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View Full Version : which ported box program is more accurate?



wcarson8911
02-02-2007, 06:00 PM
the program on RE.com or the one on subwoofertools.com?

j3bus2k3
02-02-2007, 06:01 PM
RE's calc doesnt take into account driver displacment...

Never used subwoofer tools either...

I still prefer a pencil and paper with the forumla of JL's site...

Chevyaudio
02-02-2007, 06:03 PM
yep...pencil and paper always work.

wcarson8911
02-02-2007, 06:09 PM
RE's calc doesnt take into account driver displacment...

Never used subwoofer tools either...

I still prefer a pencil and paper with the forumla of JL's site...

how much would the driver displacement throw the tuning off?

j3bus2k3
02-02-2007, 06:25 PM
how much would the driver displacement throw the tuning off?

depends on size of sub, number of them, enclosure size...could be as little as .5" to a couple of inches...

bholtmeier
02-02-2007, 07:56 PM
depends on size of sub, number of them, enclosure size...could be as little as .5" to a couple of inches...

Inches does not equal tuning. :)

j3bus2k3
02-03-2007, 12:26 AM
Inches does not equal tuning. :)

you take inches off the port length...you add Hz to the tuning...

406er
02-03-2007, 12:37 AM
what i do with the RE box tool is spec out the box. get my tuning/port leight goin acroding to my NET volume. them all hores around with the mesurements and make the box bigger to acomadate the sub volume. and to give a indiaction of how far tuning would be off. the last box i spect out. when driver displacemnt was subtracted from my theryetical NET volume. tuning went down 1hz

i use bass box pro to get my port lenth and aprox box dimensions then u tune it up on paper!

z71tahoe
02-03-2007, 12:38 AM
ive had good results with the re calculator....

j3bus2k3
02-03-2007, 12:52 AM
what i do with the RE box tool is spec out the box. get my tuning/port leight goin acroding to my NET volume. them all hores around with the mesurements and make the box bigger to acomadate the sub volume. and to give a indiaction of how far tuning would be off. the last box i spect out. when driver displacemnt was subtracted from my theryetical NET volume. tuning went down 1hz

i use bass box pro to get my port lenth and aprox box dimensions then u tune it up on paper!

too much work...one forumla and I have all the numbers I need...

bgdre12
02-03-2007, 12:56 AM
ok...no one has ever really explained fully how to build the ported boxes...i've built ported bosxes before, but all teh sides where drawn out...so when you use teh formula..do you basically make a sealed box, then factor in driver displacement, and port displacement, then go from there..?