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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Ah, Amir, did you consider ever that amount of pp generators can create a critical mass of them which advertly affects sound? With all seriousness I hope you do not use the bulk of your generators in the same environment at the same time. I impor...
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Hi Daniel. I mean the window, after you sweep 10 seconds, and fuzz shows the IR. You can change the IR windowing on the preferences panel... like crop/cut the analyzed part of e.g. 1ms before the peak and then duration X behind the peak (here i asked...
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ah come on guys. Measures have to be understood properly. U can’t judge every tiny pixel. And also you cant say a tilt here will sound bright or dull, coz your room can change this. Ok. Doesn’t mean everything is upside down either. Doesn’t mean, if ...
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It was an interesting event today. I have a big air compressor home that got broken, so I borrowed a portable electric compressor from my neighbor. I plug it in outside the house and blew up the irrigation system, preparing it for winter. Then I bro...
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Romy,I understand your situation as a result of the move. It is a good thing because a system that is out of proportion with not work in a family environment and ultimately you will be battling yourself between sound and family priorities and practic...
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Haralanov, I've spun this thread off the "Speakers for a Powerful SET" thread, as you suggested. I took a couple of pictures, but I can't figure out how to upload them, just yet. I'm also not sure what you could see from the outside, anyway.As for th...
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[quote user="Paul S"] I took a couple of pictures, but I can't figure out how to upload them, just yet. [/quote]Hi, Paul. Take a look here http://www.goodsoundclub.com/Forums/ShowPost.aspx?PostID=1120 [quote user="Paul S"]I took out the phase plug, a...
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Zako, you might enjoy the thread about the evils of hysteresis induced by output transformers, where the (so-called)absence of output transformers is supposed to be the "solution". In any case, your posts remind me of this gambit, more than a little...
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Not to be too presumptuous but i thought i'd start a thread that could serve as a repository for lowther comments, ideas etc.the impetus for this was that rola experiment i mentioned in the cogent rmaf thread. I was thinking hmm, 'hard', 'shouty' tha...
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Just how important are subharmonics and undertones in audio, and how they affect tone? I played around for a while with the Townshend supertweeters, this is a ribbon tweeter that you can barely listen to: you plug it in and put it next to your...
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My main 6 speakers are modified Edgar horns with 105 dB/ watt sensitivity, and the others are overhead emotive speakers with standard 90 dB/ watt sensitivity. There are two JL self powered f12 subs, and 4 self built subs with a sherbourn five channel...
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I have seen those old Telefunken, Siemens and some other 4” cone direct radiation tweeters, but I never tried them. I do not know thier signature and I do not know thier characteristics. The reason why I never cared about them, although I might be wr...
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In reply to those who asked me to post the detail pictures of the Vitavox S2’s phase plug.
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Unfortunately its $1000,- total... Its not fixed, i can still do alot with that though.Alnico is better but only available in vintage drivers right? How does neodymium compare?The Jbl's seem to fall off fairly quickly. I dont need flat to 20K b...
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Something they mustve obviously done better than others using beryllium. Judging the sound. In a positive way. The lower 3 are titanium, but all upper 3 are 4/3/2 inch BE sourced from truextend. The suspensenion however is soft and allows excursion.I...
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[quote user="Romy the Cat"]Folding introduce a bunch
of resonating chambers and cost audio coloration in most of the cases that do MASK
OUT the transient dynamics but folding itself should not have an impact to dynamics
itself.[/quote]Might be the...
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Josh, I am not sure what you want to say. If you looking to name the reason why you like the sound of Gotos then you are guessing as much as anybody else. I can tell you even more. I very confident that the Goto folks themselves are guessing. I do no...
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Romy,
Thank you for your response. I am trying to figure out this horns and I did additional measurements. The phase plug is an interesting part of forming of the the horn throat expansion and because it is quite big and so looks like it is al...
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Hello Romy, thanks for your guide.I've been thinking and I feel that some basic upper bass channel ideas are forming; they a result of, as you say ,"organic" derivation from the rest of my acoustic system. I am pretty excited about this idea i have. ...
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http://www.aries-cerat.eu/
(Curiously, the "Contendo Reference" is not listed under speakers but has it's own tab)Seems to be primarily an amp maker looking to branch out into speakers and custom audio installations. The image of the "Contendo...
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I need to say that I do not like the Netherland-based company BD-Design. They do in my view non interesting products and their owner Bert, despite of being a more or less knowledgeable audio fellow have a tendency to patronize incredibly filthy audio...
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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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[quote user="mats"]Good start Dan!The JBL phenolic 2" driver is 2482.I would lower the crossover point as far as you dare, 300Hz or so.Now the 2226 will do what they are pretty good at.Later you will likely want to filter the 2445 around 2k.A 600Hz h...
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Romy!Put on an engineer hat!
Time-aligned is an impossible task from my point of view. How can one perfectly time align different drivers? Align to what precision? mm, inch, cm or ft? 5%, 10%, 30% time align? Align to the tip of the cone or...
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[quote user="MINGSU"] Time-aligned is an impossible task from my point of view. How can one perfectly time align different drivers? Align to what precision? mm, inch, cm or ft? 5%, 10%, 30% time align? Align to the tip of the cone or middle of the...
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All below is written by Thomas Dunker
Yeah, "sound consistent independent of signal level" is a very precise way to sum up my whole speaker philosophy. Anything that is assumed to be constant, but which actually changes with signal dynamics is what ...
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Hey Romy,
One rather simple acoustic solution would be to use a quarter wave
stub. This is about the closest acoustic analog to an electrical notch
filter. I believe JBL used this trick in their 'Aquarius' speaker
to remove a peak in the ...
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[quote user="cv"]This is but one reason why I'm asking Martin Seddon to make me a pair of 160Hz horns...[/quote]Another problem….
Chris, be carefully with those large 160Hz horn and S2. The guys who make then have no instruments to center the mounti...
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[quote user="Romy the Cat"]
clarkjohnsen wrote:Folks, in case you care to learn the truth of the matter, AC Polarity is the subject of Chapter 7.5, pages 63-66. Its connection to acoustic polarity is established there too. That Romy should so boldl...
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Bill, when you were at my place I use two PP2000 running together as at that time I did not discover the effect. I was running my MF at -2dB and my tweeter at -1.5dB. As now I use one unit and I return back my MF and HF channels to the level as they ...
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