Control is a broadcast-quality balanced analog audio DA with stereo 2x4, mono 1x8, and stereo sum L+R x 8 selectable output modes. Unlike most analog audio DAs, the 9243 electronic attenuators allow overall gain (stereo ganged) and per-channel trim (offset) via DashBoard remote control.