Hifonics colossus at 1.5ohm?

Should be fine especially after box rise. Need a little more info though. How many subs are you running? What impedance is the sub? How do you have it wired up?
It is 3 zv3 18 sundowns wire to either .67 or 1.5 there d1's

 
I was going to use the full range one as a temp bass amp cause I just finished my enclosure and then I'm gonna buy a 7500w amp and use the hifonics for the highs

 
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