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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I usually go with turns ratio. The ribbon tweeter has I
think x175, the 6C33C full range is 10x or 12x and 6C33C in DSET is whatever it
was – it is kind of irrelevant in DSET setting. The YO186/PX-4/RE604 I think
has x25 transformer. My loading nu...
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Paul,I know the capacitance -- this is an analog of impedance of ordinary speakers.I also compare to known serious designs, like mentioned Blue Hawaii.The multiple taps on PS iron is to accomodate different output tubes. The "bypassed transformers" a...
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[quote user="serenechaos"]What is the difference between "distortion," and "harmonics?" --what I'm asking is what you are defining as "distortion" and as "harmonics" in this context.
Yes, I know as in how a sinewave of a note contains no har...
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Here's a thought experiment...pick up a couple of chinese orange crate cellos - for example .. http://cgi.ebay.co.uk/Good-student-cello-nylon-bag-bow-ready-to-play_W0QQitemZ190084840261QQihZ009QQcategoryZ10178QQrdZ1QQcmdZViewItemlossily mount the PHY...
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I’m not convinced at this point that it is good – I need to see it more in context of everything else - but the initial results are very promising. What I do now, I keep the compression Fane 8M in horn but I very dramatically increase dumping of it...
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Mani, my first thoughts were questions, whether you want to fill the room "like headphones fill your head" or you want to aim the speakers right at your ears and "do the mixing inside your head, like headphones". These are two mutually exclusive app...
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[quote user="Paul S"]N-set, you've certainly earned the right to enjoy your gear! Again, which SUT will you use? No practical way to measure ESR, etc. on this, I suppose...[/quote]Paul, the SUT's are Pieter's Tribute MkII. I could measure this or th...
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Jessie, yes from a perspective of general horn propaganda your post it correct but from the perspective of “reading the back side of the midbass speed bump” I would argue that it has nothing to do with horn loading. Look at the notion widely. I would...
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ScottL,It looks like the two pics you posted are of different systems, the first being slot loaded PP, and the second (full-system) showing a "traditional" IB. You also seem to be confirming my intuitive hunch of potential sound benefits and horn ma...
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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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[quote user="Rewind"] The drivers we use may be superior or inferior. As long as mine are the best I could possibly afford I can relax. I do love horns, and I can probably find quite a few errors in my signal path. If they are there the horns will am...
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Hello Romy, thank you for the answers. Your horns have a round mouth, but their profile is not spherical. That is the profile of the Avantgarde Horns you formely had - apparentyl you have anayzed them intensively, could you elaborate what problems yo...
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The throat diameter of 7" is what I first approximated as an acceptable size, with the 4" being an alternative (should some unwanted effects arise, I may then experiment with the 4" throat). I can't simply assume 7" will be correct (though that...
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Antonio,
Bruce Edgar sells an excellent all front-loading horn system, the Titan, which works well in small rooms. He will sell you unfinished horns, and you can find/buy the drivers yourself if you are a DIY guy, or on a budget. Considering the...
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It is difficult to talk with audio people about Horns. It is a constraint problems, and not only in audio, when the mistakes of a specific poor implementation or a chase of a mistaken tangentional notions might shatter an entire concept. The very sam...
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[quote user="Jorge"] Once you have an Upper Bass Horn working properly with a good driver inside it, and getting at least 6 db extra output out of the loading (I just wrote about 2 pages of technical difficulties on this but let’s just stick to the s...
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[quote user="guy sergeant"] It may be asking too much to expect the LF horn to play well up to and beyond 250Hz. [/quote] I would expect this horn to go much lower, let say doe to 150Hz. You if it was a front firing horn without loading to a boundary...
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[quote user="rowuk"]Wiki and google are not the best, but is a start:https://en.wikipedia.org/wiki/Compression_driverMass related horn issues:http://www.positive-feedback.com/Issue4/edgarinterview.htmhttp://volvotreter.de/downloads/Edgar-Show-Horn.pd...
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A friend has a fixed headshell model S2 and is about to trade for a detachable just for convenience but worries if there is any extra sonic merit in the model he already has?Any idea Mr B____p.s. Romy, I've got my 901 and I'm very much impr...
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R1 (green/brown/orange or yellow/violet/orange) needs to be paralleled with a 12k resistor to bring the loading seen by the cart to just under 100 ohms.
Brian....
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Ok, once I got pin 8 connected to pin 1, the curves came out straight. Here is the true pentode plot at 200V screen, 0.5V/step:[img]http://www.hagtech.com/blog/images/7788-04.jpg[/img]And here is my new data sheet plot for triode mode:[img]http...
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[quote user="de charlus"]Ok, understood, at least somewhat. Are you suggesting that the S2 operates at the frequencies between 1000hz and 3.6khz? I am not insisting upon using the driver at the frequencies that I was initially suggesting; far fro...
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[quote user="Blaukopf"] First, Romy describes his horns as spherical. Later he names them tractrix. Are some of the profiles of the spherical wave profile? [/quote]
Yes, they are spherical, wish means not rectangular. ...
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Rowuk, first of all, I very much recommend you do not undertake the Paul’s advice and do not go for any implementation of bass with bigger drivers or more driver of different topology of bass section like OB and so on. For sure better bass would ...
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[quote user="Romy the Cat"] I know at least 3-4 other people who very much like me bough in the Koetsu hype and bought the top of the line Koetsu needles. All of them hate it. The point that I try to make is that if the vintage Koetsu were so good th...
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[quote user="Romy the Cat"]
I never had a lot of trouble with high transconductance tubes. I use the EC8020 a lot. Stefano, you might look into this EC8020. I never seen it but just looked into the datasheet and it looks very interesting tube and i...
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[quote user="Jorge"]If you put the Melqualdes in the basement you can put a smoke detector very close and maybe a camera and a monitor to keep an eye on them.NOw you cold also make a statement piece and put some sort of medieval looking cages around...
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He did note that the ML2.2 uses a different OPT, and also that it uses "less feedback" than the ML2.1 (which AD owned for several years). I wonder what this means, "less feedback"? Why would Lamm mess with that very effective scheme? Does he just ...
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HE, you've gotten a long run so far without anyone asking if you've read the site. Have you? There are long threads on the Lamms and the Lowthers that might offer you some food for thought. One thing I would recommend is playing with the ML2 "plat...
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N-set, of course the finish flooring is supported by some sort of structural "members". These MIGHT be reinforced concrete, and so MIGHT be quite strong, depending on the whims of the builders at the time of construction, and considering any loss of...
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