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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="coops"] Cessaro will be playing …. the full Gamma system at next years Munich show….[/quote]
Since I promoted the Cessaro Gamma to be a contender for the most promising commercial loudspeaker I would like to pass a few critical co...
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Romy,
More to come soon but a couple comments regarding bass horns ( and one on Tractrix horns ) :
The Edgar Seismic subwoofer ( 18" JBL E155-4 hyperbolic-exponential folded horn, 40 Hz Fc ) works very well in my room - much better than the 1...
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Ulf, are you still around?
I would be interested in an update on this project.. are you listening to this setup a year later?
I have a pair of these same drivers (TAD tm-1201) sitting new in boxes and trying to determine what horn profile, tractr...
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Paul,
Thanks for the comments.
I may have come up with a way of making the BIG horns fairly painlessly.
I found a place that sells large sheets of urethane foam in several thicknesses and several densities.And, Its no big deal to find a place that...
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[quote
user="jackydai"]My basic point is: the flare rate has to be coherent
right from the entrance of phase plugs. In this sense, not even Bruce and Sam
did it right, I’m afraid to say. In many cases the driver and the horn are
designed by diffe...
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Well, when we are talking about Cogent we need clearly differentiate two things: the Cogent’s drivers and the Cogent’s installation. The problem is that since Cogent’s drivers are something so called “compression drivers” then their performance might...
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the sad truth was the space, the finite funds, and the available bms pucks! the sad truth also, i suppose,the lack of available, and sensitive horn users to bounce off of!i could probably see what your dislike of the bms stems from-- i tried to...
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I'd put your sub horns above your head. There are some big issues with that but you save a lot on concrete engineering, and assuming space remains in future you could apply what you learned from the overhead wood horns to a more refined bass setup. O...
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Romy, Our bass driver has a 12v field coil motor, it developes just over 20 kilogauss flux density using a low carbon steel pole piece. The exit diameter is 4 inches at the moment. The diaphragm is 6 inches in diameter and mad...
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Honestly, we're gonna have to start calling you Romy "magnetar" Bessnow if you keep changing your mind like this...*My S2s all seem to measure completely differently, will have to get some more accurate and careful measurements done I think with...
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[quote user="Kerry Brown"] Yesterday a friend of mine brought over a CLIO analyzer and we graphed the impedance vs. frequency. I was surprised that the subhorn measures like a ported box tuned to 50 Hz ! [/quote]Yes, this all is very explainable. The...
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Thanks Johan, I got my SG505's and S150 horns, my throat piece is a lot longer than the one you showed above. Why can't they just sell that little screw... along with lots of other "why can't they"...Anyway, I just reread this thread and I can m...
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Romy!Put on an engineer hat!
Time-aligned is an impossible task from my point of view. How can one perfectly time align different drivers? Align to what precision? mm, inch, cm or ft? 5%, 10%, 30% time align? Align to the tip of the cone or...
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Romy,you did not disappoint my expectation in your reply. Who can argue with the take: "bugger off and do some home-work"? On the other hand, when looking through that "Knowledge tree TM" it's more of a "forest" as far as horns are concerned. So it's...
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I do not know what is meant by “close bottom” or “open bottomless”-- please expound?I do not know of importance of enemys death to this topic. There is a long thread in the subwoofer section of "devil audio" about tapped horns. John mentioned gettin...
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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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Romy wrote:"...Let pretend that you play a normal some kind of horn with a lot of air in it. The air drives the driver impedance down..."I'd like to understand this; correct me if I'm wrong:As soon as the membrane of a horn-loaded driver starts t...
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[quote user="Romy the Cat"]
[/quote]In my new room I would like to accomplish my long objective to get for Macondo a new Fundamental Channel. I would like my Fundamental Channel to employ 170-180 Hz slow-opening horn and to use a driver with 350-4...
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Herman,
What you describe is fine. Over the course of last years I had a number of people who report identical things to what you do. Even if you change volume of back chamber and move resonance frequency then sound will change but it most lik...
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I'd like to ask if anyone sees and appreciable problem with the following.I'm trying to arrange a 4-way, 3 horns sitting on top of a big bass box. As I have it the 42cm midrange horn (800-8k) is in front of the 95cm lower midrange horn (250-800hz). T...
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Another very quick post - I have guests arriving from Japan in a couple of hours. Will respond more thoughtfully when I have some free time.University Dean plans: Mouth - 1080 in^2Throat - 78 in ^2S(d) - 132.7 in^2Compression ratio - 1.70Path lengt...
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[quote user="MINGSU"] Time-aligned is an impossible task from my point of view. How can one perfectly time align different drivers? Align to what precision? mm, inch, cm or ft? 5%, 10%, 30% time align? Align to the tip of the cone or middle of the...
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Ah yes, sorry - that wasn't remotely clear. The drivers I have played with briefly are S2 and field coil RCAs, both have the same 1.5" throat. I was referring to my initial impressions of the sound on Martin Seddon's 160Hz horn (T=0.8 JMLC). Previous...
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[quote user="Dresden"] ... two J-shaped horns back-to-back, as though it were a mirror image. --the drivers do NOT share the same throat, but instead each driver loads its own horn. I'm sure the 'picture' is now clear, correct?...If...
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My approach of the Mid/Upper bass horn and design decisions have been pursuant to a specific acoustic performance target first, quality of construction second, and cosmetic appearance of the finished horn the third. (I believe I was clear in a ...
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scooter, that was a whole point – to see if the fundamental dilemma of the those designs was addressed. Frankly I was prepared to see some kind of interpretation of unity horn, not just blunt lock of any efforts in this direction. As is, the Vittora...
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Roman,[quote user="Romy the Cat"]Last year the speaker was presented by “Horning Hybrid Perikles” importer who told me that they demonstrated: “3-ways loaded into the same horn loudspeaker”. I asked him to explain what dose it mean “3-ways loaded int...
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I have finished both big horns enough to listen in stereo, and the throats are now much smoother.I'm not using the MF horns, and have been listening all night. It has been a remarkable experience! (well, the inner-me objects and claims there's nothin...
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[quote user="Romy the Cat"]slowmotion,
I think the ultimate length of the upperbass horn is 3”- 4” throat. With longer horn it would be very complicated to time-align it as the horn will mask out the MF driver. The ultimate driver for upperbass s...
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Very, nice thanks, ulf.
I never heard this company and it is good the more horny newcomers pop up her and there. The epoxy carbon-kevlar and glass fibers staffed with damping? I wonder how more fun would be if they staff these hollow horns with sand...
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