The IS-HUB4 has been discontinued.
The IS-HUB4 is the primary component of the IntraSound System™. It supplies power and analog signal to all the nodes attached to it.
The IntraSound System by Stewart Audio is an innovative distributed audio system which leverages standard Cat5 cable to carry both stereo audio and power. This plug-and-play simplicity partnered with the myriad of possible configurations makes the IntraSound System flexible enough for any application. It can even mimic a constant voltage setup without the need for special transformers or the narrow frequency response.