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View Full Version : Help me reverse engineer this box!!



rc10mike
05-16-2008, 09:32 PM
Im not to experienced w/ ported enclosures so a little help here. Its a dual 12, single slot port design, with a few small internal braces.

Its external dimensions are (made with .75 mdf)
32"w
14"H
22"D

Slot port dimensions are
3"w
12.5" H
20" L

I just want to figure out the tuning freq.

edzy
05-16-2008, 09:38 PM
throw the specs in here.

http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

rc10mike
05-16-2008, 09:51 PM
Thanks!

PV Audio
05-17-2008, 01:01 AM
Yeah, throw them in there and get the wrong answer. If you don't have an answer by tomorrow, PM me and I'll figure it out for ya.

ngsm13
05-17-2008, 01:05 AM
After port, sub, brace displacement ~3.8cubes NET @ ~32hz...

Decent box for 2 12's... maybe need a little more port...

nG

PV Audio
05-17-2008, 01:07 AM
Nice save jizz'em, I'm too busy with ****ing differential equations **** to worry about that. :)

dragnix
05-17-2008, 01:08 AM
Yeah, throw them in there and get the wrong answer. If you don't have an answer by tomorrow, PM me and I'll figure it out for ya.

it's not too bad, seems fairly accurate to me

ngsm13
05-17-2008, 01:09 AM
Nice save jizz'em, I'm too busy with ****ing differential equations **** to worry about that. :)

Man **** diffy Q...

nG

PV Audio
05-17-2008, 01:10 AM
I've seen answers off by 40%. And if you're calculating a 1.25 cubic foot box to 32hz, I trust you see that 40% error there is unacceptable.

PV Audio
05-17-2008, 01:10 AM
Man **** diffy Q...

nG
You're doing engineering too, correct?

dragnix
05-17-2008, 01:11 AM
hmm...but i hate doing it by hand :crap:

PV Audio
05-17-2008, 01:11 AM
hmm...but i hate doing it by hand :crap::laugh: Touche

dragnix
05-17-2008, 01:11 AM
shitttttt....i gotta take differential after calc 2 and 3 :crap:

ngsm13
05-17-2008, 01:15 AM
You're doing engineering too, correct?

Yeah, just recently re-enrolled changed my major to BioMed...

nG

lil_italy773
05-17-2008, 01:21 AM
hey rc10mike were u from in jax? i lived there for a year pablo ave in jax beach. arlington?

PV Audio
05-17-2008, 01:22 AM
Yeah, just recently re-enrolled changed my major to BioMed...

nG:crap: Good luck. But you want that paper, so I understand :D

PV Audio
05-17-2008, 01:23 AM
shitttttt....i gotta take differential after calc 2 and 3 :crap::laugh::laugh: I just now took the time to read your av. Nice :D