The SD403C card is a two group demuxer with balanced digital audio outputs. It provides two SDI outputs and two unbalanced AES outputs on the rear 75 Ohm BNC terminations as well as four 110 Ohm balanced AES outputs on the installed TB102 termination assembly.

The SD403C card can be installed in any position of an MF100 or MF104 Serialboxx frame.The TB102 termination assembly (included), mounts on the rear of the MF100 or MF104 frame directly behind the slot where the SD403C is installed.