my grounds are good could it be my subs drawing too much power and causing my amp to go into protection mode also I think when it happened the green power light went to red?? It happened once in awhile in my last car I had for 10 yrs and had two yellow tops and a volt gauge and everything was great? Im good at the installation part but not good with the tuning part Im a noob when it comes to that so had a shop do it... It only happens when its really loud and a song has crazy bass and when I turn the volume from 25 to about 18 its fine...