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In Reply to: RE: optimal horn type posted by ogima on May 30, 2007 at 13:41:36
Azurahorn is an option, but I think the Le Cléac’h flare rate gives you a longer horn than a Tactrix flare rate and at 200hz you already have quite a long horn.
You can do a fast calculation of the lenght for a 100hz horn and a 75mm thoat compression driver and see if you can fit it properly in your set-up.
If not you would have to bend it, and I wouldnt know how good that would be....
For that driver I would go all out and get a Western Electric snail horn!
You would probably have to make a complete room for your system...
Follow Ups:
Hi Saturntube,
Thanks for your suggestions. Yes, I realize it`s a huge horn. I plan to
have an mdf straight horn made for the Ale driver which will have a
dedicated listening room built around it.I just can`t determine which is
the best horn option to use. Thanks again.
Dan
So it is a straight MDF horn for the ALE P1260 driver with a 75mm throat:
The Tactrix flare rate is the shortest one so you can play around with this page untill you reach a compromise on size vs lowest freq.
http://melhuish.org/audio/tractrixcalc.html
The main problem will be to time align the driver with the next 800hz driver.
"Apparently, tractrix is not ideal below a mouth circumfrence of approximately 88 cm ( more or less 100 hz )"
I think you are refering to the John Hasquin quote:
" I would advise you not to make a horn any bigger than 88cm mouth. The 95cm mouth horn is too big and you will not be able to get good high frequency out of it. A 95cm mouth horn with 10cm throat will be about 92cm deep. For a horn that is between 80cm to 73cm deep, you will need a very efficient speaker like the Fane Studio 8M or the Ciare 8.5 Nd MR "
I think he meant this for a horn coupled to a normal 8" speaker like the Studio 8m or say a Lowther speaker (for comparison purposes only). With a specialized compression driver like the ALE P1260 you can almost use any size and lenght horn you wish...
Dont go for a terribly long horn I think time alignment is key here...
Or you can just forget about time alignment and get any lenght horn and see how it sounds....
Yes, you`ve hit the nail on the head. I had read John Hasquin`s comment`s
which really set me to wondering if I was considering something fundamentally wrong by choosing a spherical tractrix or exponential horn
for the 70hz to 800hz range. If you`re right that John was refering to a cone driver in his comments then that would certainly simplify the issue.
Time alignment won`t be problem as I will use an active amp and crossover setup with will permit electrical alignment.
You`re response has been very much appreciated.
Dan
Ciare 8.5 Nd MR
http://www.assistanceaudio.com/08_CIARE.html
http://www.ciare.com/oem_new/index.html
Do send us pics of your setup when its finished!
All the best
Many thanks Saturntube...NT
hi ogimathis driver is a sub basshorn driver, lowpass crossover should not be higher than 100hz. ( ideal is 50 - 60hz ) The best is to use a original ALE basshorn, ore one made on specifications similar as this one. This are the ALE original Horns for this driver :
http://www.flickr.com/photos/audiovoice_hornloudspeakers/472612604/
http://www.flickr.com/photos/audiovoice_hornloudspeakers/472612596/here the plans for diy :
http://www.flickr.com/photos/audiovoice_hornloudspeakers/472616177/
i heard this basshorn with your driver in japan :
http://www.flickr.com/photos/audiovoice_hornloudspeakers/472604712/
and even with the driver electronically time aligned, i heard clearly that the sound was coming from a long distance in front of me ( 12m )
i recommend you to high pass it at 20hz, otherwise it will blow easily. Jean Yves Kerbrat wich uses this drivers blow it , at to get replacement diaphrama in japan is not a easy task, and expensive.
I do not recommend this sub basshorn solution. It looks impressive, but the obtainable result is questionable. Mr. Marcel Roggero uses 12 Altec 515-8GHP ( 6 per side ) in his basshorn, and gets a clean 18hz.
http://audiyofan.org/forum/viewtopic.php?t=5555&sid=6b43b905f198494403fad4d013512d50
People in france who heard it say it is much better than the system from Jean Yves Kerbrat
http://www.flickr.com/photos/audiovoice_hornloudspeakers/495469539/
rds Angelo
Hi Angelo,
Thank you for your response. However, my intention is not to use the
P 1260 in a sub bass application as it is a middle low frequency driver
which Ale recommends in the frequency range of 70 hz to as high as 800 hz. Are you saying that you did not like the Ale sound from your audition experience in Japan due to the horn length or because of the Ale tone. A 70 hz to 800 hz horn is not really all that long ( much shorter then a sub bass horn by far ) and should be easily time aligned electronically. But if the tone was not pleasing that`s a whole other
thing. Did you listen to the Goto drivers while you were over in Japan ? If you did,what was your impression ? Thanks...
Dan
hi Dan
for this driver you can see the japanese tachion site :
http://www.tachyon.co.jp/~sichoya2/ale/horns.html
here pictures of horns that may would work, however without specs to diy, but you get a idea :
http://www.flickr.com/photos/8010632@N05/497346407/
http://www.flickr.com/photos/audiovoice_hornloudspeakers/495469549/
http://www.flickr.com/photos/audiovoice_hornloudspeakers/497119051/
http://www.flickr.com/photos/audiovoice_hornloudspeakers/497119057/
ore this Audio Note Mid-Bass Horn specification sheet, witch probably would work fine for your driver too, so you can diy:
http://www.flickr.com/photos/audiovoice_hornloudspeakers/472612411/
i did not hear goto drivers yet, only ALE drivers and Audio Note drivers ( formet YL ) with silver diaphragmas, at Kondo San's factory. Mid Bass of his system was effortless, transparent, dinamic, and somehow soft sounding and warm. I did like it.
rds Angelo
Ok Angelo,
I will look over all the info you`ve sent. I`m glad to hear you liked the Ale mid bass. Good luck with all your speaker development projects...
they look very nice. BTW, Romy the Cat shut me out of his site because he somehow got it in his head that I was you. Strange,strange fellow.
Dan
hi Dan
he excluded me and start to hate me because was not able to handle emotionally when i spoke clear text abought his behavior in this thread :
do u really need this kind of language ?
http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=3869#3869
Angelo
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