octogon port vs rectangle port!!

[mlstrass 5,000+ posts]

Lol, NO! It will be 22 1/2 degree or 67 1/2 depending on how you look at it.
Fuck an octagon. Go dodecagon or go home!

15 degrees for the dodecagon......I say go for it.

 

[orangecounty1 10+ year member]

debating on building this for my jeep

 

[thehardknoxlife 10+ year member]

debating on building this for my jeep

That's not an octagon.

 

[stangman67 10+ year member]

14gon ftw

 

[thehardknoxlife 10+ year member]

14gon ftw

Tetradecagon //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Here I'll help a bit. designing a box with a octagon port is the same as designing a box with a square port, round port, dick shaped port, etc. find the area of the octagon and go from there.

To obtain the area of a regular octagon (equal sides) use this formula.

Area = a^2( 2 + 2√2 )

a= length of one equal side

Note:

"a" will be the length of the side on the inside of the port, when determining the displacement "a" would be the length of the side on the outside.

 

[orangecounty1 10+ year member]

That's not an octagon.

same conceptsauce

 

[thehardknoxlife 10+ year member]

same conceptsauce

Hexagon

 

[zack1442 10+ year member]

or just aero port //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif maybe

 

[x1le 10+ year member]

spltuscon probably knows a good amount about them

 

[ngsm13 5,000+ posts]

It doesn't fucking matter you fegtard...

nG

 

[spltuscon 10+ year member]

Wow, a thread about the Octoport!! Cool //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

I came up with the Octoport as a way to have a flared port that I could build to any diameter and length I needed. I could also use left over wood instead of buying 6" aeros at $37 a pop. By making it myself I can control port diameter, flare radius, overall flare size, etc...

I also like to be creative and come up with new/ better ways to do things. I'm not interested in copying what everyone else does...successful or not.

To answer you questions about what is louder....in my personal testing the Octo was around 2.5 db louder than a rectangle port with the same tuning. I can't do a direct comparison against a normal PSP aero because they only go up to 6" and all the Octo's I've built were larger than that. I did test vs. a 10" tube with custom flares and the Octo was a couple of tenths up.

I'm not going into how to build them since the way I do it has a lot of steps and most people are never gonna bother anyway.

I have also built a removable version also so I can switch tuning for SPL or daily. Here is a pic of a very loud SPL box for (2) 15's. Does a 154 legal with (1) 5k amp for one of my customers.

 

[spltuscon 10+ year member]

A pic of the removable version on my single 15 test box.

A pic of a finished version. This one was doing 149.8 legal off only 2500w clamped watts.

 

[SPL Blazer 10+ year member]

I wondered how long it would take you to find this thread.

 

[PV Audio 5,000+ posts]

PV audio should have a good answer for this. he is very smart on airflow and wat not.

pv audio?

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gifI'm flattered, but I'm far from one of the more talented members on here. The only difference is that instead of listen to second hand stories, I actually like reading books on theory. While theory is good, such as how ported boxes actually work physically, real world experience and tricks can trump theory. And besides, spltuscon actually builds those for income, so listen to him on the octagon port //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[amartin_72]

Anything to reduce "turbulence" will help. If you were a sound wave would you rather take a 90 degree corner or a nice smooth bend