|
|
| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
|
|
 |
|
|
|
|
|
[quote user="Romy the Cat"]I was very slightly open the back chamber of the driver that gave to me some ease at lower knee.[/quote]Congratulations you have found and use this principle, otherwise the back chamber acts like pneumatic brake for the low...
|
|
[quote user="deemon"]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 ... [/quote] Actually it would be a serial coil, as I need a low pass no...
|
|
Yes, Keith, it is how they usually do with front-exited drivers where the back chamber not vented. Some would put a texture on the plate of magnet, some put felt dampers. It look like then have some kind of indentation in there I have no idea wh...
|
|
It is really a seldom thing in audio – when people ask questions afar they do own homework and demonstrate understating and own thinking on the subject.
Question: Whan bass horn back chamber tuning should be started? &nb...
|
|
"It is not an accident that I liked the article about the “Resonating Oops” to this thread."Interesting. I'm just completing my 125hz midbass horns. And I'm deciding how to construct the back chamber. I think I will experiment with a removable and tu...
|
|
[quote user="jessie.dazzle"]Have you considered replacing the cover on the tail of your Upper-Bass horn? ...With a large-diameter circular cover, made from a more resonant material (when I say large diameter, I mean quite a bit larger than the diamet...
|
|
Romy's quotes in blue:Daniel J. Plach's quote in green:"...The back chamber mechanism is good. Are you planning to do the same in the midbass horn?..."Yes, it will be similar, but more robust; I have an idea for a locking-type seal, which I would pro...
|
|
Throat 19x19cmMouth 71x71cmlenght 77cmback chamber 18.8L...
|
|
[quote user="haralanov"] Congratulations you have found and use this principle, otherwise the back chamber acts like pneumatic brake for the lower working range of the diaphragm! [/quote] Actually it shall act as “pneumatic brake” in a compression dr...
|
|
I do not have a final design of my back chamber. The image above is a concept that I deliver to my carpenter – we will go from there to see what we can do. I certainly would like do not overbuilt the back chamber. The notion of adjustability is very ...
|
|
[quote user="Romy the Cat"] There is one more subject that most of the people are missing. I personally located horns not in-the-walls as most of people do but my horns are extended well into my room. I feel that this sounds way deferent but this is ...
|
|
[quote user="wvdave"] I see this project as enhancing the value of the property…[/quote]
I also see this project to enhance a value of property. If I place in the mouth of my midbass horn some kind of MF/FM driver then I will be able to presen...
|
|
Jessie, a few comments.
The back chamber mechanism is good. Are you planning to do the same in the midbass horn? Since you most likely will not drive your upperbass all the way down I think that the back chamber mechanism will be more effectiv...
|
|
Interesting concept but let me point out a few considerations.The diffusor does performs a mild "equalization" function if you want to call it that but it is also an aid to dispersion. It is light "EQ"...3dB might be about right. Without any diffusor...
|
|
Ok, this all need to be rectified and probably will cost me a visit of insulation specialist. Sucks, I thought that I have an internal consensus about it. My carpenter consider that Insulation must not apply under the roof but only to the rooms ceili...
|
|
[quote user="noviygera"]1. Let's say
the my original back chamber from the manufacturer is a good "starting
point". Is Romy saying that those last few hertz of the fine tuning of the
chamber volume are very important and audible, in other words th...
|
|
OK, this morning I tuned the playback and did some listing, trying to understand what was the problem. Sound was not just bad but it was very strange, it was almost as a mechanical replica of sound. I took my phase meter trying to set horns in ph...
|
|
Hello Romy,I've given back chamber tuning some thoughts and the biggest pain in the a$$ is to create a SIMPLE mechanism to change chamber volume fast while providing tight seals. What do you think about using test plugs from plumbing supplies......
|
|
Very cool, James, it would be very interesting if you put your ears into an investigation of “Ooopsy back chamber.” I was wondering about the A45 Lowther as well. The 125Hz midbass horns that you made, how big the input hole in there? The attempt to ...
|
|
As the time closing to Saturdays, the day we will be hosting the horns I am getting increasingly hectic. I am still not absolutely convinced that l placing the horn into attic would be a problem-free operation, in fact I see many trouble. My carpent...
|
|
[quote user="js"]Could anyone please advise me as to the recommended rear chamber volume for a Le C'leach horn with a throat of 240cm2, mouth of 7089cm2, length of 47cm, cutoff of 160Hz, T of 0.8? I'm thinking of using a Beyma 122Nd which has a sd o...
|
|
Jp,
what do you mean by “vent for the back chamber”. Why are you planning to make the back chamber vented? The side would be depending from the type of your driver, but generally it will be always smaller then you think.
The Jessie's impleme...
|
|
Dominik, I did not check the geometry of the horn, I am sure you did it correct. At the first approximation it looks like right numbers. Here are a few comments. 1) Please next time name the images to upload to my gallery more identifiable. The nam...
|
|
Romy, thank you very much for very detailed explanation of your horn theory.Let me present some doubts about it. From physics basics when we have more than one springs (suspension, throat resistance, back chamber) we can consider it as one spring. Th...
|
|
I do not think that anything in back chamber has to do with anything. Look at the size of back chamber and the wavelength. No reflection from there might have effect to anything. For sure the material of the back chamber affect virtual volume but it ...
|
|
[quote user="Romy the Cat"]I do not have a final design of my back chamber. The image above is a concept that I deliver to my carpenter – we will go from there to see what we can do. I certainly would like do not overbuilt the back chamber. The n...
|
|
[quote user="CO"]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.[/quote]
I did it. Any situation where sealing of ...
|
|
[quote user="haralanov"] Also instead of using electrical tape, try to seal the back of the driver with a 2mm thick sheet of microperforated tonewood and then glue a leather layer over it. Then you could also pierce multiple tiny holes in the leather...
|
|
[quote user="op.9"] I agree, there is probably very little to learn luthiers that is directly applicable. However, I've always been interested in the similarities between good speaker cones and thin lacquerd spruce. Sort of a crispy pingy sound even ...
|
|
Marcus, I have no idea why Jorge assosiated your resonance with your back chamber volume – they are absolutely not related. Why suddenly you start to talk/think about the back chambers is beyond me. Also, I have no idea what the HornResp does at my ...
|
|
|
|
|
All context of this site except the Forum's posts
Copyright © Roman Bessnow 2004-2024
All messages within the Site’s Forum Copyright © by
authors of the posts
|
|
Last 24-hours posts: |
1 |
|
 |
|
|
Total human visitors: |
42,919,009 |
|
|
|
|
|
|