Ok Seriously Help!!!!!!

omfg we spent like 3 or more hours hooking up my subs and amp to my stock 07 tib radio.. it has the rca jacks and everything is hooked up but the problem is that the sound wont come out of the sub's someone please help me..... i have a new head unit but ffs its kenwood and they r not supposed to have this big of a problem plz help!!

make sure the amp has power, turn the gain on the amp up, make sure the radio is sending signal etc.