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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Romy the Cat"]
OK, now I am happier as I did my duty and the back chambers are ready to be attached to the horns and to be lifted up. Yesterday I spent 5 hours trying to build the back chamber displacement that Jessie and my carpenter ...
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[quote user="Romy the Cat"]I mean the driver from 14Hz to 150HZ gas absolutely linear impedance as it has no active load. I look at all of it and felt so tiered and I walked out if it. I think in the new room the horn is shooting into the wide open s...
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Romy,Thank you again for a helpful reply. Your comments are very appreciated inspite of not suggesting what to do. I will figure that out myself. And here is what I've learned so far:>> Herman, if you use Precision Devices hen you are at mid-hi...
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Ok, I have hired a contractor and run the insulation between the space where will be the horn and the roof. He laid the plastic channels that still will allow air convention between the horn and roof. Ironically while we did it we devised a program t...
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The back chamber will be revised when we do there.http://www.goodsoundclub.com/PDF/RomyTheCat_Midbass_Horn.pdfThe Cat...
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[quote user="jessie.dazzle"]Do I understand correctly: AG used Fane 8Ms in the Trios upper bass horn?[/quote] Oh, no! AG in Trio’s upperbass horn used similar 8” driver with 103 sensitivity. That driver was bad and it made me to look for a replacemen...
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ygoh wrote:
1.) What's that formula to calculate the back chamber volume given a throat reactance?
2.) Would it be a bigger back chamber with higher reactance at the throat? or vice versa?
You do not ne...
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I really would like the Vitavox users who use the bottom region of S2 driver to pay very serious attention to my post above. The redaction of compression in this driver and dropping the resonance frequencies does impacts the lower knee sound of the d...
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Hm, very different and very opposite result, interesting. Are you using the same S2 diaphragm as I do – the metal suspension? If yes then it would be the only one explanation that I might come up with.
Sometime the compression drivers with horn form...
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They mention an intricate back chamber for the high frequency unit, maybe thats the primary function of the tube, apart from positioning the unit relative to the rest....
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[quote user="Romy the Cat"]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 w...
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I was playing today with Stage Acompany SA 8535 Ribbon driver. It is truly 103dB sensitive little monster with crazily large 3 poll Neodymium magnet. I did listen the driver and there are some things that I like in it and there are some that I do not...
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Jessie, 45Hz horn with 6”-7” throat around AK151 driver is from my perspective is the best thing might be theoretically built around a cone driver. I really envy of you and if I had room I would unquestionably go for it; this is why I keep a pair of ...
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[quote user="jessie.dazzle"]I really appreciate the result of the 180Hz horn with the S2... Particularly in terms of "texture". It is responsible for such an important range... [/quote]
Well, if you appreciate the lower knee of the S2 driver then wa...
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[quote user="jessie.dazzle"] Could you clarify: Would you like to vent the rear chamber or increase its volume (or both)? This weekend I will try listening with the rear covers on the Lower-Mids slightly open... [/quote]
Good question. I do no...
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This is a complicated subject.
While building the horn I would need to know what the size of back chamber to make. Usually the initial size of driver diameter plus two depth works very nice. It makes big chamber that eventually might be minim...
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[quote user="Rewind"]Hi, I am slowly building my own Macondo. I understand why the injection channel is there. It brings some kind of softness that the compression drivers lack. [/quote] OK, but it is not how I feel about the service of injection...
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A few months back a audio guy visited me and after a listening session I asked him if he can report any problems with sound. He reported that he hears a slightly more prolonging decay at upper bass then what he suspect to be. I knew about this effect...
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This project just woke from a long slumber.I've been granted access to tools and people to move this forward. The tools are a large-scale CNC cutting machine and paint shop, used to fabricate volumes (large 3D shapes) attached to climbing walls at i...
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A friend stopped by tonight when I was test-listening my midbass horn. He got freaked out from the size of the thing. I played for him some Gerhard Oppelt’s organ recordings. He told me that I am crazy, like I do not know it myself. Anyhow, he made a...
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Miab, I have very limited knowledge in construction techniques, moist prevention and how all of it might affect a big horn. My very uneducated production suggests me that it is not truly a bid deal, but of cause if go this route then I certainly ...
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[quote user="ygoh"] 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? [/quote]Sure the wavefront gets spread; it is what Wilson does in his ...
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Actually it is good that you reminded me about the Tannoys as behind my recent paranoia with the “Water Drop” tweeter I forgot about the beauty that blessed my life. I am taking about the “older” Tannoy’s tweeters. What is magnificent sound!
I’m not...
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You have identified the tricky parts -the transistion between the front and back horn as well as the throat of the front tractrix horn. A one to one throat with the front horn works best with my coaxials and a short 1.25" straight 'ring' ...
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Ronnie,
The stuffing the back chamber in upper bass horn and stuffing a sealed enclosure have totally different purposes. In the firs case we need to decrease volume of the chamber in the second to increase it. The polyurethane foam spray is not foa...
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Well, I just placed an order on the 505TT and S150 horn last week... I came across this site after placing my order and now I'm worried about the mismatch of driver/horn. It seems like I'll have to either change the horn or the back chamber. Romy, is...
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Ming,
thank you very much for resonance information, it explains a lot about the SG145LD4’s suspension. Still, my primary interest was not how folks out there build 20Hz of 24Hz horns but about ability to use the SG145LD4 properly for smaller horns...
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I am not quite sure what is going on but wherever is going on is wrong. I was listening this morning Shostakovich’s second cello concerto by Berlin and Rostropovich and I detected that something was not right. It was too direct and “too stereo”, if I...
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I’ve been thinking about all this electricity stuff…
I’ve stopped using all power conditioning devices since Bush got re-elected, and I consequently left the country to start a new life in the land of 220v/50Hz (this BTW, is not an exaggeration).
...
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Looking at phase 3, one of the first things that pops out is the following:Skushino wrote:"...75-240Hz [from a] 12" x-driver [loaded into a] 70Hz [horn with an] 8" throat..."Because they are a royal PITA to make, you'll want to give yourself every ch...
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