The Iso-Max CI-RJ2R by Jensen is a two channel input isolator that lets you extend unbalanced signals to 100 meters (350') using standard CAT-5 or CAT-6 balanced twisted pair Ethernet cable.
Sold as a 'transmit and receive' set, the design begins with two rugged flanged steel enclosures for easy mounting under a desk or inside a rack or NEMA enclosure. Each end is equipped with RCA inputs and outputs with a standard Ethernet RJ45 type connector in between. One merely connects the source and destination devices using the RCAs and bridges the two units using off the shelf CAT-5 or CAT-6 cable. This enables the system designer to employ pre-wired network cable to run analog audio throughout a facility without having to fish new wires. But it gets even cooler......if you purchase a second set and jumper the send unit to it's twin and the receive unit to its twin, you now have 4 channels of RCA that can be sent over a single RJ45 cable. Because ethernet Cat5 or Cat6 cable is made up of 4 pair cable Jensen took adavantage of the situation and added an additional RJ45 connect
Plug and play easy to use, this passive interface does not require any power to work. Inside the receive module are two Jensen high performance transformers that are able to withstand signal levels to +19 dBv at 20 Hz without any discernible distortion. These provide galvanic isolation between the input and output to eliminate hum and buzz caused by ground loops, rejecting noise by as much as 124 dB. Once installed, the CI-RJ2R will quietly go to work without introducing distortion, phase shift or artifact of any kind.