Need advice on Box for 18" TC-5200

[SkwurlyFab 10+ year member]

Kyle sent me the specs for the box:

"3 cubic feet with a 50" area port that is 41" long will work which is a 28Hz tuning frequency."

So that's for a regular slot ported box which would be easy, but I wanna make it with 2 slot ports like my current box. One on each side with the sub in the middle on top like this:

I called Kyle and he said it would work fine with 2 ports, I just don't know how to split em up correctly so that it's still tuned to 28 hz. Obviously each one would have 25 inches of port area, but how long should each one be?

Any help would be appreciated and I'll make sure to post up some pics of the build and the finished product. Thanks.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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[90accordman 5,000+ posts]

half the distanceof the normal one maybe?

 

[jeepintn 10+ year member]

Kyle sent me the specs for the box:
"3 cubic feet with a 50" area port that is 41" long will work which is a 28Hz tuning frequency."

So that's for a regular slot ported box which would be easy, but I wanna make it with 2 slot ports like my current box. One on each side with the sub in the middle on top like this:

I called Kyle and he said it would work fine with 2 ports, I just don't know how to split em up correctly so that it's still tuned to 28 hz. Obviously each one would have 25 inches of port area, but how long should each one be?

Any help would be appreciated and I'll make sure to post up some pics of the build and the finished product. Thanks.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

i get around 52" each

 

[SkwurlyFab 10+ year member]

what program are you using to get 52" each? cuz with a box that's only 3 cubic feet thats really really long isn't it? I'll try winISD, dunno how to use it that well though. Anyone else have an idea?

 

[SkwurlyFab 10+ year member]

I'm trying to plot it on winisd but I don't have the PE parameter so it's giving me an error symbol. How would I get the Pe if it's not listed on tc's website?

 

[SkwurlyFab 10+ year member]

It's tellin me each port needs to be 50.86 now. Sounds clsoe to the 52" measurement.

 

[jeepintn 10+ year member]

ok, is your 3.0 cubic feet after port? or is it the size of 3.0 minus port?

 

[mazdakid 5,000+ posts]

what are you doing with the sub you have now

 

[SkwurlyFab 10+ year member]

I asked Kyle if it was 3 feet before or after displacement and he said before because the box is actually a little big for the driver so the added walls of the port and everythign will bring the volume down to pretty close to the right size. Hard to believe such a large driver can be put in such a small box. I was expecting to get dimensions for a 6 to 8 foot box!

And my other sub is playing happily in my car right now. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[jeepintn 10+ year member]

ok, ill help u out, you got pm

 

[SkwurlyFab 10+ year member]

haven't gotten the pm yet. did you send it allready and it's just not showing up?

 

[SkwurlyFab 10+ year member]

When it's saying 50.86 inches of port length, is that split between each port so that each port gets 25.43 inches or does each port need 50.86 inches by itself?

 

[SkwurlyFab 10+ year member]

...

 

[jeepintn 10+ year member]

each port would get that length...

 

[SkwurlyFab 10+ year member]

So here's what I have drawn up so far. The only thing I don't know how to do correctly is the length of the port walls. There's 4 total as you can see and I know they have to be 3 inches away from the back wall. But I still don't know for sure if each one has to be 50.86 inches or if that's split. If someone could give me the correct measurements of those 4 walls, or 2 I guess since each side is identical, it would help a lot. I'm off to pick up the beast right now from TC sounds so hopefully there's some answers when I get back so I can bang the box out real quick and hear this sub. Thanks. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif