aero ports

[cynicz 10+ year member]

Ok I have decided to make a box for my 15 inch sub the dimensions will be

W22 x D16 x H18

Giving a total internal area of 2.39 Cubic Feet

Using the site Subwoofer Enclosure Calculators, Fraction to Decimal, Parallel, Series, Port Length and Volume Calculators

Its saying with 2.39 Cubic Feet, 6 inch wide port , and 15.5 inch Long port my tuning will be 40Hz.

Now I have a couple questions

1. How close is the 40Hz tuning estimate?
   
2. is a 6inch diameter aero port too shallow, will it cause whistling or any unwanted noise?
   
3. given the tube has 1 (external) or 2 (internal and external) flared ends will this affect the overall needed length, someone said I need to add .5 inch to the port length for each flared end.
   
4. Do the ports need to be on the inside of the box with a flared end coming flush with the outside or can it just be screwed onto the outside and just stick way out or would this affect the tuning.
   

also if the box is 16 inches deep, sub is 8 inches deep from the mounting spot, given I have 8 inches room left is that enough room for a 6 inch wide aero port? any type of extra bracing I should do for the aero port?

Click to read more...

 

[BlactimusCrime 10+ year member]

1) that box seems too small for a 15

2) you cant use the same calculator for slot ports as you do for aero ports

3) that seems like too much port area for such a small box, for a 2.4 cube box, id go with (2) 3 inch ports

use this.Products Menu

 

[Phoenix Risen 10+ year member]

that box is way too small and has too little port area for a 15, unless your only getting like 10mm of excursion.

what sub are you running?

 

[Buck 5,000+ posts]

You should get a box design from me.

Most 15"s work in 3-4.5 cubic feet, few work in 2.5 or less. If going with aero's, I suggest 2 4" or 1 6" port.

 

[cynicz 10+ year member]

I have 2 incriminator audio lethal injection series subs, but i have a kia forte with a little trunk opening but plenty of trunk space so was trying to design a box that I could build 2 and fit them both in my trunk

 

[Phoenix Risen 10+ year member]

you would probably be better off just running 1 and giving it the box it really wants.

 

[BlactimusCrime 10+ year member]

you would probably be better off just running 1 and giving it the box it really wants.

this. youwill get better output and sound quality out of one in a proper box than 2 in poor boxes

 

[Buck 5,000+ posts]

I have 2 incriminator audio lethal injection series subs, but i have a kia forte with a little trunk opening but plenty of trunk space so was trying to design a box that I could build 2 and fit them both in my trunk

Do 1 in a ported enclosure. Space=bass.

The enclosure is the most important part of a sub stage.

 

[cynicz 10+ year member]

well I mean the internal deminsions of my trunk is like 18-20 inches tall, 28 inches deep that I can play with accounting for back seats slanted angle and 44 inches across

so all in all I have approx

H19 x W43 x D28

but my trunk opening is like 30 inches wide 14-16 inches tall

 

[Phoenix Risen 10+ year member]

i still say your best bet will be just to run one of them.

not to mention its fun when you have single sub systems that will outplay a lot of peoples 2-4 sub setups.

 

[cynicz 10+ year member]

i still say your best bet will be just to run one of them.
not to mention its fun when you have single sub systems that will outplay a lot of peoples 2-4 sub setups.

Ya soon as my probation is up I plan on buying a single either 12 or 15inch DD Z series sub and buying a DD M4a amp and slam on peoples like you said 2-4 sub setups with a single 12/ single 15.

but whats a good box deminsions for one then? and should I go slot ported or aero ported

 

[Phoenix Risen 10+ year member]

slot or aero will work fine. sometimes aeros are a pain to get the length you want, but you can always run elbows.

and put it in about 3.5ft^3 after port and sub displacement.

 

[cynicz 10+ year member]

how can I calculate the port and sub displacement the most efficient way?

 

[Phoenix Risen 10+ year member]

use the aero port calc to find out the length you need for the tuning you want with 3.5 net.

then just figure the volume of the the cylinder. and ad that and another .3-.4 on top of that depending on how much bracing you want to use.

 

[Buck 5,000+ posts]

You could let me design you a box //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif