The method for powering a car stereo described above relies on the stereo's on/off switch and does not offer a way to interrupt power to the stereo; if you need a way to interrupt power, you can install a toggle switch in the positive (red) power wire. read more
Turn the car stereo power switch to OFF position. Turn the power supply switch to OFF position. Plug the power supply to a 110 volt AC outlet and turn on its power switch. Turn on the power switch of your car stereo. Adjust the volume and other sound settings of your car stereo to check for sound and sound quality. read more