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That old bug returned. Sometimes creation of new threat not going to work. The replies still work. I will fix it soon.
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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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hi rony!sorry for the late reply, my job....i did not start to build the horn, working on a phono stage for a friend. will start to build the 60hz horn in about 2 months. all calculations are done, should be no problem. will be made of layers of plyw...
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dont know the correct english word for it.fibers in one direction(layers, not curved), just hold together be threaths, not woven. will try it, maybe it works, maybe not. if the whole thing is rigid it should be ok. i dont go crazy over it, just want ...
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i thought we talked about horns and ways to build it...sorry!best regards, klaus...
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whats your favorite sound machine? just to get an idea....cheers,klaus...
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hi jezzie!i was planning to to make most of the fibers 90° to the axis of the horn, have some time to decide(but not too much, the 515´s arrived at vienna-airport:-)what to you think of using biaxial inlays(fabric visible, then -45°/+45° and the...
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for me its a nice little help, just to get a feeling how horns behave. but i did not modify hornresponse(would not be able to do;-), just changed volvotreter´s xls -horncalculator a little bit. you have to paste the values of hornresponse to the xls-...
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i dont think its necessary to use that much expensive fabric. i will use only 1 layer of a nice looking fabric on the inside of the horn, then a cheap heavier layer, then foam.maybe i´m wrong, but as far as i see it, the whole thing has to be stiff o...
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its easy to calculate with hornresponse, it can calculate the horn with exponential flare on all sides or with 2 flat sides or with "uniform flare on all sides. you can choose width-height of throat and mouth. if you wish, i can mail you the modified...
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its still expensive, but birch-plywood is not that much cheaper. its around 30-40 €/sqm. the only experience i have with a carbon-foam composite is from making a skateboard for my gf´s son. looks very good, but whats more important, ab...
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hi jessie!why you dont make it from carbonfiber on a foambase? carbonfiber is much easier to work than glassfiber and of course gives stiffer boards. im also just working on a "surfboard" horn, but i make the bent sides with layers of depron boards a...
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hi jezzie!i think, in case of thunder its only the "crack" that comes from the lightning, the "boom" is just the "echo". maybe this is interesting for you. as we can see, not only bad electricity destroys good sound, its also the changes in the air i...
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hi wojtek!i know, with the 160hz i may run into problems. i thought about making tractrix horns or maybe go for 400x-over with the 204´s from martin. his price is really good! i would cover the horns with something, maybe sand, maybe plaster.lat...
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romy, you said, you would place a 60hz midbass on the side, is this still your opinion? of, course i found no other solution in my small room. will do it the way you suggested, 60-300, 300-1000(thinking about gpa 288h(s2 is too expensive for me), may...
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everything is there!was so focused on searching s2 and midbass i did not realize that you gave macondo a seperate section.was slightly off yesterday anyway, my friend crashed my motorbike, wanted to ride it to italy next week:-(anything wrong with a ...
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i do it and i did it, but as a newcomer you have to sort out all the infos...not that easy!
[quote user="Romy the Cat"](This is normal, I have written about it many times. Those large bass drivers have a lot of inductance in Voice Coil, the inductan...
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it would be nice if somebody who knows a thing or two about mathlab and pspice would develop a accurate model. in pspice one could include the crossover in the simulations....when i tried your recommendation with s2 and 3uF cap my "basshorn" ref...
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just got it that you meant the diameters,of course its around 65%. i always calculated the throat-size with the area....i really would like to get a second pair of s2´s but i think right now it would be difficult even if i had the money;-(((if i go f...
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jezzie i used this formular for throatsize:St=2PIxFSxQesXVas/ci, m very close, my horn is just 2" shorter.it would not be a big problem to make it longer, but in my small room every inch counts.on the other side, if somebody with experience tells me....
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i will upload a pic.i have no problem with an additional channel!1.)i dont have to build it right now, the 60hz-horn with the s2 mf and 2405 hf will sound quite nice(at least i hope so;-) and i have something to build on.2.)i prefer to do things by m...
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hi romy!i opened the s2 some nights ago, to me it looked different, but i will check it again, maybe some reflections really fooled me. i searched your s2-guide very carefully, the one in your pic i would without doubt identify as a clear suspension....
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[quote user="jessie.dazzle"]Hi Klaus,
Spec sheet on the bass driver you plan to use here: http://www.greatplainsaudio.com/downloads/515_G.pdf
[/quote]
got it, thx. used this data to simulate in hornresponse,looks very promising. but i know...its ...
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[quote user="Romy the Cat"]Hi Romy!
The 515-8GPH were in same scale as the 515G with slightly above 35Hz resonance frequency and 103 sensitivity - a very good candidate for 60Hz horn. The 10” throat? No bolls to go for 9”, how about 8”? ...
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first post, hi everybody!plan to build a midbass horn around the gpa 515-8ghp, throat 9,9", mouth 24" x 39,37".945something sq inches.(excuse the strange numbers, metric units in europe)crossed at 500, s2 alu diaphr.(is it normal for the metals to ha...
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