Redback A4940 handy interface box provides a convenient way to send low level audio signals over long distances via Cat5/6 cabling. The unit has adjustable input sensitivities to handle either microphone (3mV) or line levels (1V) and has provision for phantom power (15V DC). Both of these are DIP switch selectable. The output volume is screwdriver adjusted via the trimpot on the front of the unit. The unit is powered from 24V DC, which can be connected to the DC socket on the rear of the unit, or it can be supplied through the Cat5/6 cabling from other compatible Redback products.
It provides a balanced output which can be received by Redback products such as the A 4942 and A 4946. These products receive the audio signal fed down the Cat5/6 cabling and convert it to an XLR output (A 4942) or an RCA output (A 4946).