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View Full Version : Can irregular-shaped enclosures be ported accurately?



neonblack
05-19-2009, 01:16 AM
Say a fiber-glass enclosure which is contoured and the exact enclosure volume is difficult to determine? Would it be far too difficult to calculate the correct port length/diameter to achieve a certain tuned frequency and consequently risk poor sound quality or even subwoofer damage?

Jameseypoo
05-19-2009, 01:17 AM
PV Audio would be the perfect person to ask about irregular enclosures.

gotparts90
05-19-2009, 01:17 AM
http://www.caraudio.com/forum/search.php

schrummy
05-19-2009, 01:17 AM
it can be done.

Flipx99
05-19-2009, 01:17 AM
Lemans23

fasfocus00
05-19-2009, 01:18 AM
yes, it's fairly easy. the most difficult part would be finding the actual volume of the enclosure.

Millertime1028
05-19-2009, 01:20 AM
Packing peanuts !

galacticmonkey
05-19-2009, 01:28 AM
Take a rough idea, then using a rough idea of how big your box is, find a good port length.

Cut some aeros to that length, put them in box. Listen. Cut them down, put them back in box. Listen.

Just keep testing until you like the sound.

Flipx99
05-19-2009, 01:29 AM
Take a rough idea, then using a rough idea of how big your box is, find a good port length.

Cut some aeros to that length, put them in box. Listen. Cut them down, put them back in box. Listen.

Just keep testing until you like the sound.


Or you **** up your speakers.

Cravingbass123
05-19-2009, 01:30 AM
line inside of enclosure with water sealer!!!!!!!!

then measure gallons of tap water out, and dump it into enclosure!!!!!!!

then convert!!!!!!!!!!

1 US gallon = 0.133680556 cubic feet


done and done

**** the haters

KyleBechtold
05-19-2009, 01:33 AM
line inside of enclosure with water sealer!!!!!!!!

then measure gallons of tap water out, and dump it into enclosure!!!!!!!

then convert!!!!!!!!!!

1 US gallon = 0.133680556 cubic feet


done and done

**** the haters

the most odd way i have ever heard lol.. packing peanuts is the most common..

How irregular are we talking here guy?

Jameseypoo
05-19-2009, 01:34 AM
http://i40.tinypic.com/a3yx75.jpg

KyleBechtold
05-19-2009, 01:35 AM
http://i40.tinypic.com/a3yx75.jpg


wtf??

WhoSayWho?
05-19-2009, 01:35 AM
line inside of enclosure with water sealer!!!!!!!!

then measure gallons of tap water out, and dump it into enclosure!!!!!!!

then convert!!!!!!!!!!

1 US gallon = 0.133680556 cubic feet


done and done

**** the haters

That's one way, if you are in a hurry. The way we do it at the shop (for our VIP customers) is to use Jello.

Millertime1028
05-19-2009, 01:36 AM
lol keep seeing this dam design

Cravingbass123
05-19-2009, 01:36 AM
That's one way, if you are in a hurry. The way we do it at the shop (for our VIP customers) is to use Jello.

jello is the other very accurate way!!!!!!!

Millertime1028
05-19-2009, 01:38 AM
and tasty!

DonH
05-19-2009, 01:55 AM
is this a mother ******* joke? seriously hahahahaha i love the design james... u bastid!

:laugh: seriously though op packing peanuts or craving bass's awkward unorthodox method haha

neonblack
05-19-2009, 09:44 AM
How irregular are we talking here guy?

Fiberglass enclosure with rounded edges and corners and sides which are > or < 90 degrees.

Thanks for all the great advice. Foam peanuts sound good.

hoss
05-19-2009, 09:55 AM
It can be done, but you have to use an irregulrly shaped port.

t1990le
05-19-2009, 09:55 AM
just use the correct line formula that contors on a line plot the same exact way as the fiberglass box and then take the integral from each side from corner to corner and add them togetther. :) (or fill that bish with salsa and convert)

hoss
05-19-2009, 09:56 AM
wtf??

Oh I know wtf that is LOL.

mmouse57
05-19-2009, 11:28 AM
sure they can if you know what your doing.
angles do not change the overall math angles jsut change the way you might ahve to process the way you calcualte the design thats it :)

http://img89.imageshack.us/img89/2017/photo050109006.jpg
http://img89.imageshack.us/img89/4091/photo050109003.jpg

Rashaddd
05-19-2009, 11:32 AM
I can't believe nobody has mentioned to this poor fellow that bass waves don't work with irregular enclosures, so whether you port it or not its going to sound like **** unless its square

Jameseypoo
05-19-2009, 11:35 AM
I can't believe nobody has mentioned to this poor fellow that bass waves don't work with irregular enclosures, so whether you port it or not its going to sound like **** unless its square

Not true my foreign friend. Square ports work well with L7's (or any other square shaped subwoofer) regardless of the shape of the box because the square frequencies produced. Same reason circle ports/pvc is recommended for circular subwoofers.

hoss
05-19-2009, 11:37 AM
Not true my foreign friend. Square ports work well with L7's (or any other square shaped subwoofer) regardless of the shape of the box because the square frequencies produced. Same reason circle ports/pvc is recommended for circular subwoofers.

Exactly, although Rashyadd did bring up a good point... You might need an irregularly shaped woofer, like an xplod or the bazooka triangle one.

Jameseypoo
05-19-2009, 11:40 AM
Exactly, although Rashyadd did bring up a good point... You might need an irregularly shaped woofer, like an xplod or the bazooka triangle one.

In theory, yes. If the box is something like a trapezoid, or even a rhombus, then I would look into the triangular subs.

Pop da Hatch
05-19-2009, 11:46 AM
In theory, yes. If the box is something like a trapezoid, or even a rhombus, then I would look into the triangular subs.

No wai!!!!!!!!!! Type R will pwn this theory while killing minorities and raping young children in back alleys.........

Rashaddd
05-19-2009, 11:48 AM
No wai!!!!!!!!!! Type R will pwn this theory while killing minorities and raping young children in back alleys.........

How about killing and then raping young minority children in back alleys?

hoss
05-19-2009, 11:49 AM
No wai!!!!!!!!!! Type R will pwn this theory while killing minorities and raping young children in back alleys.........

Type Arghh is only good in some enclosure types... Not all types. If they offered it in different shapes it would appeal to a lot more customers.

Companies like Sony, MTX, Bazooka, quadrasub, etc understood the need and started producing subs of different shapes to meet customers needs.

Pop da Hatch
05-19-2009, 11:51 AM
Type Arghh is only good in some enclosure types... Not all types. If they offered it in different shapes it would appeal to a lot more customers.

Companies like Sony, MTX, Bazooka, quadrasub, etc understood the need and started producing subs of different shapes to meet customers needs.

true true, I wouldnt mind seeing a Triangle Type R. would probably take the world by storm and stand alone on top of the car audio world until they got smart and brought out a square.............

mlstrass
05-19-2009, 11:56 AM
aero's would be the easiest to use for the port and also remember that this is NOT an exacting science, so you have some room for error...