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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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First off, I forgot to mention an interesting observation: Before running the sweeps (previous post), since the drivers in the upper-bass horns are new, I decided to verify/optimize rear chamber volume (they are easily adjustable)... I wasn't expecti...
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First off, I forgot to mention an interesting observation: Before running the sweeps (previous post), since the drivers in the upper-bass horns are new, I decided to verify/optimize rear chamber volume (they are easily adjustable)... I wasn't expecti...
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[quote user="Romy the Cat"]How many octaves from fs? We are taking about how many fractions
of dB not octaves! Look for a threated:
http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=2991#2991
…as a good start. [...
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Marc Henry-In the 6moons write-up, you mentioned the Altec 515 re-issue not being satisfactory for your purposes on the Grande Castine horn. I presume the specific 515 variant you used was the 'g' type (designed for horn loading) rather than 515'b' ...
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Hi everyone,It is quite ironic that the day I hear from Fane telling me that the Fane 8Ms are finally ready, I should receive this update from my horn maker maestro. Russ Collinson of Layers of Beauty. Russ, if you ever read this here, please take a ...
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[quote user="haralanov"] Romy, the actual sound benefit of this 4-channel upper bass configuration, is rather in the type of sound presentation. The commonly used single upper bass horn (or direct radiator) sitting under the midrange horn, gives the ...
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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...
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I understand your point of view concerning 'vintage' in comparison to 'contemporary'. What I find the most troubling with many of the present/contemporary attempts in design is that many people claim to have a truly horn loaded system capable o...
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I concur the objective to acquire performance in the desired frequency range must predominate most other considerations of design.My objective for the design of the mid/upper bass horn is to attain effortless, smooth, real-world horn-loaded response ...
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Hi Romy,I hope I got this right when going through this long thread with LOTS of information. Did you mention for upper-bass cross-overs Elko’s (electrolytic) only to be your preference? If I have it right, any special preference at all as ...
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Yes, you right. There are some threads where I should return and finish what I started. The “middbas” section was 80% written but I abandoned it due to luck of time and a shortage of encouragement. I should certainly finish the job. I will find the d...
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Hi all
Thanks for your thoughts, Romy.
In my view the least controversial of your “THE PROBLEMS WITH HORNS” cycle. Or, to put it another way, I agree with most of it.
I'm not so critical as you to open baffles for midbass, tho,
in fact I thin...
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more info about this horn from AA:http://db.audioasylum.com/cgi/m.mpl?forum=hug&n=107444&highlight=edgar&r=&session=These horns are an alternative to my 150Hz Tractrix. They are 77Hz, 3/16 mouth front horns with a conical shape. This ...
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hi Jd*
probably u know the site of volvotreter, with quit a nice description how to built a wood tractrix horn.
http://www.volvotreter.de/roundhorns.htm
i want to built a tractrix horn with 95cm diameter hornmouth. Have u made such a horn ...
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I understand your recommendation and agree. I need to have upper bass and MF and than see how to merge fundamental channel in between.So, I better postpone experiments with compression drivers and only compare 12" Supravox in two horns: 42Hz 2m long ...
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[quote user="Romy the Cat"]Oh, God, what the measurement microphone does at the mouth
of the horn? Is it where you measure your responses? I hope not. Also, even over the bad sound of YouTube
video it is very clear at the example you provided us t...
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I have tried a second filter on the Supravox as per your suggestion. Very interesting, it really has audible effect on the sound even if it is small when I put the filter around 40hz. I will try on 60hz and 80hz and keep on listening. It will take ti...
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Romy wrote: "...I still do not know why you have weakness in 80-160Hz octave. Your upperbass shall cover it perfectly fine..."The last time I measured the upper-bass horn, it started tailing off just below the horn's physical cutoff (115Hz); lets see...
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Since having replaced the 16 Ohm drivers in my upper-bass horns with 8 Ohm versions of the same driver, I gained enough upper-bass output that it is now possible to run all horns from the 8 Ohm taps (I was previously running upper-bass from the 16 Oh...
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[quote user="Paul S"]When Etta hit certain consonants, such as a "P", the sound was so punchy up and DOWN the frequency range that I could feel my fucking pant legs flapping![/quote]
Normal
0
21
false
false
false
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Similar to the famous sexist tail that women can be only ether pretty or smart the midbass horns unfortunately behave in the very same way: they can be only nicely placed in a room or they can sound good. You want the horn to place in a specific ...
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Just a quick note.I tired a JBL 3" compression driver 2490h model with original Titanium diaphragms on a 120 hz Tacrix horn. I got a response down to 200 hz. How did it sound? It sounded good clear and transparent but it lacked a little tone imho...
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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...
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Have you considered the opportunity of raising your upper bass HP crossover? How high do you plan to use your mid bass horns? If your mid bass is comfortable playing up to 280hz (or whatever the right freq is), you can use your upper bass horn to p...
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The throat diameter of 7" is what I first approximated as an acceptable size, with the 4" being an alternative (should some unwanted effects arise, I may then experiment with the 4" throat). I can't simply assume 7" will be correct (though that...
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[quote user="skushino"]Romy, please elaborate on your experience using a 2nd order crossover. What do you mean "rules of the game change completely?" Why did you try the 2nd order? Are you concerned with damage to the driv...
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This there is the last in the “THE PROBLEMS WITH HORNS” cycle. The previous threads might be found at:
Problems with horns: tweeters.Problems with horns: mid-range horns.Problems with horns: mid-range drivers.
This would be probably the most contro...
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Listening to the horns, it seems that they indeed die somewhere below 120Hz. I was surprised, and a little disappointed that it seemed so steep. Good to hear that it's to be expected!!Yes, I'm using a 30-something-Hz 1st order high pass on them ...
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Romy,Your Macondo system is something that has been a "role model" for what I'd like my playback system to be in the coming years. And much of what I've learned about horn playback systems I've learned from reading your writing and other posts on thi...
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[quote user="haralanov"]Romy, the main driver in this acoustic system has nothing to do with the funny Lowthers. It is very high class field coil speaker unit made by Oleg Rullit. The owner of the system has tried the highest class of the Feastrex li...
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