Well...I believe that the Hifonics is a little overrated but it has better build quality. The MA may put out its rated power but has poorer build quality imo. Also the hifonics does its rated power at 1 ohm and the MA does its power at 2 ohm.
cvrs there cheap and aint got bad reviews unless yal know better for the price of 75 dollars a piece,right now i got a mtx that was rated at like 750 close to 800 i thank on the birthsheet,so what im hering about ma and hifonics,im better off with what i got,it loud but i want more.hard on ur hearing tho,im probably just gonna get another ta series mtx mono amp,there expensieve and power hungry but do alot more than they say,the best amp ive ever had