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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Im in the process of building a pair of 115hz MDF horns. Any suggestions, on the size and type of vent for the the back chamber? Ive seen Jessie's implementation but I am pretty sure I will not be able to do that in my situation. ...
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[quote user="Romy the Cat"]I see some kind of so called “transmission line” that is fractured from multiple labyrinths where each of section acts as different resonant chamber… then I do not want to hear about “energy releasing and the rest crap.[/qu...
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I have seen Beyma rewrite their specs when they redo a driver and even add a letter to the driver for that change, even if it is the same driver.Now I have seen variable FS responses form different drivers of the same model also. I was joking with a...
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Decays may not be only from your horn inside mouth ...Try to treat your back chamber(whole area of were your driver radiating sound ) with highly dense materials and use absorbers too.Use acoustic dampers like rubber where your horn mouth contacting ...
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Actually if that horn would not be bending atop, go for another couple feet vertically, consequentially has a smaller throat and of course has a strong back chamber then it would be a very good J-horn (presumably that the walls and joints are not res...
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Taming strange fullrange drivers is fun, doesn't cost an arm and a leg and there is always room for a second, third, etc. system. E.g. what to do with such a ridiculous unit? http://www.ciare.com/pdf/catalogo/HX135.PDFBack-loading? No problem when th...
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Thanks for the reply. I'm using a Jabo KH-55 horn for hf/upper mid, so I think I'll have to experiment with different size chambers. Beyma quote the volume displaced by the driver as 5.5 litres, so I'll start by trying a 9 litre (gross volume) back...
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Apologies for blurredness: room is very dark hence long exposure times.At listening level. Note the driver is off, hence light at the centre.Side view. Note the larger horn can move in the horizonal plane to time-align it with the S2. Back chamber is...
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[quote user="cv"]Regarding what effects the larger horn will have: my gut feeling is that the larger air mass will provide more damping anyway. It may be that there's an optimal bug screen "density" that varies with the air loading?[/quote]This is ve...
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The narrow portion of the midbass horn is surely begging to be inside a chimney, or a structure made to look like one, protruding through the roof. I am sure birds nesting on the back chamber will not impair its functionality, though it may be a pain...
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I'll try to make some comments on Feastrex Sound in this post. It is always difficult for me to isolate the sound of the individual parts I want to analyze. Like in this thread, which has partly evolved into the effect of all pe...
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[quote user="Romy the Cat"]
[/quote] Practically all surfaces of horns are sanded and relatively good looking, I was priming today the rest of the horns. I was priming it as was thinking how much I got worse. Formerly I was listening some music at ...
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[quote user="noviygera"] Question, Romy:Why do you suggest to add the extension on the back, not the front, as B. Edgar suggested. He specifically commented that the MOUTH area is too small and said the throat size was OK?[/quote] Herman, the mouth a...
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[quote user="rickmcinnis"]Is there a consistent effect from too large/too small and how is it analyzed?
Working on a new horn that I had turned by a fellow in Hungary and have made my back chamber so that I can easily manipulate the volume b...
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"Spend a few days listening the horn and learn to hate it - it will be very over dumped"-I've been spending what.. a year now thinking that it was supposed to behave like that! :)Introducing a gap of 8-14 millimeters changes the sound from ...
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Post #34:
Goto!
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by
be
on
2008-02-15
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I shold make it clearer:The Goto was used in a Goto 150Hz horn, crossed at 180Hz.I guess that is a proper implementation for Goto.The Fane was in a 140Hz tractrix horn with a 10cm throat and a not optimised (to large ) back chamber, and no crossover ...
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[quote user="Romy the Cat"] steverino wrote:If you went to a concert with chamber music and closed your eyes how would it be different? Steverino, I think that the main difference between listening quartet recording and blind listening of live quarte...
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Hi all!I have build few horn projects. And i can't figure out how i can get rid off back chamber nasty sound (resonances) (300-500hz region).Horn is 150Hz conical with JBL 2020H driver in 14L cilinder....
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This time also make shure that the cavities in the two versions, the alnico and the fieldcoil, have the same size and volume of cavities behind the coil in the magnet structure.In this way you make shure that it is the two magnet types you are listen...
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Moreart, somebody sent me this link last year. You are surely the DIY pioneer of back loaded Manger.As you probably know this is a touchy speaker to work with. Rated at 91 dB/W input by the factory, we measure ~91 up to near 92 dB/1W/1m in our two mo...
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[quote user="Blaukopf"] First, Romy describes his horns as spherical. Later he names them tractrix. Are some of the profiles of the spherical wave profile? [/quote]
Yes, they are spherical, wish means not rectangular. ...
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I told before that I have high respect to Brian Cheney (because of multiple reasons) but I do not agree with his loudspeakers, where he tries to use ribbons wider range then they should be... Brian recently announced his new model VMPS RM V60. Since ...
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Hello Romy and everyone here, Thanks again for your thoughts on the large horns. It seems best to start a new thread, as previous threads dealing with the "10-Footer" originally began as discussions of other subjects. Romy, you may want to move previ...
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Romy,If you havent already, why not explore the Infinite baffle concept? Or a long terminated back chamber for that matter.Current drive should also be very good on the lower registers.Rgds, Collin...
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Hello Macman,Nice horns, I like that you finished everything properly! I am getting tired of seeing piles of horns.I think the ringing you are getting from your midbass horn is that the throat reactance is not balanced. How did you calculate the ba...
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I woke up and thinking about the horn problem with fresh head I am thinking what did wrong. I did not measure the frequency response of the horn – I did not see a need for it – the sound of the thing is way beyond where it needs to be measured. I dis...
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[quote user="oxric"]Hi Romy:
I have been following your mid-bass horn project with a mixture of fascination and horror for a little while and am awed by the remarkable amount of creative thinking that has gone into it.
I am sure there is n...
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[quote user="noviygera"]I got this new midbass horn to replace the Edgar 80Hz straight horn. It is made by Funktion-One and they claim it plays down to 90hz. I could not get it to play below 120Hz and I am trying to figure out why.
15" driver....
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[quote user="guy sergeant"] How would such a time delay manifest itself in the resulting sound?[/quote]
It is like driving a car where one of the wheels is larger size and rectangular.
[quote user="guy sergeant"]Would the benefits of having a hornl...
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This post is split form the thread:http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4549http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4556[quote user="jessie.dazzle"] "...I very much might try to use the metal suspension again when I will be dri...
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