4 Channel Line Output Converter Transform your factory audio system into a symphony of sound with a 4 channel line output converter. This ingenious device takes the speaker signals from your factory head unit and converts them into high-quality RCA outputs. It's the key to integrating aftermarket amplifiers while preserving the integrity of your audio signal. Get ready to elevate your audio game and let the music soar. Visit - https://www.recoilaudio.com/product-category/signal-accessories/line-driver-line-output-controllers/line-output-controllers/