The OT-14 is a fiber optic digital audio amplifier that accepts one optical digital audio signal via a TOSlink connector and duplicates it to four TOSlink optical digital outputs, all on the rear of the OT-14. This allows you to take the optical output of any digital audio source, ADAT 8-channel or S/PDIF optical format, and send it simultaneously to four digital audio targets capable of receiving that same optical format. The OT-14's active electronics assure that the integrity of your digital signal is never compromised.