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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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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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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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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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[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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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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[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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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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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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I use a direct radiator monopole for below 650Hz, this is OK and I have it working well. I think that I want to control directivity so that I can stop floor/ceiling comb filtering which gives me problems of +/-6dB and more. Now I am using extra monop...
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What impedance is the SPU working into? My recollection (10 years since I used one) is that it liked to see a very low impedance load. I would expect puffy, diffuse low frequencies if the impedance was too high. I do recall that it was a very 'm...
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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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[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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[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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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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[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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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="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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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="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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Here's a threeway with the BMS coax like in your orpheans nested in what i think is a 80hz horn which is driven by 2x15"sI'm not sure how well the time alignment works. I think the woofers are a bit too far back.in any case:[url]http://www.codaaudio....
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[quote user="RonyWeissman"]Attentuators plugged directly into the RCA jacks sounds like good solution for balance control[/quote]Do not forget that you do not need the attenuators but juts one attenuator that you would plug on right OR on left. Also,...
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