who too trust on box tuning aka port length ect.

[rrob69ewf 10+ year member]

Ok I have been all over a few sites trying to find the correct length of port for a box I am building for my 06 gmc crew cab. I already have it built... 2000 cu inches after the sub. figure about 90 cu inches for the port at almost 13 inches from what i can figure. that is aprox.

my problem is I go to different sites and get different lengths on the port varying about an inch. I would like to get this right. I am looking to get 33 hz if possible

if i do the math it looks like 13.6

i get on different sites and it looks like 12.2-13.9 kinda seems like a big difference

I also tried the winsid program and it just kicked me in the jewels.. I could use some help if someone doesn't mind.

btw these are soundstream SS10Rs one per chamber

Click to read more...

 

[iLL Ridge 10+ year member]

I would use a single chamber. RE's calc works pretty good far as I can see for tuning. I doubt if one inch difference is going to be something you can hear and barely measure.

 

[spltuscon 10+ year member]

carstereo.com has a calculator that is actually correct. RE's calculator is definitely not accurate. In reality though, you probably really wouldn't notice the difference. Some of the calculators don't factor in end correction for slot ports which makes a difference.

 

[Cruzer 10+ year member]

u can try this program. i havent yet but a guy on here recommended it.

http://www.caraudio.com/forums/enclosure-design-construction-help/470740-exposports-torres-gui-based-box-tuning-calculator.html

if nothing else maybe it will agree with another calculator and u can use that one and hope for the best.

im pretty sure re calculator is off. ive typed in jl boxes from their site and it doesnt show the same info, and im sure jl knows what they are doing over an internet calculator

 

[rrob69ewf 10+ year member]

ok I did notice that end correction but it was asked on round ports as well... what is the end correction? I am not up on this I appologize just getting back into this after a long few yrs. Not prison.... kids kind of the same though teenagers lol

 

[Cruzer 10+ year member]

i think end correction is where the port comes to the back of the box, and makes the L shape, 2 things happen. it doesnt go all the way back to the back wall, there is still the port width gap. also where it makes the corner of the L, its a little longer than the port width.

 

[audiophile831 10+ year member]

The Torres App is really good .. it factors in sub displacement, bracing displacement n such .. also gives u better options as far as ports as opposed to the RE calculator that only gives u a slot port option.