I have 3 12" kicker CVR's and i have kickers zx1000.1 amp.. max 1400w. each kicker is 400 or so.. is it possible too run 3 subs on that or will i have too buy a separate amp for the xtra sub?
If all 3 subs are dual 4 ohm, yes. Wire the dual voice coils on all 3 subs in series - then wire all 3 subs in parallel to the ZX1000.1. The amp will see an impedance of 2.66 ohm which is fine for that amp.