Ideal For Adding Aftermarket Amplifiers to Factory Headunits! Compact 2-Channel Line Output Converter The Aerpro AP3042A is a super compact 2-channel line output converter. Ideal for adding aftermarket amplifiers to factory headunits in most 12V vehicles. Many aftermarket amplifiers only have a low-voltage audio input, this can be problematic when the factory headunit can not be changed or is preferred over aftermarket headunits. The Aerpro AP3042A converts a high-voltage signal from a factory headunit to a low-voltage signal suitable for most aftermarket amplifiers. The built-in signal noise filter helps to reduce unwanted noise commonly picked up from factory headunits. The down-adjustable channel gain makes the Aerpro AP3042A compatible with most aftermarket amplifiers and can also help adjust the signal voltage for individual channels. Features: 2-Channel Line Output Converter Step Down Adjustable Channel Gain Remote Out Trigger Signal Noise Filter Super Compact Design LED Power Indicator Specifications: Operating Voltage: 12V Channel: 2CH Max Input Wattage: 40W Input Format: Open-End Wire Output Format: RCA Packaging Type: Heatsealed Blister Dimensions: 87mm (L) x 65mm (W) x 28mm (D) Weight: 0.17kg