Hmm ... I think this is a mission for the Viech thread. It's an interesting topic for sure - I have a vested interest in this as I have a couple of Beyma drivers laying around waiting for a Viech cabinet to be built around them. However, I did find the PDF I was thinking about: http://sinus-pollux.de/beta/dasviechneu.pdf
This shows some different stuffing strategies and cabinet reinforcement etc.
I stumbled upon the Beyma 10AG/N a while ago, and have been wanting to build a cabinet for it ever since. 'BIBing' it might just be the ideal solution for this speaker.
Driver info for those who are interested;
http://profesional.beyma.com/ingles/pdf/10AGN.pdf
Beyma Breitbandlautsprecher 10 AG/N
The BIB XLS produced these results;
I have a couple of (kind of noobie 🙂 ) questions about it;
-VAS should be put into the XLS in cubic feet? (VAS is 1,0something btw, the field in the XLS only shows it when you open it)
-Cabinet dimensions (results) are in inches?
-How can I make up the length/angle of only angled board in this design?
-What are the depth and width in line 9 and 10?
-What is VB, a-b-c and SM?
( I need to know how to draw up the exact cutsheet for the wood, will be 18 MM thick 🙂 )
Driver info for those who are interested;
http://profesional.beyma.com/ingles/pdf/10AGN.pdf
Beyma Breitbandlautsprecher 10 AG/N
The BIB XLS produced these results;
I have a couple of (kind of noobie 🙂 ) questions about it;
-VAS should be put into the XLS in cubic feet? (VAS is 1,0something btw, the field in the XLS only shows it when you open it)
-Cabinet dimensions (results) are in inches?
-How can I make up the length/angle of only angled board in this design?
-What are the depth and width in line 9 and 10?
-What is VB, a-b-c and SM?
( I need to know how to draw up the exact cutsheet for the wood, will be 18 MM thick 🙂 )
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Correct.
Correct.
Layout per: Bigger Is Better 'BIB' Cabinet Dimensions - ZillaSpeak
Vb = ~net internal box volume or almost 30 ft^3 because of its high Qts! Maybe too high to perform well.
Sm = width x depth cross sectional area in inches^2
GM
Sheesh! I didn't even notice the short length. Oh well, maybe they will have the secret power of the Pyramids. 😉
GM
GM
Thanks for the reply!
I'm not worried if performance will be possible, the results that the 8AG/N (also high QTS) gives in "The Beast" (Das Viech), also a chamberless rearloaded horn, is very good. So at least this type of design is possible. 😉
If it will sound good, well, that remains to be tested.
(Das Viech; )
An externally hosted image should be here but it was not working when we last tested it.
The 'thing' I'm worried about is dimensions, I'll have to mease up things like my workspace and room to see if this is a feasible project... 🙄
If this thing doesn't work out I guess learning to work with Hornresp is the next step, or scale up Das Viech (then again, I could also sim that in Hornresp..)
Ps; about the '10AG/N BIB' Width x depth x heigth= 32 x 45 x 37 = 53280, that does not match up to VB, how come? What is the connection between these two?
Pps; Due to the strange dimensions I'll try folding it. This method (found here under 'How to design a double folded horn') is acceptable?
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IME, low-medium Qts drivers work best in reverse tapered pipes (TQWT, ML-TQWT) and medium-high Qts in expanding ones (horn, ML-horn).
GM
You're welcome!
The height is 74" with 37" being when folded in half. This height is way too low to load the ceiling though, so would need to be turned upside down and floor loaded. Either way puts the driver too low to the floor for most folks, so still may not be acceptable.
Inputting a different driver Fs to find a more BIB-like height is what I would do to get the terminus (mouth) close enough to the ceiling and for small spaces/SAF it also reduces its WxD footprint. FWIW, Fs = ~48.78 is for TC's BIB and seems to work well enough for a ~8 ft ceiling height.
GM
Food for thought, thanks (rigging 'my' BIB to the cieling {PA style} at an angel towards listening position would be an option perhaps, but😉 I''ll go a different route than BIB for the AG/N, but it's remains an interesting design. I'm keeping the XLS. 😉
Ps @ Bubuxxl, how's the Monacor SPH-60X BIB coming along?
Os melhores cumprimentos, Voltcontrol.
Ps @ Bubuxxl, how's the Monacor SPH-60X BIB coming along?
Os melhores cumprimentos, Voltcontrol.
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Hi there GM: With regard to post #28 above (cheap BIB), would the line between low Qts and medium be about 0.35 and between medium Qts and high be about 0.6?
Also: WRTP #29, what is considered the maximum acceptable distance from the top of a BIB to a ceiling to obtain optimum ceilng loading? ...regards, Michael
Also: WRTP #29, what is considered the maximum acceptable distance from the top of a BIB to a ceiling to obtain optimum ceilng loading? ...regards, Michael
voltcontrol,the bib´s are awaiting conclusion of the viech project right now...
and i´ve taken my chances building a bass reflex enclosure for the beymas 8ag/n as well!
it´s just a matter of getting rid of all of them (easy enough,everybody gets dazzled with the beymas)!
And the monacor don´t come cheap,at least getting them to Portugal... 🙁
do you speak portuguese?
kind regards,bubuxxl
and i´ve taken my chances building a bass reflex enclosure for the beymas 8ag/n as well!
it´s just a matter of getting rid of all of them (easy enough,everybody gets dazzled with the beymas)!
And the monacor don´t come cheap,at least getting them to Portugal... 🙁
do you speak portuguese?
kind regards,bubuxxl
I didn´t got the monacor´s...tried getting them from a friend in Holland,but it hasn´t happened yet...
the more loudspeakers I´m building,the more I want to try!😛
Right now I´m giving a try to bass reflex enclosures for the beyma´s.Followed a tip I red somewhere around here,about building it from 10mm mdf,and right now I´m trying to get the enclosure not to ring so much,the whole box plays as loud as the speaker itself!
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Greets!
Around 0.403, Fb = Fs, Vb = Vas, so it's what I use since I'm not aware of any other accepted mathematical mean for Qts.
I use ~0.312-0.577 as the middle range since the former yields the max LF gain BW for the least Vb and the latter the flattest delay. Above ~0.707 is strictly for tuned pipes, horns.
Well, not sure since I've never done a TC style BIB, but I figure it should be a variable based on the effective mouth diameter and flare factor same as for a horn's end correction.
GM
You're welcome!
You could, but that's not what I meant. I was suggesting using a lower Fs to get a longer/taller folded pipe.
GM
Ah. "duh" is the word that comes to mind. 😉
If you still want them I could arrange it for you.
If you have data for a plan, please share. 🙂
Ps. I work for the Dutch affiliate of a PT company, so that's why I know some Portugese catchphrases.
Ate ja!
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