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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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 would like to share some ides what I would like to do in my monitor project. This are just intention and I did not try to put it all together. Probably I will do it with the next few weeks.
I’m planning to use the Celestion SL-600 enclosure ...
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There is an ancient Hebrew proverb saying that if you have problems and go sleep. Last night as I connected the new assembled Remedius it was so bad that I indeed went to sleep, hugely disappointed. Had an ugly dream, wake up and immediately see ...
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I had yesterday our technician to make a first pass over the Mason and now it is eventually is in tune. It is become playable I have discovered a interring challenge. As I said before the acoustic setting for the piano is perfect in out listening roo...
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Could anyone here get through the whole spiel? I found it rough going at first and then impossible once I saw the pictures of the product. The immediate sense I could not escape is that it is (at this point, anyway) more about a "total marketing pl...
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Paul, I would not touch this beast without modeling it firstat least to see if the electron flow is +/- what I'd expect. The eventual sonics are of course hard to predict form the model FFT's. The only hints are some posts at DIY audio and few words ...
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[quote user="ayebee"] The horns that Stereo Lab make are very good, especially considering the relatively modest prices. I bought the "Ultra-Fi" version of the 140Hz horns and they are of course not completely free of resonance ….Present system consi...
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If you read the post, the reference in made to this being "in my implementation"
I have however yet to hear a bass unit that can provide the low end quality whilst still allowing a first order slope.Unless we are happy to accept copious quantities...
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Keith,
Interesting. Are you sure there are first order slopes on your speakers? Having played with those drivers I cannot see how it can be done. Or are you just talking of the electrical slope on the 4001?...
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Yes indeed. The company was originally Nova Physics and appears to have been sold on to Sam Laufer, a lawyer by profession originally who brought in Mark Porzilli of Melos and Pipedreams fame. I do not know if this company actually manufactures or se...
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Paul, l I have written about it somewhere: the passive speaker-level crossovers on bass channels are no good. Marko has 250Hz that with 3rd order would be around 10mH and 2mH. With air core then would be very large coils with huge amount of DCR – ver...
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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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It was interesting, educational and in way embarrassing. Last night I send the directions to my carpenter to redo the third section in accordance to the original plan where the opening of the sections is more consistent. This morning he took the thir...
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I.M. Distortion wrote : "...#1 from were you listen to system from you should be able to look down the throat of every horn in your system..."jd wrote : "...Hmmm......
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[quote user="Romy the Cat"]
Yes. I’m exiting to see how the new horn I shaping up. Still I do not think that it is about second orders. Obviously in context of 5 channels system, the more channels one gets then less room between them. I still feel...
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I appreciated a couple of things, probably for different reasons than Q put them forward, I think. For one thing, I more or less discount his timelines, and also the idea that certain audio components reached a high-water mark as "complete" achievem...
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First order of business is to sell them at a high price; so, if their approach and their spiel seem familiar...Again, this sort of "balanced", "ultra-low-noise" circuitry has been around in the pro sound market for a while now, but NOT for phono stag...
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[quote user="guy sergeant"]I thought the Library of Congress was supposed to have one of these, which from what I heard would do the same job perfectly well and in real time.
http://www.elpj.com/about/index.html[/quote] Yes, it was my initial react...
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Yes, a cheap inductive l-pad between OPT and S2 in midrange channel. Interestingly, the frequency response of the first order Lazy Ribbon is remarkably similar to a response you posted somewhere on this site of the Water Drop with third order filter...
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This thread has gotten Interesting. Josh, what do you say to the fact that some of the best sounding drivers with "the same specs" sound different, one from the other? It does seem to get down to how well versed in sound development one is in the f...
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Keep in mind that my crossovers are not just 6db filters. There is an impedance correction network, suited to these exact drivers in these horns. Unless this correction is there, the first order filters can not work against the rising or falling impe...
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[quote user="haralanov"] The ribbon is 100% tonally … If you use this tweeter lower than 10kHz your system will be totally unlistenable because you cannot reproduce the proper tone of harmonics.[/quote] It is pretty much what I found as well during m...
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[quote user="Thorsten"] First, the Lowther has ze wizzer cut off and has an Equalisation circuit to flatten ze upper midrange bump. Otherwise it is run fullrange, that is WITHOUT HIGHPASS OR LOWPASS. [/quote]
Probably this is why the Lowther sounded...
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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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My perception of Srajean's credibility was affected when I learned that his "first and most important spiritual teacher" was Osho Rajneesh, a man perhaps most notable for having followers who decided to murder 750 people in Oregon in order to win a l...
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[quote user="Romy the Cat"]The concept of self-testing boot cycle is nice one but it for sure could not be done during the amp booting. Some tubes do need to warm up and reach the cruse temperature in order to be tested, some do not. Some tunes (lik...
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Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above. All other channels ...
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[quote user="Marc HENRY"]hi all,thanks for your interest !yes the frame is curved, HF and MF are //yes there is a phase plug in the bass horn. This cover 80-300Hz.there is a separate infra-bass section, covering 20-80Hz.images of the bass phase p...
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My only targeted listening experience with DSP has been bad, including "modern" "reinforced" concert halls.I later found out from one new-ish concert hall sound guy that they always immediately "digitize" the sound specifically in order to "process" ...
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Romy,I took your advice and now have a single 2440 driver. At least i THINK its a 2440. On opening it i find that it has a phenolic diaphragm! Have I been sold something else? I was not aware that there were ever any phenolics for the 2440 family. Wa...
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