If i remember correctly the B139 has a Qts of 0.375 & a Vas of about 3cuft. As it's bass resonance is approximately 29.5Hz why not stuff each one in a 3cuft (3 cubic foot) box tuned by a reflex port to 30Hz
F3 will be at the box tuning frequency, is 30Hz -3Db good enough? If not then tune it lower & expect a more gradual rolloff from a higher frequency.
F3 will be at the box tuning frequency, is 30Hz -3Db good enough? If not then tune it lower & expect a more gradual rolloff from a higher frequency.
Scott & i did a modern TL for the B139. So far i have drawn up 3 variations. Transmission Line Speakers
A friend has built these ones (he shortened them a couple inches to fit in his room):
He likes them alot.
dave
A friend has built these ones (he shortened them a couple inches to fit in his room):
He likes them alot.
dave
Only on ebay or suchlike as far as i know They are long out of production.Are B139's or such type woofers still available ?
If i remember correctly the B139 has a Qts of 0.375 & a Vas of about 3cuft. As it's bass resonance is approximately 29.5Hz why not stuff each one in a 3cuft (3 cubic foot) box tuned by a reflex port to 30Hz
F3 will be at the box tuning frequency, is 30Hz -3Db good enough? If not then tune it lower & expect a more gradual rolloff from a higher frequency.
Maybe this design would be ok.I was thinking about coffin sub ,but i need to build 2 ,because i have 4 drivers.but i dont know what will happen if i put 2 coffin subs on the left and right side of the room.(phase interference etc??)
1 cubic feet is 28 ,31 litres?
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Yes So effectively you'd need about 85L + port volume & any bracing as well as a bit to add for each driver1 cubic feet is 28 ,31 litres?
If you were driving them via a seperate amp (for the subs) there is no reason why you couldn't alter the phase to any sub to bring the whole lot into time alignment, well with a bit of fiddling about anyway
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How do the oval Tang-Band's compare to the B139's?
This might be heresy to some, but I was wondering if anyone can share DIY experience of the various race-track format woofers and subwoofers made by Tang Band?
Here is a link to one of them:
www.tb-speaker.com/detail/1208_03/w8q-1071f.htm
cheers
Doug
Are B139's or such type woofers still available ?
This might be heresy to some, but I was wondering if anyone can share DIY experience of the various race-track format woofers and subwoofers made by Tang Band?
Here is a link to one of them:
www.tb-speaker.com/detail/1208_03/w8q-1071f.htm
cheers
Doug
Heresy? Lol How could it be when that driver will out perform the Kef driver.This might be heresy to some, but I was wondering if anyone can share DIY experience of the various race-track format woofers and subwoofers made by Tang Band?
From the specs it will require a slightly smaller enclosure but will still reproduce to about 30Hz f3. It'll handle a rather lot more power & it might just be 1Db W/M less sensitive. The Xmax is definately more, though i'm not sure if that which was quoted is peak or pk - pk. If it's peak then it'll vastly out perform the Kef driver
Hello i have 4 kef b139 and 4 kef b110 speakers.I want to make separate enclosures for this drivers.I like big enclosures and very low bass.What do you suggest?
Hi Galop
If you like big enclosures, you are going to luv these.
The speakers are transmission lines that I built many years ago, and they use the KEF B139 / 110 / T27 and Celestion super tweeter.
Here are the dimensional layouts and the crossover details if you are interested.
With external dimension of 1400mm tall, 500mm wide and 640mm deep, this is one big bugger.
If you want any further details, please let me know. I have the full construction plans and original articles.
Regards
George.
Attachments
I was collecting B-139's to clone the TDL reference
If you like big boxes thse may be what you want
The TDL Reference Standard
http://digilander.libero.it/piani/tdl_electronics.htm
If you like big boxes thse may be what you want
The TDL Reference Standard
http://digilander.libero.it/piani/tdl_electronics.htm
hello, I wonder if you ever got my previous message, I am interested in what you have to share for a diy project out of b139b's and b110's along with t27...thank you in advance for your timeHi Galop
If you like big enclosures, you are going to luv these.
The speakers are transmission lines that I built many years ago, and they use the KEF B139 / 110 / T27 and Celestion super tweeter.
Here are the dimensional layouts and the crossover details if you are interested.
With external dimension of 1400mm tall, 500mm wide and 640mm deep, this is one big bugger.
If you want any further details, please let me know. I have the full construction plans and original articles.
Regards
George.
regards
angelo e
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