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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Audio Federation have publish some images from the Silbatone room at CES, even it is in their new idiotic format of the “magazine” but they still visible.
http://spintricity.com/445/public/Vol1-3/page182
What attracted me in the images is to see wh...
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[quote user="Murataltuev"] Now it is
clear! Thank you, Romy!Today I auditioned and measured GOTO with closed hole in
back chamber. Mid-bass completely disappeared!
With closed back chamber it works efficiently
only from 200Hz! So, I'm going to tr...
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[quote user="Murataltuev"]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...
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[quote user="pe1mmk"]Well Cat you can call me whatever you like, but you still did not answer my question. Both have a horn for highs, for mids and for lows, only the sub lows are handled differently. [/quote]
I do not think I called you with names...
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[quote user=""]...The most obvious problem is with the Bass drivers, which are left to radiate both to the front (via the horns) as well as to the rear... which in this case really means to the front!... The rear of the drivers are aimed upward at a ...
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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. I am using a 12" JBL midbass driver (~100dB sensitivity) in a 50L single driver Marshall cabin...
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If you think that Jews on Christmas only abuse Chinese food and watch endless movies then think again. Since obnoxious stolen Christians my beloved Christmas tree a few years back some of the Jews torture compression drivers during Christmas’ eve...
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[quote user="ulf"]A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound. The improvement was so clear that A/B testing was not needed. [/quote]
For wha...
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[quote user="Paul S"] I remembered a host of "old" drivers from my past (not old at the time...) that, if memory serves, sounded rather muffled and slow, with humped response[/quote]Yes, Paul, that's exactly the way they sound in their original condi...
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[quote user="Romy the Cat"]You do not see any explanation is because you are not accustom
to think about explanations but wait that explanation will be brought to you.
Here is a homework to you: provide answers to the following questions:
1) Wha...
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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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This connection is the only connection that my horn will have. From one side it will be back chamber with hard-attached first section. The first section is very critical as it has a transition from 7” round throe to trapezoid of the rest of the horn....
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[quote user="noviygera"]What is that round yellow thing in the right corner of the picture? A driver of some sort? [/quote]Yes, they are Fane 24” bass driver with 24Hz primary resonance. I am waiting for the final sound check; the final is long time ...
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Jessie is correct about the forcefulness of the expansion of many over-the-counter foams, like generic Great Stuff from Home Depot, etc. In fact, many homebuilders were having problems with the foam they put around door and window frames, etc. durin...
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This weekend if I have time I will be doing the testing of my driver deciding which one I will be using. The framework of testing will be the following: a single driver, closed at 150Hz first order, mounted in infinite baffle and working along with M...
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[quote user="JJ Triode"]Romy,You refer to the D minor concerto as a "piano concerto," but wasn't it originally composed for harpsichord, like all his other keyboard works? (Except organ of course.) Anyway, I have a harpsichord recording of the D...
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[quote user="MochaMike"]A stereo three way horn system with a dual concentric 15" woofers backloaded to 50 cycles and front loaded with a short round tractrix horn 200-800 cycles handed off to the concentric 2" com...
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Roman, first of all I feel good about your bass horn that's what i have always bin dreaming and if i get the space for it wont even waste a minute :)I think you already know it or using it ...You mentioned using a foam in back chamber so it adds a ...
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Ok, the attic is all prepared and ready is host the horns. I installed the final 14/50 drivers and put in the first layer of foam. I do not like the result. With the large death of the foam that need it will take for me weeks to pile a layer by layer...
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[quote user="Romy the Cat"]. What was your resonant frequency after loading? The 416 are 25Hz drivers, after loading and with two drivers it might be deep in teens. From the picture it looks like you keep the back chamber of extra large space, or eve...
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The back chamber are installed, the horns are fully assemble and ready to be hoisted tomorrow. I will go to bad today playing…. Here are a few shots for history as if it fly tomorrow into attic then it never will be seen. On the last image you might ...
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What I think I would need is microscopic pneumatic valve that I would be able to stick into my back chamber and that would have a little-bolt that would allow adjusting the diameter of the leaking “port”... Sure, it would be fun to have the valve to ...
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A few questions. What driver is it? It looks like it is 15 Vitavox, is it 151 or 15/40? What the resonant frequency of the horn and driver with no back chamber? The most important: how the hell all of it sound. I do not be believed that you did not h...
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What is the purpose of having the flexibility to re-configure from straight to J horn?This thing will be large and massive enough that physically moving it from one configuration to another will be difficult and require a lot of effort. Conceptually...
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Moron it is then...Anyways, seeing the back chamber of my midbass horn, you would say that its way to big, no? And you would recommend me to proceed with a similar tuning process as you describe in this link?http://audio-db.info/AudioDB/BazaPraktiki/...
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[quote user="green heron"] I'm happy with my results midrange on up at the moment, but I'd like more slam from the midbass horns. The backchamber may be a bit too large, so I'm planning to experiment with the cabinet volume. Do you have any su...
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That's horribly disappointing for now but I think Jessie is right.Firstly, as you essentially said, I wonder if the horns are coupling into the room such that you actually have much bigger devices than you thought... you are actually sitting inside t...
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[quote user="Romy the Cat"]1) The foams from back chamber pushed itself through the window of basket and touched the driver cone. Sonically it is very likely but knowing HOW I did the thing I think (hope) it did not happen. Also, both horns hav...
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Eduardo,
Thanks for your thoughts and illustrations. I also do not feel that loosely-suspended very small metal cone might be a right solution for midbass. To develop LF you need pressure, pressure is surface by exertion – there is nothing els...
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Thank, Manolis, it did address some concerns. I think I even know what you did with the MF driver. You were able to get 50Hz out of this looks like horn? This is impressive. The boundaries-loaded horns sometimes allow doing away with the horn siz...
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