Im new to the forum and i have a question.

I recently just bought an Audiobahn A16000V and i installed it in my truck and when i came time to turn it on, the protection light just stayed on. i realized i heard a sound coming from the grounding spot itself and could feel vibrations coming through the wire. i thought it might have been the wiring so i hooked up another amp to it and it worked perfectly fine. So im guessing its the amp, but i have never seen anything like this before. Has anyone encountered this or know whats going wrong? Thanks