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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The current suggestion from GOTO is to crossover at 200Hz with S150 horn. Of course, you can crossover higher but what are you going to use to cover 220Hz down? If you choose to use the bass horn, you do want to keep it crossover low.&nbs...
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Yes, I see the need for a phasing plug for a 40Hz bass horn. Most people choose to ignore the finer details and claim the wavelengths involved are too long to be affected by phase plug. If someone really understands the fu...
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Come on, Dominik, no one cares about the LeCleach for bass. You might consider slower opening profile: like exponential of hyperbolic. Exponential will give you a bit more horn gain at bottom and hyperbolic will give you even more gain. Hyperbolic wo...
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[quote user="Romy the Cat"]
Any LF acoustic system has two SPL levels: the SPL of pressure and the SPL of tone.[/quote]Ahhh! Very good Romy. I don't recall you talking about Pressure and Tone SPL before. The tapped horn can be designed any 3 ways....
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Hello,ich made a new construction,three new constuction featuresbass horn mouth distancemembran movement cross settingframe horn mouthFrame double horn for 8" fullrange driver,back driver again the BG20 von Visaton,also invers montage with +- change ...
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Yes, it is certain in what I proposed there is majored disadvantage of having a suspended floor. A suspended is like a bad turntable – no matter what you do you would never be able to get proper lower octave. The idea to have horn firing from ro...
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wow.thanks for comments.La Grande Castine will not be as expensive as Cessaro Gamma.i am sorry but i cannot answer to all questions, for several reasons you can understand.we have tested many drivers since the early prototype of La Grande Castine. BM...
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At Romy's suggestion I've created a new thread for this. I have been thinking about what sort of bass solution to use with the S2. I was hoping to be able to get the S2 low enough (c. 300Hz) to make this a bit easier, but it seem that onl...
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Here's a pic (link) of my listening position.When I built my large Bill Fitzmaurice bass horn...I had thought about placing it in that space above the speakers, firing into the corner. I may still do that...but the sub is serving duties in the separa...
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More mid bass pics.Note - I will bulk up the horn wall thickness considerably, by adding another 2-3 layers of MDF and/or Ply....
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I saw and hear thise horns on audio show in Waraw this month(I went 200km to this show only to hear this thing). It is La-horn 200hz, smaler horn is La-horn 1000hz not diagonal. Drivers is BMS. Bass is TL. Orginal name of this system is ROCKET but th...
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Hello again, Romy...
I totally agree with you about changing the rear chamber volume. It makes a very positive improvement in extension as well as quality. Also, I had never dreamed of a driver with a variable compliance resulting in a variable...
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Jessie,
Perhaps if you search something in the throat jungle you might fish some interesting results. You see, optimizing the driver to throat transition you might get some HF out of upper bass driver. But besides getting more HF there is something ...
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One more thing I would like to add: what if despite of the oversized throat problems we have a task (as you, NL, proposed) to use the overthroat horns (overthroat - horn with oversized throat size, let it be one more Romynizm). I think the dealing wi...
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I stopped by today in a local warehouse and picketed a 4x 16” fiber pipes and 2 two 20”. I absolutely love the effect. As soon I brought the tubes to the room and took the cover off in the hall room turned to be much quieter at HF. I did not expect t...
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I think it might be very interesting to introduce the high-pass filtration for tapped horn and to see how it behaves. It is not only about thermal overload and restriction of excursion. The unloading of none-used bass generally clean-up the transpare...
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[quote user="Macman"]Hi Romy,Its an Altec 416-8A driver in a ~100 Hz exponential horn, Jbl 2441 in 350Hz tractix, Aurum Cantus G1 tweeter and Eminence Definimax 4012 HO in ~30Hz Tapped horn.I just hooked it up and the highs are promising but I though...
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Luc,
I am not ‘lucfm’ and I hope he will reply to you but I would like to pass some of my observation that you might find useful.
In my past when I discovered Fane Studio 8M I went over a number of 5-8 inches. At that time I used AG’s Trio upperb...
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[quote user="martinshorn"]So thinking stereophile was there thursday... [/quote]Reichert mentions Saturday twice in the article. Not that is really matters. He did not like them, the youtube video sounds horrible but you heard something interesting...
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About the resonance. This was exactly why I asked. The electrostats drivers have very light diaphragm and through react of those diaphragm from a large horn will have much more critical effect then with a driver that would have heavier rand more rigi...
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[quote user="Vasyachkin"]the only real questionable aspect here is adding a second set of back firing, inverted phase horns. mathematically speaking it is what the design "needs" but of course the real question is - what does it sound like ? that's...
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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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Trying to explore the upper bass channel reaching up to a Victor Sierra 360 Hz horn with an Altec 804 with a 4 uF oilcap, I first used my OB Supravox 215, then a B&C 8" woofer in a large BR originally used with EV 15" (the latter not good) ...
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Hello Angelo,
Even though it may not be a good idea to use a phase plug in a straight Upper Bass horn, I did find the information educational, and just wanted to thank you for the link. Thanks also to Romy for his comments on the subject.
The d...
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[quote user="Stitch"] Well, I didn't come so close to answer your question right.I saw a few from the German DIY scenery and for them it was like the return of Jesus, best sound on Planet But probably they are still deaf as usual, because the Fre...
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Hello,late, but my experience shows,most construtors didn´t understand simple diagramslike the real and blind part of a expo bass horn,so they take the flare rate not low enough, they take the wrong enclosure material, like PA,and they wonder it ...
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I am actually doing the bass and ULF with different modules and amps. My bass modules are the dual tad boxes driven with their dedicated monoblock solid state amplification. The tapped horn is working for ULF only as it is crossed at 30hz with 18db. ...
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Yes, the crossover looks fancy :) More than that it does the job. The vacuum caps are only for the tweeter and the upper-mid beryllium. Still they are bridged with micas as they wont do much alone. Adding vacuum caps smoothens the transitions and sou...
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[quote user="Jorge"]Now if you design a TH for 70 hz, you can use it from 35 hz up to 140 hz, and that could match up to your 142hz front Upper Bass horn. With this solution you completely eliminate the need for a Folded horn midbass channel, that ...
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Hello Romy!I just listened to this system http://www.hornfabrik-eder.de/index.htm which has an 8" Görlich in the upper bass horn and I couldn´t find anything "inherently faulty" about > 4" without compression. The kettledrums sounde...
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