i have the amp for the subs and everything is the same as it was before i put the new radio in before i put this radio in i had a dual radio and they were hitting really hard and then i put the 5000nex in my truck and it barely wants to push them i have to turn the radio up to thirty just hear them hit i have the subwoofer setting turned on on the radio i guess what im saying is how do u work the settings on the radio i have the crossover on the radio at 80hz and -12 thats the only place they really hit at