my box is 45
Mine it´s 41 on the maths , but after 45´s , threaded rods and a couple of other things i´m pretty sure it´s around there lol, it plays low anyways, got to love DD´s
mines a 4th haha but i think i messed up my port so i think im in the 40hz range now if my math is right but oh well i can always make the port bigger