Hi all,
I have 2 TB w4-1320 laying around and I want to build 2 floor standing speakers for my tv.
I have 97cm in height, (make it 40 inches for the US folks), and I'd like to try the BIB.
I downloaded the sheets from Godzilla(thanks man!) And I need a 2.25m line, with an output surface of 310cm2, with the speaker placed at 50cm from the start of the line.
Now, don't have enough height for the standard bib.
So I need to fold twice, but I also want the speaker to be as high as possible, ideally at the top of the cabinet.
So I came up with this solution in the picture.
15971313270311342493500824927051 — ImgBB
As an idea, is it correct?
Any drawbacks of I maintain the original shape of the "tall" bib?
Thanks in advance!
I have 2 TB w4-1320 laying around and I want to build 2 floor standing speakers for my tv.
I have 97cm in height, (make it 40 inches for the US folks), and I'd like to try the BIB.
I downloaded the sheets from Godzilla(thanks man!) And I need a 2.25m line, with an output surface of 310cm2, with the speaker placed at 50cm from the start of the line.
Now, don't have enough height for the standard bib.
So I need to fold twice, but I also want the speaker to be as high as possible, ideally at the top of the cabinet.
So I came up with this solution in the picture.
15971313270311342493500824927051 — ImgBB
As an idea, is it correct?
Any drawbacks of I maintain the original shape of the "tall" bib?
Thanks in advance!
Last edited:
Hi Morpheus82,
Personally I'd do a inverse bib in your situation. Use the other driver position ( approximatly 45 percent down the line ) with rear exit for the mouth. Built a pair for myself using Richard Allen 5 inch midrange pa drivers and when I finally got the stuffing and positioning correct there is a big full clean detailed sound with excellent dynamic bass.
Personally I'd do a inverse bib in your situation. Use the other driver position ( approximatly 45 percent down the line ) with rear exit for the mouth. Built a pair for myself using Richard Allen 5 inch midrange pa drivers and when I finally got the stuffing and positioning correct there is a big full clean detailed sound with excellent dynamic bass.
Hello again,
Inverted with the horn mouth towards the floor. I think planet 10 has a sketch/drawing of a ibib type speaker for the fostex fe126 on there website.
Inverted with the horn mouth towards the floor. I think planet 10 has a sketch/drawing of a ibib type speaker for the fostex fe126 on there website.
What Jonny5 said; you will be very disappointed with its performance and/or need to high pass your drivers well above their Fs to protect them if the mouth/terminus isn't preloaded by a room surface, preferably at least a floor/wall junction [1pi space].
GM
GM
Maybe I didn't explain myself well.
The speakers will be placed to the wall, so they should see 1pi space, am I right?
Will this be a good loading? I know BiBs perform best in a corner but I can't put them in a corner.
I had to fold twice to keep the maximum height of 97cm, is it something that could influence the speaker response?
The mouth is still on the top, as in the original plan, will it be an advantage to invert it and have it towards the floor?
I read the best results are in the corners and pointing up, but I might be missing something...
A better sketch after more design:
BIBw4 — ImgBB
The speakers will be placed to the wall, so they should see 1pi space, am I right?
Will this be a good loading? I know BiBs perform best in a corner but I can't put them in a corner.
I had to fold twice to keep the maximum height of 97cm, is it something that could influence the speaker response?
The mouth is still on the top, as in the original plan, will it be an advantage to invert it and have it towards the floor?
I read the best results are in the corners and pointing up, but I might be missing something...
A better sketch after more design:
BIBw4 — ImgBB
With the mouth exiting half way up a wall will be 2pi loading. The length of line of my speakers is approx 2.1m and overall height is1.085m. I need to be near the rear wall to get proper bass weight.
No, you were clear enough the first time. 😉
Again, what Jonny5 said. 🙁
GM
Edit: Which TB W4-1320?
Last edited:
Thanks for the info.
I'm trying to redesign the fold scheme, and I was thinking about another idea.
Would it be beneficial to place the mouth 45degrees between floor and rear wall?
Or, even better, position the mouth in the lower side of the cabinet? In this way the mouth would "see" the equivalent of the corner as in the standard BiB, but in this case would be the horizontal corner instead of the vertical one. Any thoughts?
I'm trying to redesign the fold scheme, and I was thinking about another idea.
Would it be beneficial to place the mouth 45degrees between floor and rear wall?
Or, even better, position the mouth in the lower side of the cabinet? In this way the mouth would "see" the equivalent of the corner as in the standard BiB, but in this case would be the horizontal corner instead of the vertical one. Any thoughts?
The mouth on mine is at 45 degree. Works fine. As long as you keep the effective length of the horn and the mouth area to the correct dimension there should be no problems.
Thanks Jonny5, good to know it seems to work.
I wonder if a lateral mouth would actually work in the same way as the top mouth, corner loaded...time to make an experiment...
I wonder if a lateral mouth would actually work in the same way as the top mouth, corner loaded...time to make an experiment...