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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="martinshorn"]The bass horn for the ak151 is housing a rear chamber slightly open, giving the injector channel - that creates a lot charme, flavor and „heart“ but also 3 dimensional projection. [/quote]I need to say that that very muc...
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[quote user="Romy the Cat"]I do not understand what does it mean. Are you saying
that you lost bottom response with closed exit hole on the driver back? If with
the closed drift from back you have a (loaded!) response no lower than 200Hz then it i...
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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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Maybe, some people would be interested in what I am doing with my system. I have been continuously listening and sparsely making changes and letting them sink in. For now, I feel more settled and think the biggest obstacle for me in reaching the ...
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OK, now I am happier as I did my duty and the back chambers are ready to be attached to the horns and to be lifted up. Yesterday I spent 5 hours trying to build the back chamber displacement that Jessie and my carpenter recommended me. I bought t...
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I changed the new flash at my site to “Ok, the midbass horn project is successfully over. Over 3 months, over 400 posts, over 180 pictures… all publicly available…” The project started physically on July 16, 2010, ended on October 28, 2010. The prepa...
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[quote user="Paul S"]Romy, is it a goal to make the horn strong enough to raise one end or turn it without having it fall apart from its own weight?From your earlier descriptions, I expected to see at least one continuous piece of plywood bridging th...
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first post... but I recognize quite a few friends here.. so, my straight horns... I like them very much.. I built mine similar in style to what Greg B linked, but obviously much smaller.. mine are just under eight feet long (length of a sheet&nb...
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Paul SI don't have vinyl playback at the moment. My source is an MSB Platinum Data IV transport with transport power base, fed into a Metrum Hex dac. The amp is an Ars Sonum Filharmonia. So there isn't much of a power drain. Also: cabling is...
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Just to answer a couple of question and post some more...
The Mouth changing sectors in the horn, according to the preliminary data posted here, would be as follow:
For the 40 hz horn: 4¨ Throat to 6¨ = 53 cm
...
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[quote user="Romy the Cat"]
[quote user="tuga"]I can't find a/the post(s) where you describe the advantages of using a 4 inch throat. Stereo-lab makes both 4 and 8 inch throat 140Hz horns but I don't think they could make an 8 to 4 inch adapter... [...
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Got the ultra low DCR toroids coil and pit them in use. Yes, it was very right move and they a bit trimmed the midbass tail. Playing with inductance and listening how the midbass decays (measurements are worthless in this case) I ended up with 4.8mH ...
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Hello again, Romy... friends.. cats...
I am sorry for my delinquence in replying... but the good news is that in the past weeks I have managed to get a beginning Goto system together... more on that in a minute..
first, basshorns... the bassh...
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A few weeks ago Amphissa sent me a collection of recordings of Myaskovsky. I knew Myaskovsky, head his Sixth Symphon, “something else” and his cello concerto but to have a pile of selected CDs by a great aficionado of the Myaskovsky's music really he...
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Back to the subject of this thread!
I heard some rendition of Dr Edgar's gigantic monsters at the Montreal
show this year (2006) running with Modwright electronics, some 16 wpc
tube amplification (possibly SET). There was in that room also...
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I would like to ask for your thoughts on the importance of back chamber shape and construction. This topic became of interest when I learned that the back chamber of my midrange horn (250hz - 2khz) is noticeably resonating when I put my hand on i...
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I except suggestions and critique. I live in Turkey and I am not living in a city, I live at the coast. It is not possible for me to go and experience most of the stuff first hand. There is no one really interested in horns or have multi-way horn sys...
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[quote
user="Murataltuev"]I did some experiments today again with GOTO in my
existing horn and it is obvious for me that I need different horn for GOTO.
[/quote]
Here we go. Now you got it.
[quote
user="Murataltuev"]Existing horn was mode...
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Pierre, yes, I understand it. It kind or irrelevant what they destined for and yes, in domestic applications in context of low power we can use it lower. What I am saying is that as we do use it at extreme low range we deal with slightly overdamped d...
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[quote user="jp"] I assume a simple hole sealed with silicone would not suffice given the amount of pressure build up in the rear chamber? [/quote]
The pressure that builds up in right rear chamber is truly enormous.
[quote user="jessie.dazzle"]… a...
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[quote user="RonyWeissman"] I have the 515-Gs If I remember correctly, and I am trying to find suggestions on what is proper horn-loaded cabinet still. And I agree my tannoy golds so far have worked best with early 70's mcintosh 22...
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[quote user="Romy the Cat"]
Well, it happened with me, one of my HH of my DAW, or as they call it “music server”, went down. It does not recognize by BIOS anymore, suck, it would be costly to recover data from there. Partially the most important f...
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Last couple month when I rebooted my DAW it has difficult time to start up; it looks like motherboard is going and bias sometime during boot does not see hardware. Usually with 30 min and 10-60 automatic recursive attempts the machine boots and t...
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Do proper horns "suffer" from K2? Do you not think that the back chamber loading is part of the engineered concept? Are you sure that reflections from the room that travel through the horn to the diaphragm would not cause more trouble? How can yo...
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Here is an article by Leonard Norwitz that I think some of you might find motivating. I do not know Mr. Norwitz but it sounds like dinked too mach Qvortrup’s coca-cola. Anyhow, although I do not agree with some (sometimes many) of the Mr. Norwitz’s c...
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Now the same graph black...
[url=http://abload.de/image.php?img=esdsubhorn4uo9p.png][img]https://abload.de/thumb/esdsubhorn4uo9p.png[/img][/url]
...
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[quote user="guy sergeant"]Can you remind us how & why you arrived at the resonance frequency you have set for these drivers in this particular horn?[/quote]
67Hz is the resonance frequency of the complete back chamber and driver loa...
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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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I have been observing these phenomena for years and I have no explanation for it. Not that I requires any explaining, BTW…
Pretend that you have a stereo installation where right and left channels produce absolutely symmetrical acoustic output. A sl...
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Paul,
I have been working with trumpets since 1966 and horn speakers since 1975. I have built both and am pretty familiar with what they are, the similarities and the differences.If I had to pick THE major sin when thinking about all of the horns th...
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