hello everybody.... I have 2 CVR154 Kicker COMPVR 15" subs... ... 500 watts rms each one... 4 ohm DVC woofer... I think I should power it at 1 ohm... is that correct???? this amp is: HIFONICS TITAN TX1505D MONO 1500 watts RMS @ 1 ohm 1000 watts RMS @ 2 ohms 500 watts RMS @ 4 ohms Is this a big deal? $250 shipping included