The IS-AmpNode-10 has been discontinued.
It converts any speaker into a powered speaker and can daisy-chain to other nodes in order to expand the system.
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.