Line Converter, Filter

A line output converter lets you add an amplifier to a factory stereo with no RCA outputs, by turning speaker-level signals into a clean low-level signal. This range includes 2-channel converters from Aerpro, Boss Audio, DNA and Stinger, 4-channel models like the Aerpro AP3044A and Rockford Fosgate RF-HLC4, and the Aerpro APU8SUM summing interface for factory systems that split the signal across several speakers.

If you hear engine whine or hum, the Aerpro AP305A and Boss Audio B25N ground loop isolators and the Boss Audio B15N noise suppressor can help clean up the signal. Adjustable converters such as the DNA AAL101 make it easier to match the output level to your amplifier.