Line Output Converter new line output converter. This line-level converter / High-Low converter allows the user to run an RCA cable to an amplifier with a radio that only has speaker wire outputs. Each converter does 2 channels (2 speakers) The black wire is your ground wire. This can be used for either car audio or in-home applications This is a very good quality Line Output Converter that you will not be disappointed in Specifications: Run an RCA Cable to an Amplifier with a radio that only has speaker wire outputs. 2 Channels Used for Either Car Audio or in Home Applications Tips: The color may vary depending on the light. Due to manual measurement, please allow a slight difference of 1-2cm. Thank you for your understanding and attention, and wish you a pleasant shopping experience.