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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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This is a good example of a CNC horn. This is the Carfrae I was talking about. MDF Upperbass horns are made in sort of the same way, but you do have to cut the angles on the Lathe. (or leave the steps like a The thing is it is not really tridimensi...
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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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I am keep listening my just two channels: MF + upperbass. They sound good and I know this sound VERY well but there is one phenomena that I can’t explained/ in the old room my upperbass went to 95Hz-100Hz. In this new room it doe 140Hz BUT subjec...
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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="Jorge"]Using the Fane 8M is interesting mainly if I get a better sound, Gravitas and size![/quote] Well, the “promised” the gravitas and size but it need to understood that it will not be coming from fane for from extra length of the ho...
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While I am waiting for the attenuators I worked on the frame and changed it to a metal frame.It is sturdy and height of the channels can be adjusted in both axis.Romy, may I learn what your crossover points for your channels?My midrange channel is be...
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Ok, since you people stop to drop the euphoric saliva around the Goto subject I think it would be worth to outline my interest in Goto. Not only worth but I kind of feel an obligation. I feel that my site surprisingly has become a resource that ...
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Here are some photos of Martin Sedon's 204Hz and 340Hz Le Cleac'h horns, which likely have more reasonable shipping charges and fit through doorways, etc. better than the 160Hz version. They have a T-factor (expansion rate) of T = 0.8, which was reco...
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This is funny and depressing at the same time. Two readers of my site sent me unhappy emails informing me that my latest posts” “A typical upperbass horn mistake.” was juts my foolishness. Whatever they said boils down to following:
1) They do...
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[quote user="Romy the Cat"]The biggest problem that usually people face when they listen the middbas horn is that people tend to make the middbas horns too short. In the short horn the driver shot right through the horn and the LF go not “get loaded”...
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[quote user="Jorge"]I guess it would be simple enough to add a couple of inches in order to bring the throat down to 4" in order to try the Studio 8M. I have already reduced it temporarily to 3" in order to try the JBL 2490h compression driver. ...
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By “midbass horn” I’m talking about a horn with about a flare frequency of about 60 Hz, to use with Fane 8” drivers, to start with.
(Was planning to use this horn from wherever it sounded best, trying for around 80 Hz to ~35...
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Saturntube, thanks for the explanation. I thought that HR2 was just inspired by RCA but it look like it direct copy of it.
http://www.audioheritage.org/vbulletin/showthread.php?p=117046
I never heard the RCA LC-9A but from the fa...
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[quote user="cv"]On the matter of the DHT having a plate resistance of 500-700... you do realise that running the 6E5p with an unbypassed cathode resistor is giving you an effective Rp of about 12k, right? The formula is, IIRC, Rp + (mu+1)Rk.[/qu...
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Yes, this English pace did not give a lot of new information. I know nothing about the AudioTekne Company. I like that they wrote about their bass driver but I do not know how much truth and the actual results behind it. I do think that they wor...
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[quote user="tuyen"]This is my current 4-way GOTO setup. I know it is in no way optimal but I am interested to find ways I can improve it's layout.
GOTO SG-38WN woofer in 360L onken cabinetGOTO SG-505TT mid-low driver with Azurahorn AH-160 ho...
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[quote user="be"]Actually as far as I can see from the picture and trying to estimate the location of the drivers in the horns: The 3 front horns are probably time aligned, meaning the drivers are lying on an circle with the center at the hight of th...
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[quote user="haralanov"] I’m still in the world of direct radiators and I’m looking for the ultimate midbass channel solution. At this time it’s still impossible to build a horn of this size so my purpose is to find the next most good sounding soluti...
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Ah, I see, they claim cobalt magnets only for tweeters… this sets everything to be more understandable. Those TADs should be replaced in those speakers in such case – but it would be shame to do it paying $150K for the speakers. In fact for $150K the...
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At the beginning of this thread I said: “Show to me your middbas solution and I will tell you how your playback sounds”. Continuing to stress the domination importance of middbas-upperbass I would like to bring some illustrations and let you to make ...
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The idea of using this type of midbass horn seems good, but I don’t see a solution for time alignment of the horn with the other channels. You have a freedom to physical align it if it is placed in the same vertical plane with upperbass mouth, but th...
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[quote user="anthony"] Briefly, I tried altering some operating current on
the valves and now have a better understanding of how DSET can be used to shape
the sound. It is one thing reading about it but another thing entirely
when you turn a knob...
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What a wonderful project. A true display of imagination, guts, and craftsmanship all the way.I am interested in knowing the material that you made these out of. Is there something I should know before I cast my upperbass horns? I've read you mentio...
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Rony,
I am not exactly understand what you are trying to do and what kind of cabinet are you trying to attach in the back of that horn. Perhaps I misread you. There are two types of Altecs 515: the G-like and B-like – they are very different type o...
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I have seen Beyma rewrite their specs when they redo a driver and even add a letter to the driver for that change, even if it is the same driver.Now I have seen variable FS responses form different drivers of the same model also. I was joking with a...
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[quote user="TonyB"]Romy, what are horn flare frequencies of your horns? I understand that both are Tractrix. My guess is that the midbass is 125Hz with a sealed rear chamber and 4" throat. Correct? [/quote]They tunes for 115Hz and pushed in room dow...
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Hello, Ulf.
Interesting. The TAD1201H is 12-incher with resonant frequency of 50Hz. It has relatively low resonant frequency for 100Hz Tractrix midbass but you most like used 10” thought and consequentially shorter horn. The shorter horns beam...
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[quote
user="Murataltuev"]Yes, back chamber is very small. And it is
tunable! So, I need 110Hz Tractrix...ok[/quote]
You might tune the Fs by using a acoustically semitransparent
fabric, like Audiotechnica does in their headphones. About the si...
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No, I'm afraid not. I think the upperbass is perhaps some new production (Mike Harvey) 15" Vitavox Alnico item and I think there is a TAD unit behind the brass trumpet but I don't know which one. You'd need to ask. I think there are various options...
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Well, it unquestionably much better, still I am afraid that they are trying to spread one ass across two chairs; I will talk about it in the end. The change from what was before was around the frame and upperbass horn. It looks like the guys are tryi...
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