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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The AA guy with name Kloss runs on side a company “KCS loudspeakers”
http://www.kcsloudspeakers.com/
I do not think he does anything with his company. He is known for years helping other DIYers like himself to make theirs loudspea...
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I am not sure that there would be an audible advantage to the larger feet, but they sure do look pretty nice!I know that Mirko makes such feet, as well as feet for the motor unit. Unless you love machining, it might be easier to buy from him. I was w...
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I have a couple of queries relating to the transition from the mouth of the S2 driver to a horn generally, and to a 400Hz or 250Hz horn specifically. The profile calculator that I use for tractrix horn (horncalc) does not take into account the de...
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more info about this horn from AA:http://db.audioasylum.com/cgi/m.mpl?forum=hug&n=107444&highlight=edgar&r=&session=These horns are an alternative to my 150Hz Tractrix. They are 77Hz, 3/16 mouth front horns with a conical shape. This ...
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[quote user="op.9"] One thing nobody has mentioned is using the room’s corners. Is this a no no? I’ve been trying use McBean to model a horn exiting into the corner – with a middle ‘mouth’ about 1m squared - and using a conical approximation as the r...
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[quote user="RonyWeissman"]I heard the Audio Note AN-Es, they were pushed back into the cornes in specially prepared room and they wer very interesting. Dynamics were world class, cellos were extremely hairy, piano left hand was tremendous, everythin...
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YL 75000 has heavy phase plug indeed , rca style (see sketch) while 1250 ( I never had one) gets a fixed metal dome equivalent to spherical piece on 75000 and rca plugs without conical shape pointing the exit of throat. Ironi...
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It is interesting that S2 phase plug, if to look at it from throat, ends up with round-head bolt. The head of the bolt has a channel for a flat-head screwdriver. This channel should introduce an asymmetry into a perfectly symmetrical phase plug and i...
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Steve Schell and I are currently using Le Cleach horns in our system, The more I listen to them, the more I like them. They sound slightly less directional and beamy than a tractrix, and overall an extremely pleasant sound. W...
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Up to the first fold the horn is somewhat conical as seen in post #1 picture.This picture shows the exit w/ additional angle wall (making for "corner" loading).This has a greater (uncalculated) flare something like a compound CD horn.Resonant F unkno...
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Since in my new house I will have no room height limitation I am consenting to replace my 250Hz tractrix conical horns with 200Hz exponential horns. I think in this horn I will be able to drive my S3 driver lower and will be able to pick more of the ...
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I use a direct radiator monopole for below 650Hz, this is OK and I have it working well. I think that I want to control directivity so that I can stop floor/ceiling comb filtering which gives me problems of +/-6dB and more. Now I am using extra monop...
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[quote user="skushino"] • total horn length (incl. back chamber) shall not exceed 1,00m • the horn shall have conical approximation of a hyperbolic flare contur with m=0.6 • the horn shall have a 5/16 mouth size of a free space horn •&...
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Hi rowuk.Shark skin decreases the formation of vortexes in fluid flows over surfaces and thereby reduces drag.Shark skin resembles fine sand paper and has actually been used as such.Of cource there is a difference between a stady flow around a shark ...
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Lets look at it...http://home.planet.nl/~ulfman/"The
carlson is a broad band resonator" - hrm... It does ocour as
elegent solution on first looks but do you wnat a broard band
resonator coupled to the end of your midbass horn? This aside it doe...
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Ah Romy, did you not know that the old JBLs, RCAs (and possibly S2 as well) all have an internal flare rate of 160Hz? This is but one reason why I'm asking Martin Seddon to make me a pair of 160Hz horns......just had a look; it may have been 180:http...
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[quote user="eduardo"]
YL 75000 has heavy phase plug indeed , rca style (see sketch) while 1250 ( I never had one) gets a fixed metal dome equivalent to spherical piece on 75000 and rca plugs without conical shape pointing the exit of throat. Ir...
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Andy, is conical shape and the flange around the moth is just the rational for cheap manufacturing? When a horn acts s a transducer the flange is not a positive thing… It would be very interesting how you select horns characteristics for your microph...
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[quote user="slowmotion"]I hope anyone interested in JMLC horns read the last four links, where Jean-Michell writes about his reasoning for his horn profile.[/quote]
Yes, Jan, tanks it was interesting. Unfortunately the words means little in ...
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Kids, do not let kids to subscribe the popular audio-freakish myths of the records spinning people about “the extraordinary beauty” of the Denon cartridges. Yes, the myth has some reasons: many more expensive cartridges are bad, very bad for th...
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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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I find this project so fascinating. I find it particularly interesting because one of my first experiences of good sound involved a field coil driver. Many years ago my grandfather bought an old hammond chord organ(predates the b3 and other...
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Yes, also I'm worry about the fully precise production of platter. The sophisticated conical spindle hole gives reason for serious concern. Probably I will take out the spindle from bearing to obtain the right data for maximum fitting.
The raw mater...
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As another of the contributors / perpetrators i have to chip in too.It's my Raal's, S2's and stands that can be seen.Great project and fun to do and as Adan says it opened some eyes. Others seemed to have little or no time for it, as it is incomprehe...
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The 4 sections are done. The last one is not glued yet. The reason what we assemble the section and then glue them is because the section have complex 3D geometry with all 4 sides are under specific arc. Yes, that is right – even the side of the horn...
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Romy,To clear up a few things about the Kilimanjaro RCA1428 clones.The B&C DCM50 is a modern, neodymium clone/copy of the RCA MI-1428B. It was designed and built by B&C in Italy after Bill Woods of AHhorns talked the CEO into it. The DCM50 is...
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Sucks! I made today my conical prototype and loaded it with S2 band-crossed at 500Hz and 900Hz. Pretty much wherever I placed this horn except directly above the tweeters it screwed imaging. To mount it directly above the tweeters does not look...
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Some thinking about Romy's Injection Channel (see the following thread) : GoodSoundClub - Romy the Cat's Audio Site - The "Macondo Ultimate" MK-XXVII, Revision 432 ... brings me to a question that I've had a for quite some time: When aligning a "norm...
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Here are a couple of measurements of S2's (not taken at the show).Both are taken at the listening chair, ear position in my system.This one is on a 2nd order passive, spec'd to cross at 1.25KHz.(This was Coco's S2 with new surrounds on a Le Cleach 55...
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I think that I saw someone offering a silicon nitride thrust plate along with the ball bearing years ago. Jam, your solution of simply flipping the thrust plate upside down makes perfect sense, but I suppose a silicon nitride (or similarly hard) plat...
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