heres my box, i'm almost done.

[tRiGgEr 5,000+ posts]

Dude you messed up. The port length needs to remain a constant 3.5" on the width. What are the dimmensions of your box and port???

 

[g30ffr3y 10+ year member]

so this thread was a joke...

if you use the shorter port wall first how the hell are you gonna

compensate for the mounting depth of the sub... genius...

and dont say you are gonna screw it down diagonally like you have

it in the picture... the port width needs to be maintained the whole

length...

i suggest you roll some weed up with your notes and smoke it... because

thats all your notes seem to be good for...

listen to REQ and the others in this thread who have tried to HELP you...

 

[djjdnap 10+ year member]

43.5x25x28

the port is 3.5x25x6.8

so like 17cuft

after displacement its like, 14

 

[JimJ 5,000+ posts]

Looks like the bastard stepchild of a folded horn and a bass reflex enclosure's late night adventures...

 

[g30ffr3y 10+ year member]

i think the particle board box was even better then his ported "box"

 

[djjdnap 10+ year member]

dam aren't we the critics.

People dont read just post, tsk tsk..

Now i'm not sure if i want to add in this extra piece right here are not, if i do i have to cut it at an angle because the subs depth is more than my ports length.

wow, you just said the exact same thing.//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[djjdnap 10+ year member]

essentially i saw a design, like the one i posted. With the extra piece and wanted to see how it sounded, but as i said, the depth of the subs is greater than my ports length. Now all i said was idk if i should use it or not, that extra piece was an ad on by myself.

 

[Beat_Dominator 5,000+ posts]

Ok well are the 43.5x25x28 internal or external? And if you could tell me the actual displacement of one of your subs I can do some quick calculations. It seems way off to me.

 

[Moe Lester 10+ year member]

its such a huge box and such a small port that the length isnt going to need to be very long to achieve a low tuning...

 

[Beat_Dominator 5,000+ posts]

For sure he needs to make that port at least 4-5" wide.

 

[tRiGgEr 5,000+ posts]

I used those dimensions as external dimensions. And used .24 for each driver displacement. Just a rough guess they are 18's right?

And the tuning is what around 33-35hz with that 6.75" port. Now that EXTRA piece you said you should use or not, threw us all off. When you design a box you don't have extra pieces to throw in there. Nor should you be even thinking about throwing extra crap in there.

If I was correct on them being 18's. That box has some serious design issues with bracing. THERE IS NONE!

You need to reinforce those walls. They are very thin and that box is so large it needs to remain as rigid as possible, so bracing is a must.

 

[kuijo 10+ year member]

You need to make sure that your port has an even width all the way around. not at an angle from the base like you have in that picture. It looks good besides that.

 

[djjdnap 10+ year member]

i'll just reinforce them at the edges, and maybe 2 pieces from top to bottom.

It did say extra piece.//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Beat_Dominator 5,000+ posts]

We're just trying to help you so you don't have to build another box man..... That port seems awfully narrow for 2x 15-18" subs.

 

[PhatTonyDeMarco 5,000+ posts]

what did you use, My First Handsaw™?
//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

//content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif