Different port designs....are they the same tune

[Collin Hagewood]

Im sorry I posted the wrong screen capture

It did help a little extra with the double baffle and sub/bracing displacement...thank you

Still lost on how to set up the port

[Collin Hagewood]

problem is idk how to make 26 in of port in 2 directions

[Collin Hagewood]

One thing I see wrong with the t shaped port you have is that you have to width constant the whole way. Say you have 4 in port going into each chamber you would want where they join together to exit the box to become 8in wide

Are you positive about that?....if so then i should have 2.375 from both chambers and lengthen the main port 2.375.....but the width is right?

[islandpride684]

The length will be the same on the two sides of the port going back, subtract the back and the front wall from the length because it's part of the port, make sure the bends starts at half the width of the port, hopefully I explained that right

[Broke_Audio_Addict]

One thing I see wrong with the t shaped port you have is that you have to width constant the whole way. Say you have 4 in port going into each chamber you would want where they join together to exit the box to become 8in wide

Are you positive about that?....if so then i should have 2.375 from both chambers and lengthen the main port 2.375.....but the width is right?

I should have been more specific I'm talking about the port width. If you have both sides of port at let's 2in then when they make the turn and meet the port has to be 4in wide.

[Collin Hagewood]

ok, I found this but I need a little help understanding it......I need 26" of port

http://i1135.photobucket.com/albums/m632/bobob07/T-portdesignwidthdoesnotequaldis-1.jpg?t=1413960953

From here

http://www.stevemeadedesigns.com/board/topic/9336-8-basic-diagrams-on-how-to-measure-port-length/

.....I was hoping this was going to be easier lol

[Collin Hagewood]

One thing I see wrong with the t shaped port you have is that you have to width constant the whole way. Say you have 4 in port going into each chamber you would want where they join together to exit the box to become 8in wide

Are you positive about that?....if so then i should have 2.375 from both chambers and lengthen the main port 2.375.....but the width is right?

I should have been more specific I'm talking about the port width. If you have both sides of port at let's 2in then when they make the turn and meet the port has to be 4in wide.

what ive read, states otherwise....idk though, anyone else have input on that....im so confused

look at figure f

http://www.stevemeadedesigns.com/board/topic/9336-8-basic-diagrams-on-how-to-measure-port-length/

[Collin Hagewood]

Should I just split this into 2 chambers to make it easier....

[Joe X]

Collin I would post a cutsheet for you if you wanted but if you are tying to learn this yourself that's good too, here is how you do the T shaped port from Torres:

L1 + L2 = whatever you used for port length in Torres:

So that you get why the port splits to half width after the turn, both ends of the port need to have the same cross-sectional area so the two internal ends of the T port total area equals the external end.

[Collin Hagewood]

Ive been sketching and thinking....and I think your right, I was worried about port length correction but even if I was off by 2" in either direction i will barley be 1hz off