The DA304B card is a digital audio distribution amplifier that can provide eight 75 Ohm unbalanced outputs, or with an optional TB103 termination installed, six 110 Ohm balanced outputs.

Front edge mounted status LEDs indicate signal presence, eye pattern violation, and loss of signal. An LED also illuminates when the cable EQ switch is activated.

The DA304B can be installed in any position in the MF100 or MF104 Serialboxx frame with the optional TB103 termination assembly (sold separately) installed directly behind the DA304B. In this configuration, the DA304B will provide one 110 Ohm input and six 110 Ohm outputs on Phoenix pluggable screw terminals.