ok i'm switching out my 2 15"kicker cvx's for two Fi Q 15"s and don't know which voice coil option to get dual 1 or dual 2ohm?? my amp is 1ohm mono..but i hear the fi subs have some weird voice coil they say the ohm's are like .8 or 1.5 ohm subs???what's the deal with that? if so what do i need to do?