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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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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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[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="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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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="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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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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Romy, I think you have neither a system with back chamber now (because the foam is closed pore), nor a "true compression driver" (because the foam is not rigid). Probably you mainly have a second vibrating system coupled to the cone that enhances mec...
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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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Hello , Roma ! I think that you can use only a back chamber with decreased size , and a serial capacitor . I think that there are no ways besides ... Dima...
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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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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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[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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[quote user="Romy the Cat"] ygoh wrote: 1.) Why is it that you do not support using teo compression drivers in the same throat? Is the distortions increases, such as wavefront distortion? Sure the wavefront gets spread; it is what Wi...
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[quote user="Merlin"] If they are modifying conventional drive units by hand, the labour costs alone can be prohibitively expensive. The fact that they are using heavy Alnico magnets and coating the diaphrams suggests that these units do not co...
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Ronnie wrote (and posted the following image): "...I was thinking the same. But perhaps rubber rings can be used to seal the back chamber to make it instantly tune-able (without the hard foam)..."Romy wrote a thread called the "Practical Guide t...
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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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Thanks, Eduardo, very interesting. The YL 75000 has no phase plug and 70Hz with 1” trout. It look to me like a conventional diver. Which beds a question: if to reduce compression with our classic drivers, loose plug off and reduce power then can we ...
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I see, this is very different question then you initially posted.
Ironically the subject was discussed years back what I was fighting with S2’s “fuzziness” at very top.
I still do not feel that there are any 'rule of thumb' in it, there are...
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I had a number of discussions about ribbons loading into horns and I generally do not welcome this idea. There are a few reasons why it never work properly and one of the most convincing is that in order to develop enough output from a ribbon you nee...
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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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[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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[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="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="msaudio"]
Romy If you would thank about what you are building and what it does, you would grasp the concept of my thanking. You have a 7inch hole on your bafflle with your woofer on the back side of it in a sealed box. The only...
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