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pitu641 View Drop Down
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Joined: 21 August 2015
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Topic: Plans Q-Sub
    Posted: 20 October 2015 at 1:45am
Hello friends I need help, I'm looking for the plans of D & B Q-sub 18 "if it is not flat I wonder how calcuclar tubes triangular tunes, I hope you can help me, thank you, excuse my English I am of Argentina and I'm not very good lol.
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corell View Drop Down
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Points: 1159 		Post Options Post Options   Thanks (0) Thanks(0)   Quote corell Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 2:38am
Email D&B. They have the plans.
Anyone else is not allowed to and/or not able to.
And on a second note, why would you want to build that box anyways?
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 2:50am
I want to build a box with single speaker and it seems very practical
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 2:57am
I'm interested in this model

http://i264.photobucket.com/albums/ii196/csgal14tp/DSC00394.jpg
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Points: 1845 		Post Options Post Options   Thanks (0) Thanks(0)   Quote all bass Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 5:31am
There are so many boxesmin that layout. What drivers are you planning to use?
https://www.instagram.com/my_modular_journey/
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Points: 1632 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Sinfinity Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 2:00pm
Those are made by CSG on this forum.
He sells some occasionally which may save you the hassle of making them.
Might be worth sending him a PM.

Cheers
Matt
Matt at ukamp dot co dot uk
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 7:10pm
Sinfinity I Am from Argentina is difficult to buy. All bass, I want you to put Eighteen Sound 18lw1400
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 7:38pm
Triangular ports are very difficult to calculate, you will need to build prototypes and measure the tuning.

You do not need plans to build something similar to the QSub, you have the external dimensions and you know it has four triangular ports.  Build a prototype, check the tuning, build more.

In good news, the 18LW1400 works very well in that type of cabinet (tuned to about 40Hz)
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 7:41pm
ceharden  40 Hz de resonancia en el recinto?
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Points: 11851 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 7:46pm
Yes, tune the cabinet to 40Hz
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 7:51pm
and how can I do to calculate tuning tubes, I was thinking about calculate 2 square tubes and then break them in half, get me 4 triangles
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pitu641 View Drop Down
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Points: 11 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pitu641 Quote  Post ReplyReply Direct Link To This Post Posted: 20 October 2015 at 8:04pm
the only thing I know is like the triangle has the length 150 mm x 150 mm and 250 mm long for that frequency is tuned
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