The Vintage Alpine 3516 Power Amplifier is a 2-channel amplifier that has been tested and confirmed to be in working condition. It comes with an RCA adaptor, making it compatible with various car audio systems. With the respected brand of Alpine, this amplifier is sure to provide quality sound and power for your car audio setup. Whether you are looking to upgrade your current system or restore a classic one, the Alpine 3516 Power Amplifier is a reliable choice for audiophiles and car enthusiasts alike.