Quick Port length help, box is built

[WOT]

Built a box just now and it came out a bit different than first imagined.I just need help on how long to make the SLOT port for 38hz.

Using 1/2" MDF

Box is 37.5" wide X 32" tall X 23.5" deep

Port is 5 3/8" X 31 INSIDE

Sub displacement of .6 and there will be (4) 2"X2" wood braces if its possible to rough those in.

Everytime I punch these number into carstereos calc I come up with less than 6", which I know isnt right. Can anyone punch that in quick for me. just have to cut the baffle and make this port and I was hoping to carpet it today

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[WOT]

bump for after lunch

 

[IDSkoT 5,000+ posts]

I'm not even gunna bother.

Download WinISD Alpha.

Thank me later, ***.

 

[WOT]

I do have WinISD, I tried but dont get how to use the program yet. thanks for the help though

 

[marcotheclepto 10+ year member]

i might be doing the math wrong but the box is 14.7cu ft w/o sub/port displacement? correct

 

[marcotheclepto 10+ year member]

if thats right a length of ~31 will get ya that

 

[WOT]

Ya 14.733 cubes before displacements

31" aint right either though, its 12-15" for 38hz. Had it sketched out by a box maker on here before, but I changed the port and depth slightly

 

[WOT]

Just finished the triple baffle flushmount. Port is all that left.....