Improve sound system. This tundra add an amp for Toyota used to add amplifier or subwoofer for factory OEM radio system to upgrade the stock audio on some Honda and Acura vehicles. The tacoma amplifier adapter only works with OEM factory non-amplified systems (no JBL/Synthesis, Bose, etc.). Easy to install. The rav4 factory radio add a amp amplifier sub interface without cutting any OEM wiring harness required. The corolla line output converter for subwoofer is made of pure copper core that keeps excellent conductivity and ensure lifespan. The tacoma RCA line output converter provide an audio signal to an external amplifier. As well as, a power wire for the remote amplifier turn on connection. The camry add an amp adapter is used to add amp or subwoofer for OEM car radio system to upgrade the stock audio on your Toyota vehicle. The tacoma line output converter help your Amplifier or Subwoofer system much faster and no noise any more. The tacoma add an amp compatible with NON-JBL SYSTEM, fits for Toyota: Tacoma non-JBL 2020-2022, Corolla non-JBL 2019-2021, Tundra 2020-2021, Sienna non-JBL 2018-2022, ,Camry 2018-2021, 4 Runner 2020-2022, Avalon 2019-2021, RAV4 2019-2021, Sequoia 2018-2021. : This amp kit requires 12V constant power!.