port design please HELP!

[Team TH (Donny) 10+ year member]

They need 3 cubic feet each in a ported enclosure. Tune the subs to 32-40hz.
Box Specs.

Width: 45"

Height: 18"

Depth: 17"

MDF Thickness: 3/4"

This is a box for 2 x 12" Ipipe subs. Total volume: 6.4ft^3 before displacement.

To port this box, tuned to 35hz you need:

3 lengths of 6" Diameter PVC Pipe, 27" long each.

The subs will fire upwards, while the ports will load into the end of the box.

^^^^^ Lol, this. Haha I really need to refresh my page before I summit a post. Nice quick response; rotrojordans! I'm new to the online posting so I'm kinda slow, lol.

 

[jlanebpc 10+ year member]

so where would i put the ports ? above ? below ?

 

[retrojordans 10+ year member]

I just sketched this rough drawing up to show you how it should look...

 

[BlactimusCrime 10+ year member]

6 cubes sounds way too big for 2 12s... most can be ran in 3.5-4 net for a pair

 

[Team TH (Donny) 10+ year member]

Ok.. Picture in your mind a sub box in front of you. The box stands as tall as you, this is Height. Now the width is obviously compared to you as shoulder to shoulder in measurement in this premade vision I'm giving you. Thus would leave you the last dimension in a 3 dimensional aspect to be Depth. I didn't know exactly how to answer this so hope this helps.. Did it, lol?

 

[retrojordans 10+ year member]

6 cubes sounds way too big for 2 12s... most can be ran in 3.5-4 net for a pair

Got the number directly from the Audiopipe website.

 

[BlactimusCrime 10+ year member]

Got the number directly from the Audiopipe website.

and the rest of your numbers are off as well, with those outside dimensions it gives you 5.1 cubes net and with 3 6" at 27" long pvc tubes it gives you a 38hz tuning

 

[Team TH (Donny) 10+ year member]

6 cubes sounds way too big for 2 12s... most can be ran in 3.5-4 net for a pair

Well, I'm assuming retrojordans checked up on those subs.. All subs require different amounts of airspace and yes typical 12's recommend about 3.5-4 cubic feet for a pair, but thats average of all subs.. These could be the larger airspace recommended subs to make that average what it is.

 

[jlanebpc 10+ year member]

just to make sure were on the same page this is my sub Audiopipe TXX-APX12W

 

[Team TH (Donny) 10+ year member]

Hmm... Well with my pretty accurate program I got 4.99 Cu Ft Net, 6.44 Cu Ft Gross, 36.37 Hz, 16.99 Port Area Per Ft. This given information from me, is from my received information into my program of a box recommend by retrojordans with information including flows; Width: 45", Height: 18", Depth: 17", using 3/4" wood, and porting with 3 total ports at 6" diameter and 27" in length.

 

[retrojordans 10+ year member]

and the rest of your numbers are off as well, with those outside dimensions it gives you 5.1 cubes net and with 3 6" at 27" long pvc tubes it gives you a 38hz tuning

Sorry dude I use this calc always have.

RE Enclosure Calculator

And this round port calc.

Car Audio - PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES

I don't know what to tell you :/

 

[Team TH (Donny) 10+ year member]

God, I should call it a night I'm typing slow and can't spell tonight.. I meant to say in my last post "...with information including follows; Width: 45"..."

 

[Team TH (Donny) 10+ year member]

rertrojordans is actually pretty accurate with using that calculator for its rather close to mine. My calculations are super accurate yet either because I don't know the subwoofer displacement which will change some info slightly and I'm assuming with those pots 0 common port walls would be used without an extra baffle.

 

[Team TH (Donny) 10+ year member]

retro, am I being too technical with stuff? Or you and everyone else understanding what I'm saying...

 

[retrojordans 10+ year member]

I really don't care I put 2 minutes total into this whole thought process. And just use my measurements as internal measurements and you'll be fine..