I will be getting a sundown Sa-8 here when they ship out. I need a amp i was looking at the Rockford prime r500 ,but i dont know if its going to hit them low lows. the box will be 1.2 cuft tuned to 35hz aero port. DOES ANYONE know of a good amp for it UNDER 175 dollars?

Your only running one sub? correct?

I will be getting a sundown Sa-8 here when they ship out. I need a amp i was looking at the Rockford prime r500 ,but i dont know if its going to hit them low lows. the box will be 1.2 cuft tuned to 35hz aero port. DOES ANYONE know of a good amp for it UNDER 175 dollars?

An amp has nothing to do with hitting the lows, the box will determine that.

Why do you want to exceed the manufactures enclosure size recommendations of "0.6 - 1 cube ported tuned to 30-40 Hz"

and in another "1.5 cubes tuned to 35 Hz would slam for a pair... a single 4" Aero-Port will be fine daily @ 15.5" length"?

And Yes the RF should put out rated.