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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Guy, I know what you mean; this phono stage really should not work well at all. I mean, voltage doubler, 3 stages of 12ax7, feedback, cathode followers, garbage looking power supply shared tubes for stereo...mortifying isn't it! These ...
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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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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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[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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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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[quote user="Paul S"] Didn't you first become aware of MF "problems" when you got everything else working better via the PP2000, and the MF wound up dropping back to weak sister status with respect to system-wide PP2000 benefits? [/quote] The PP2000 ...
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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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I never was fan of the Oris 150. They meant be used with Lowther type of drivers, that never worked properly. The Oris 150’s upper bass is not really the bass that might be obtained form the Oris’ mouth. Should this Oris has twice smaller throat and ...
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Very good! It is very interesting how you will find the 834PT. Even in stock version (but with OK tubes) I found it demonstrate some interesting qualities. Do not use the 834PT output attenuator of you have one on the unit and make sure that the ...
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Yes, the main system often seems to require too much of an "investment" to make using it worthwhile, or even realistic.I confess I have let my mind wander in this direction:http://www.amazon.com/s/?ie=UTF8&keywords=a5+audioengine&tag=googhydr...
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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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[quote user="Jordi"] The secret is the K-Horns with ALL the mods!!! If you heard it you wouild know what I'm talking about! . [/quote]
The K-Horns were Klipsch’s attempt to do something more or less reasonably sounding. They were doing K-Horns...
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Well, Daren,there is a huge difference between the 1.200 sq feet and 12.000 sq feet. The 1.200 sq feet is a good size room the 12.000 sq feet is good size concert hall for a couple thousand people…. So we are back to a sane listening room…. :-)Intere...
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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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My man, I am convinced that all you need is time (OK, and money...), and soon you will be dividing that time between full-tilt Beowulf in your lair and spending the ticket money you've saved (clever you!) on La Tache&nbs...
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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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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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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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With the Japanese Yen devaluation, stuff in Japan has gotten very cheap. Like 50%+ cheaper vs. USD in the past few years. This, combined with the fact that shipping charges generally drop rapidly for heavier packages would make me look at potentially...
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[quote user="miab"] I'm curious as to why the preference to paper cones as opposed to carbon/poly/kevlar/ceramic/.... With weight and stiffness advantages of other materials, would advancing technology not be well implemented towards drivers? [...
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Tim, the cable loading is not what I meant. Purist does like higher current across the cable but which cable does not love it? Dave Clark described very well some of the aspect of usability of POD cables (like disturbance). Some of them he left out. ...
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Hi,[quote user="Romy the Cat"]....obtaining the same extreme results by the different means, although I do not know yet if it is possible….[/quote]My point exactly.[quote user="Romy the Cat"]Also, that 9.5" woofer to do well 3000Kx and to do well 40H...
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"Best bass" is of course a matter of opinion based on experience and expectations. The (original) Hartsfield LF driver is certainly "designed for horn loading", like the Vitavox AK-151, whereas the AK-150 and the JBL D-130 are designed to be direct r...
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