I see alot of people using pine for their speakers, has anyone tried poplar? It is denser than pine and more stable. Pretty easy to find, at your local hardware/lumber and since its pre-cut into boards you might find you won't have much cutting to do. Slightly more expensive than the pine, but I don't think its a big difference. Just a thought.
Re: Re: Help calculate BIB
I am asking haw to calculate L - line lenght, Sm - terminus area and So - lenght from sealed end top to driver center, for some drivers I can find here (Visaton, or Gradient).
Hereis data for Gradient W160AL8 driver:
Fs = 44.5 Hz
Qms = 2.30
Qes = 0.63
Qts = 0.49
Sd = 127 cm2
Vas = 22 l
Eff. = 87.9 dB
please make a BIB sim for this driver
Scottmoose said:
I am asking haw to calculate L - line lenght, Sm - terminus area and So - lenght from sealed end top to driver center, for some drivers I can find here (Visaton, or Gradient).
Hereis data for Gradient W160AL8 driver:
Fs = 44.5 Hz
Qms = 2.30
Qes = 0.63
Qts = 0.49
Sd = 127 cm2
Vas = 22 l
Eff. = 87.9 dB
please make a BIB sim for this driver
choose of wood cabinet
i'm looking for suggestions for what wood to use for my bib, as i'm having a hard time finding birch ply. the big shop near me has beech ply and plenty of other types of wood, including pine. i'm looking for something that sounds good and is stable, cost is not too much of an issue as this is a relatively small build. no mahogany of course and there is always the option of mdf.
thanks!
MuaDibb said:
i'm looking for suggestions for what wood to use for my bib, as i'm having a hard time finding birch ply. the big shop near me has beech ply and plenty of other types of wood, including pine. i'm looking for something that sounds good and is stable, cost is not too much of an issue as this is a relatively small build. no mahogany of course and there is always the option of mdf.
thanks!
Re: choose of wood cabinet
Greets!
Any of the hardwoods with low moisture retention properties is suitable, such as white oak, white ash, black ash, green ash, and hard maple. Then for those with machining capability or more patience than me: Lignum Vitae, Kingwood, Cocobolo, Tulipwood, Pau Ferro, Honduras Rosewood, Goncalo Alves, Bubinga, Wenge, and Purpleheart.
I love the look of Pine, but until it's been weathered for several decades is it ideally suited for speaker cabs unless well damped like Bob Brines does his MDF cabs and any knots epoxied to ensure they can't rattle/squeak/leak.
GM
Greets!
Any of the hardwoods with low moisture retention properties is suitable, such as white oak, white ash, black ash, green ash, and hard maple. Then for those with machining capability or more patience than me: Lignum Vitae, Kingwood, Cocobolo, Tulipwood, Pau Ferro, Honduras Rosewood, Goncalo Alves, Bubinga, Wenge, and Purpleheart.
I love the look of Pine, but until it's been weathered for several decades is it ideally suited for speaker cabs unless well damped like Bob Brines does his MDF cabs and any knots epoxied to ensure they can't rattle/squeak/leak.
GM
Audio Nirvana 6.5
Hi Scott,
here are messured TSPs from Audio Nirvana 6.5 Standard. Just wondering if the ANs 6.5 BIB would need to be modified for these ... as I might go for this driver.
fs 56Hz
Re 7,1
Rms 1,14
Qms 2,94
Qes 0,27
Qts 0,25
Cms 0,85
Mms 9,49 g
BxL 9,33
Vas 19,7
Le 0,07
Sd 129 qcm
Zilla, did you get my email with the How to Pics? ... got yours mail with the pic (nice one!).
best, martin
Hi Scott,
here are messured TSPs from Audio Nirvana 6.5 Standard. Just wondering if the ANs 6.5 BIB would need to be modified for these ... as I might go for this driver.
fs 56Hz
Re 7,1
Rms 1,14
Qms 2,94
Qes 0,27
Qts 0,25
Cms 0,85
Mms 9,49 g
BxL 9,33
Vas 19,7
Le 0,07
Sd 129 qcm
Zilla, did you get my email with the How to Pics? ... got yours mail with the pic (nice one!).
best, martin
Re: Re: choose of wood cabinet
i'm not really sure which plys are good, i've only heard of people using birch.
thanks, gm. i don't know much about wood and less about woodworking, so i guess you are referring to solid wood. i will inquire about the prices of some aged oak or ash and i will go this route if it's not too much more than ply. i've also seen some nice solid beech (again, i know) that looks quite old and solid. i have a friend that uses it as a base for large iron sculptures, but i'm not sure how it would "sound".
dmason said:
i'm not really sure which plys are good, i've only heard of people using birch.
GM said:
thanks, gm. i don't know much about wood and less about woodworking, so i guess you are referring to solid wood. i will inquire about the prices of some aged oak or ash and i will go this route if it's not too much more than ply. i've also seen some nice solid beech (again, i know) that looks quite old and solid. i have a friend that uses it as a base for large iron sculptures, but i'm not sure how it would "sound".
Hi Martin
Hell's teeth, that's getting on for Lowther levels of difference between T/S parameters. That said, I'd still leave it as is, or use the same line length and driver position, with the terminus area from the Super. The extra length won't be a problem, and the extra volume won't hurt. Personally I'd still buy a Fostex unit, but that's just me. I know them and trust them. Insofar as you can trust any big company. Or little one, come to think of it.
Hell's teeth, that's getting on for Lowther levels of difference between T/S parameters. That said, I'd still leave it as is, or use the same line length and driver position, with the terminus area from the Super. The extra length won't be a problem, and the extra volume won't hurt. Personally I'd still buy a Fostex unit, but that's just me. I know them and trust them. Insofar as you can trust any big company. Or little one, come to think of it.
Scottmoose said:
Thanks Scott!
I see what you mean regarding 'Majors', 's why I rather keep my old Mercedes than get some 'el cheapo' newone...
But for the AN 6.5, I have a personal recommendation from someone I trust alot when it comes to FR drivers, he owns several Fostex and about each and every Modell of the good old Corals. He was actually pretty enthusiastic about the AN 6.5 in Horns, might be his personal taste... as always, there's only one way to find out!
best, martin
Hi
On the topic of enclosure materials, has anyone here tried HDF (medite)? We have pinus radiata marine plywood here, eg no voids 7pcs. compressed for 18mm. It just sucks that it can only be bought by bulk.
Scott and GM,
BTW, I have these old Coral drivers on OB right now, but I'd like to try em on BiB's too. They are 8" coax types - very deep curvilinear cone with annular rings and diffraction horn bullet tweeter rigidly placed in front. Tweeter's magnet very near cone's felt dustcap. Frequency response was 'published' as 30-25kHz. The Fs is quite high though. I only have some of the T/S parameters.
Re: 7.8 Ohms
Fo: 30-45Hz
Fs: 100Hz
Qms: 4.33
Qes: 1.15
Qts: 0.91
Qo: 0.45 (40Hz)
Sensitivity is ~94dB. 15W.
I don't have the Vas. But maybe based on the recommended BR Enclosure Vb from the old catalog, a guesstimate could be arrived at?
BR Plan: http://pic4.picturetrail.com/VOL706/2663514/5316039/93893985.jpg
It has a cloth type reverse roll edge surround much like the Beta series. Sorry, no idea on Xmax too etc. It has pretty stiff surround material almost like thin leather, but it sounds great on OB (needs sub set ~50Hz though for 'heavier' material). Magnet is pretty large, ~4.5" starting from basket legs.
I know it lacks data, hopefully though I can get a ballpark idea on the dims. Thanks!
You guys rock *we salute you*.
On the topic of enclosure materials, has anyone here tried HDF (medite)? We have pinus radiata marine plywood here, eg no voids 7pcs. compressed for 18mm. It just sucks that it can only be bought by bulk.
Scott and GM,
BTW, I have these old Coral drivers on OB right now, but I'd like to try em on BiB's too. They are 8" coax types - very deep curvilinear cone with annular rings and diffraction horn bullet tweeter rigidly placed in front. Tweeter's magnet very near cone's felt dustcap. Frequency response was 'published' as 30-25kHz. The Fs is quite high though. I only have some of the T/S parameters.
Re: 7.8 Ohms
Fo: 30-45Hz
Fs: 100Hz
Qms: 4.33
Qes: 1.15
Qts: 0.91
Qo: 0.45 (40Hz)
Sensitivity is ~94dB. 15W.
I don't have the Vas. But maybe based on the recommended BR Enclosure Vb from the old catalog, a guesstimate could be arrived at?
BR Plan: http://pic4.picturetrail.com/VOL706/2663514/5316039/93893985.jpg
It has a cloth type reverse roll edge surround much like the Beta series. Sorry, no idea on Xmax too etc. It has pretty stiff surround material almost like thin leather, but it sounds great on OB (needs sub set ~50Hz though for 'heavier' material). Magnet is pretty large, ~4.5" starting from basket legs.
I know it lacks data, hopefully though I can get a ballpark idea on the dims. Thanks!
You guys rock *we salute you*.
I had a 4x8 piece of sand ply ripped 4x at 11.25" to keep costs down. Those pieces were brought to another saw to be cut again to the proper height. A 4x8 sheet of particle board was ripped at 7.75" to form the front/back/bottom and inner baffle. I plan to double up the front and back with nice pine once i get the stuffing right.
Peace,
Godzilla
Peace,
Godzilla