The LOC4 Adjustable 4-Channel Line-Out Converter from Recoil Audio is a line-out converter for factory radios with 2 to 60 watts per channel, accepts speaker level input and provides stereo RCA output signal for adding an aftermarket amplified audio system. It allows 60 watts maximum input per channel and has a linear 20Hz to 20,000Hz output based on input signal. The transformer isolated for optimal sound and performance. The unit maintains correct phasing and works with most factory-installed radios.