ok guys.....time for alittle help from the jbo car audio gods.......building a new box soon.......gonna use the outside dimensions.......30"w X 16"h X 24"d........with right around 60 inches of port (slot port)........15"h X 4"w...... now im no box builder but i used a program that tells me with a port length of 19.5" that the box is tuned to 30.5 hz......is this right or even close to being right?.......i think it comes out to around 6.67 cubes........before accounting for the port width and the sub displacement.....guys any help would be appreciated...and also can someone pm me about making port plates for spl?
sorry if this is incoherent but its late and im confusing my self with all these numbers
may i ask what program that is?