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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Number one, that I'd like to run by you guys due to it's simpler nature and closer to reality execution is the idea I have been thinking about. No first hand experience with any of this.Say we use something like altec 1505b multicellular horn that sh...
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[quote user="Romy the Cat"]Anyhow, I did the measurements today and what I saw shocked me. Of the ULF sections has nice 20Hz at MF level then they have +12dB at 60Hz level. That explains everything but it also absolutely clearly indicates that the se...
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[quote user="el`Ol"]But when the frequency where the dipole acoustic short circuit "kicks in" is clearly below the Fs of the driver, everything "dipoly" that can happen are rear wall reflections with the wrong phase, and that danger is also reduced b...
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[quote user="steverino"]I agree that the published curves don't look bizarre for a box speaker. [/quote] Hmmm, I would like to note that my reference to "given topology" did not imply the "box speaker". Even a multichannel box speaker might have opt...
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[quote user="Paul S"]You have mentioned that you want a much larger enclosure for your oops unit. I was then wondering if you aim to merely broaden and/or lower resonant response or if you planned to in some way tailor resonance as it rela...
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[quote user="Romy the Cat"] CO wrote: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.
I did it. Any situation ...
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[quote user="Paul S"]Greg, I have written about my "DEBZ" speakers several times at this site, [/quote]D. Olsher's Basszilla -- of course! Sorry, Paul, I forgot.[quote user="Paul S"]If I were to do the DEBZ concept right now, I would tune the BR...
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Let's say we all have a midbass horn that plays down to 80Hz. I know some of us are special, so their midbass horn plays down to 40Hz. But still.What to do for the lower frequencies? Sealed or Infinite baffle (that's two good options). Now we need a ...
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[quote user="oxric"] I have always felt that if I went for a vertical array of 10" drivers, I would keep the drivers closer spaced than you do in your 'Dunlavy' made enclosure. Based on the 110" height of the tower, I see that you would be doing this...
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The Aura
1808 had free air resonance at 24Hz and required enormous sealed
enclosure of 14-16 cu feet. Wilson Audio used the Aura 1808 in their
unfortunately-ported XS subwoofers and soaked from their relatively
small enclosure an extra 19dB...
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Hi there el Olyou are on the right track. (I know your post is quite old now, but I just found it today when I googled my own site).I am the one who invented the Polyepicell cones of Kea Audio.I bought the patent papers that Mr Podzus made over 60 ye...
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[quote user="Romy the Cat"]Andy, my mind does not operate by the categories you employ, I rather think about nature of Sound not about harmonic/non-harmonic distortions. The whole subject about the distortion is intricate, not to mention that it is n...
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[quote user="Murataltuev"] anthony wrote:This configuration should give somewhere around 109dB @ 20Hz from 15w in room with cone movement of about +-3.5mm. That is still low excursion, and they are excellent drivers. Well, in this case, I also hav...
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Hi Romy:No need to reach for your medical glossary. The medical condition that I call 'Imponderabilis Neurosis,' is only the preserve of highly disturbed individuals such as myself (Hamlet seems to have exhibited symptons which are highly indicative ...
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[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...
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[quote user="noviygera"]Number one, that I'd like to run by you guys due to it's simpler nature and closer to reality execution is the idea I have been thinking about. No first hand experience with any of this.Say we use something like altec 1505b mu...
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I have been playing around with speakers for a long time, and things started snapping when I got into horns. I have a system right now with an upperbass horn from 140 hz turned form MDF up to around 700 hz, to another horn, and another and a super t...
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[quote user="Romy the Cat"] I do not think that the fluid is a big deal. I think the fluidness of the isolation is the key, I would use different liquid. In my past I tried silicon and Scotch Whisky and the result was very good. Would it be possible ...
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Yes, of course, I was using 20Hz as some reference only. It's Fs of the ScanSpeak. Tannoy is the only active speaker so all power comes (or not) from it. From your experience with Reds, where does its reasonable output end?
Like...
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Edgar, very very nice observations re the phase! Can you somehow share the movie? Shouldn't there be a second phase jump around Fs of the passive radiator?
Have you tried combining sealed subs running parallel with Dannoys? I.e. ...
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OK, maybe I got too zealous with the notch filter for the Reps. I aimed to bring it down 6 dB at ~2.2k Hz, using .47 mH and 10 uF against 10 Ohms for the notch, with the Reps itself at 7 Ohms. Right now, drums are too backed off, there is no "hair"...
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[quote user="noviygera"]Romy,What was the reason you were not happy with the last version of your midbass section? THe one with two Vitavox 15" per side. [/quote]It was not a last version
but rather a temporary test version. I used in undersized sea...
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[quote user="Murataltuev"] I understand all
disadvantages going digital.
I strongly believe that minimal influence to the signal is the most important
aspect. And influences in digital domain are usually terrible. But I'm not sure
what other...
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[quote user="Romy the Cat"]Did you try to buy a cartridge, recognize that you do not like something and to try to return it back? Good luck with it.I think in today would we lost the battle for cartridge QA and we need to knowledge that the industry ...
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[quote user="Romy the Cat"]This is all because you are a primitive person with very simplistic and amateurish understanding of many things. You need to learn from much more sophisticated people, of cause I mean myself. Take a look: I do not run like...
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Thanks, LBJ, I ma slowly getting into where I would to be in term of understanding, at least it is what I think I do. You are perfectly identified what I am shooting for: "its not a musical instrument but it won't piss me off", it is exactly what I w...
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My project to add 3 one-stages channels to Super Melquiades look like progressing (it means I will have the new 15,5:1output transformers very soon) and in context of upcoming changes and, after long consideration and some tests, I desire...
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Alex, I do not remember already the volume of those boxes, what is the deference? Thos drivers have an average sealed Qs and Fs I believe 19Hz, you might easy to circulate any volume you want. I slightly overdamped them, as usually, form where they s...
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Well, it took almost two month and much more money then I thought but I was eventually able to get very decent sound out of monitors. The SL600 sitting on my “fundamental channel’s” tripods did not do well as I told before and I was forced to s...
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The Western Electric L-9 in Munich was/is an infinite baffle design. The 754B woofers are in a sealed enclosure with a front horn. There is no possibility of cancellation between front wave and back wave of speaker, so I wouldn't call it an "open baf...
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