wiring amp/painting a spoiler

done, thx for your help, it was the ground, for now i am grounding my system through my rear strut arm lol, kinda ghetto but itll work for a few days until i figure out where im relocating it to… sounds nice tho…

on another note, when its not loud, it produces a faint humming noise, which progressively gets louder as i speed up, someone told me to insulate the remote wire bc the rca wires run from the head unit to the amp right next to each other and might be picking up the tone of my exhaust and amplifying it… any thoughts?
:retardclap :wtf