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Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I am quite fascinated with the result that I might get from MiniME and at the same time I am defensive with the direction it takes. Anyhow, here is how it stands…
The decision to go for MF driver was I think right one. Even the 70-20RX tweeter has s...
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[quote user="coops"]Ralph and Thomas are friends there would have been no price premium for the field coil option …[/quote]Considering that Cessaro claims that they pay for $500 worth TAD drivers (OEM) over $5000 then I might only imagine how much pr...
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One of the main advantages of Macondo configuration was the fact of multi amplification. As with any other systems which have a dedicated amplifier of the same type to each individual driver Macondo can run over dynamic range with amazing ease th...
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[quote user="MINGSU"]GOTO always recommend to use 1st order active crossover and 2nd order passive crossover. The reason to use 2nd order for passive crossover is to protect the driver. Of course, the user can use whatever they like the best but the ...
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Cat:First off, the Silbatone Aporia is $30k/pr not 100k. You could do 6 speaker surround with Aporia for well under $100k. Hope you feel better now."So what," I say. $30k is already too much for my pocket. I am on a fellowship this year and cheapskat...
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Yesterday I spoke with a guy at a Russian audio forum who reported that he played with addressing many problems of compression driver by pumping ferrofluid in the gap. I am not a big fun of ferrofluiding generally and in case of compression drivers i...
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[quote user="Romy the Cat"] ygoh wrote: 1.) Why is it that you do not support using teo compression drivers in the same throat? Is the distortions increases, such as wavefront distortion? Sure the wavefront gets spread; it is what Wi...
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[quote user="Romy the Cat"] Make an experiment, and I will simplify the case quite assertively. Take a typical compression driver, cross it at 800Hz, second order and load it into a proper contemporary horn (Tratrix or JMLC) of 300Hz. Listen that hor...
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[quote user="rdrysdale"]Our bass driver has a 12v field coil motor, it developes just over 20 kilogauss flux density using a low carbon steel pole piece. The exit diameter is 4 inches at the moment. The diaphragm is 6 inches in diameter and made of a...
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All that I will be saying are the subject of my own experience with horns and my personal observations. You shouldn’t agree and most likely you will not. That is fine with me. I have lot of reasons behind what I will be saying and opened for some cla...
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Hey Boys, Remember even if you use a modern "pancake" compression driver, you still have no control over the flare rate the manufacturer used within the phasing plug. And most of the time they are not willing to tell you, or they don't even know...
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[quote user="MINGSU"] Since they are very old pair of driver, I will recommend you to send them to GOTO Japan to make sure the driver are up to the spec. so you can be sure …. [/quote] Ok, but then they need to send them to me then in order I inform ...
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Yes, Ric, thanks for posting it. I have seen it a few years back, in fact I was searching for the images but was not able to find it. I think that fellow was ether Japanese or from Sound West Asia, I do remember already. It looks like it is 20-3...
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[quote user="Wojtek"]It should not be a problem for you to borrow one of those plastic 150-200 Hz horns for your REPS .[/quote]I heard it a couple of times in a different settings several years ago. Although I was interested in the application ...
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TAD TD-2002:I have been evaluating these without horns. Essentially, listening to them without the horns, but also with original horns. No difference, as I will describe what I am hearing in both configurations (applies to their high frequency reprod...
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Kea Audio, Regarding the driver. When I meant hard suspension I meant low excursion. Acoustic pressure equals displacement by volume and displacement equals surface by excursion. In horn we add the horn EQ, so for a given frequency we might have lowe...
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Hello all :::: This will be my first post, and I am writing first to thank Romy and the lovely Koshka for making the results of their research available to others, and also to ask for help :::: I am something of a "New Horns Guy" (cringe !), as I am ...
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Vitavox S2 does OK up to 12.5K ("strong, clean and in character") on it’s center but I never use this driver pointed directly to me but rather at good 20 degree off. (I hardly can tolerate any compression driver point directly to me). At my angle the...
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Romy:Going back, you said:"Vitavox S2 does OK up to 12.5K ("strong, clean and in character") on it’s center but I never use this driver pointed directly to me but rather at good 20 degree off. (I hardly can tolerate any compression driver point direc...
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If I succeed to make my midbass horn at attic then I will face another problem that I do not know how to address at this point. The horns will be powered from Melquiades bass channels – it means it will use a good 70 feet speaker cable. If I go with ...
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Hi Skushino, hope you dont mind me jumping on to your old thread, but I can upon it while looking for ideas re chamber volume and compression ratios for the same Faital driver into a 160hz Azurahorn. Could I ask how you were using yours? Ta,K.S...
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Some drivers have a rising db curve from low to high frequencies. The horn may help with flattening the FR. If the FR of a given coaxial compression driver is flat, I would agree with your conclusion....
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It is very easy to figure out acoustically. Feed the drivers and their crossover with a reference tone of fixed amplitude and fixed frequency, roughly in the middle of crossover point. Disconnect one of the drivers and measure the acoustic pressure e...
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[quote user="zako"]THE ONLY COMPANY THAT HAS ADVANCED THE DESIGN OF A MODERN DRIVER IS JBL,,, GOING FROM THE WESTERN ELECTRIC DESIGN TO THE 375,,376...PRO VERSION 2440,,2441... TO the 2450 types..USEING COHERIENT PHASE PLUG DESIGN TOPOLIGY that unit...
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OK, I like this game. Why not dream of a very wide range driver, say, from 300 - 12 or 13k? Maybe a bit larger diaphragm and less "compression", along with a faster horn, could do the trick? Some sort of ??? for the beaming. Shoot for 6 dB X/O "...
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Romy, I think you have neither a system with back chamber now (because the foam is closed pore), nor a "true compression driver" (because the foam is not rigid). Probably you mainly have a second vibrating system coupled to the cone that enhances mec...
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Gordan, I think you are missing the accent of what I meant to say. The Class A or not is not important for compression drivers and the S3 in particularly. I mean it is important and it much be ONLY class A but I do not see any SS amps switching in cl...
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[quote user="Paul S"]Thanks, Scott L. I get the math, and no doubt hearing is believing. Still, I do know for certain that "a driver" can be influenced by a defined amount of trapped air in an enclosure, at least as far as the sound that comes from ...
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[quote user="Murataltuev"]So, the question is still opened: how to get 300-400hz.[/quote]Perhaps give the JBL 2169H a try. It is supposedly very good from 300Hz to 2.2kHz, but I have never tried it. Use it in a sub 200Hz tractrix horn with a 4" thr...
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Here is where I stay with my enigmatic Remedios project. I build inside of top box at resonator that I tuned 50-60 hertz. So basically it is under two square foot enclosure with a port tune at the bottom of resonance frequency. The port is shooting ...
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