4.5 ft3 @30hz
3.25 ft3 @ 35hz
Been running 1600 rms for about 6 months now, and it is taking it like a champ. Full tilt almost daily. Previous enclosure was 4.5 ft3 @ 30 hz. This one is 3.25 ft3 @ 35hz. I wanted loud for some reason, s-10s do not like lows at all.