PowerBass ALC-2 Line Output Converter / Line Driver The ALC-2 is a premium 2-channel LOC (Line Output Converter) for integrating factory OEM radios with high level outputs to aftermarket amplifiers with low level inputs. Using high quality low tolerance components and SMD (Surface Mount Devices) Technology the high level factory OEM radio output signal is converted to a low level signal while increasing the output voltage up to 13Vrms to deliver them to the amplifier inputs with no gain loss.