Just remain acutely aware that the majority of HiFonics' monoblock amps suffer from someone being a bit optimistic as they wrote the RMS output ratings in the manuals.
Most (not all....as I understand the XX line will do rated power) of them won't quite give you the wattage that the ratings might lead you to believe.
What model? The goilath get loud but u can buy someting that will perform just as good but at better price and build quailty,now the altas square are some underrated loud ass subs that sound GREAT.Shocked the **** out of me.But IIRC they dont make em anymore.