okay well i bought to kickers cvt shallow mount 12in subwoofers and i bought a jvc dash stereo with a kenwood 1000 watt 4 channel amp well i installed it and well everything works but i feel its not loud enough i seen youtube videos and everyones seem to hit harder then mine and i feel like one of my subs is hitting harder then the other why is this??do i need a better amp? also what are ohms i dont know much about this how do i set my ohms and what should i set it at please help i just want my system to work like it should thanks...