I was hoping someone could explain how to hook up this amplifier Pioneer GM-H120...I was reading an old thread and apparently this amp has something called a floating circuit. You have to ground the "shields" but I don't know what SHIELDS mean???
Maybe put your car audio post in the car audio section.
https://www.diyaudio.com/community/forums/car-audio.38/
https://www.diyaudio.com/community/forums/car-audio.38/