Axxess AXLOC4M-80 4-Channel Line Output Converter
The LOC is designed to convert (4) channels of speaker level audio into (4) channels of line level audio. This allows for the installation of line level products such as amplifiers, EQs and crossovers on systems that do not have RCA line level outputs. In addition this device will also detect the presence of an audio signal and then generate a +12V output that can be used to turn-on an aftermarket amplifier.