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View Full Version : calculating my port can anyone tell me if this is right??

NickCarullo
03-19-2010, 01:37 AM
am i anywhere close to getting this right or do i just sound stupid

so my box is 32"wide 30"deep and 15"high i calculated the volume to be 14400sq inches and 100sqft
and im using 3/4" thick mdf does that mean i takeout that out of the volume?

and on the calculator this is what i put- enclosure volume-100sq ft its gonna be 1 square port tuned too 33hz idk whether to put slot port or not cause its against the wall but it dosent go along the whole wall cause its gunna be 5x5 inches then for the height- 5 and width- 5 cause i dident know exactly what that ment and it gave me length of the port to be -3.51 so is that how deep i should make the port going into my box?
so can someone tell me if this is right and whats the port length and if i put the right calculations on please i want to build this box very soon
AND also should i make my port 5x5 or should i just make it a slot port going along the whole side

Blove1991
03-19-2010, 01:47 AM
With listed dimensions above. Your box has a NET value of 6.79ft^3. NOT INCLUDING SUBS, BRACING, AND PORT DISPLACEMENT

NickCarullo
03-19-2010, 02:02 AM
huh? ugh i dont get it whats that im so confusing this is soo hard to do

oh so how did you get that and what do you mean not including subs bracing and port displacment you have to add that in too? and how do you add that in

NickCarullo
03-19-2010, 12:19 PM
soo anyone else?

mazdakid
03-19-2010, 03:47 PM
30.5x28.5x13.5=11734.875/1728=6.79

skadude016
03-19-2010, 03:52 PM
you have to account for the volume displacement of the sub(s) bracing and anything else internally. Most subs have .1-.25 cubic ft of displacement

NickCarullo
03-19-2010, 05:03 PM
ohokay i get it

Slo_Ride
03-19-2010, 05:06 PM
This may help you out...
Subwoofer Enclosure Calculators, Fraction to Decimal, Parallel, Series, Port Length and Volume Calculators (http://www.the12volt.com/caraudio/boxcalcs.asp#rec)

Let us know if you need more help.