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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Thorsten"]I have kept the 600R arrangement, but I cleaned up the circuit a lot. The new stuff was posted over at the AudioAsylum, not a place you are terribly fond of. If you still have the Phonostage you build it might be worth rolling ...
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Here is Thorsten’s very good article about different opinions for DHT SETs
http://www.fortunecity.com/rivendell/xentar/1179/theory/seamptheory/SEAmplifiertheory.html
Quite good writing and quite good thinking.
The Cat...
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I do not wish to violate the rules of the good sound club, so wonder if it is okay to try to contact Thorsten via email about this essay?...
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[quote user="Thorsten"] I did use the term "crappy" in the connection with the tonearm in an ironic sense. Have you lived so long among US Americans you lost your sense of irony? Also, i do not suggest crappy Phonostages, merely ones with low input c...
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BTW, Thorsten had an LCR corrector around 7788-7788T. I made in past and it was slightly tacky but still quite good… ...
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[quote user="Thorsten"]....because where humans are concerned objectivity does not exist [/quote]Thorsten, as many times we talk about it as many times you completely in denial of a very simple and very powerful thing that the human perception itself...
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I do not wish to violate the rules of the good sound club, so wonder if it is okay to try to contact Thorsten via email about this essay?...
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[quote user="Thorsten"]Not quite. What is wrong is not the Amplifier, but ....[/quote]Well, it would not explain why I never had his problem before and why the output from a good CD walkman does not produce this effect even if I listen the headphones...
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[quote user="deemon"]Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can ob...
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Lots of good information in there, if one has some idea of what it means in terms of sound and how it might be integrated into a system. However, some of the guys who are the smartest with respect to circuit design seem to have n...
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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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Hi!Actually, the Goodmans Axiom 80 full-range driver fits into your description, thanks to it's free air suspension... The fs is around 20 Hz, with a q of 0,3 and a pretty spectacular vas of some 1000 litres. The specs are courtesy of Thorsten w...
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[quote user="Thorsten"]I can now (given that this particular cat will be let out of the bag) cofirm that traditional voltage regulation even with an extra 40db @ 100HZ passive filtering remains audible.[/quote]May be it is time to review some basic c...
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Very interesting read. I like comfy!Now for ultimate comfiness: would you recommend an actual unit for prototyping?...A digital crossover that works OK, with >=2 analog unbalanced inputs and outputs, 2*3 channels output, possible 6db slopes a...
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[quote user="Thorsten"]MY PERSONAL current realisation (where I to build one) would look like this:1) S&B TX-102 as volume control, with suitable switch2) 2V Lithium Battery negative pole to the grid of the Valve, bypassed with good non-magnetic ...
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a Hong Kong-based company DIY Hifi Supply is selling RIAA EQ modules, the first modulesthat I have seen at 10kOm. It is something that Thorsten did not do commercially… but if the silks sound good then it might be VERY interesting. Is anyone kno...
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[quote user="guy sergeant"] I don't doubt for a moment that there are plenty of people 'who know' who will wax lyrical about the benefits of open loop eq in feedback circuits. There are people 'who know' who will tell me that valve amplifiers cannot ...
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Sorry, Alex, I guess I was not paying attention. If Romy or Thorsten see your post, they can help, for sure, and a few others here also use that model. I know little about this phono stage.Best regards,Paul S...
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Yes, Thorsten was the man
that made the initial modification in the EAR 834 and I need to note that it
was not redesign of any kind but juts basic modifications and admitting the unnecessary
things. Even though Thorsten is the industry p...
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[quote user="Romy the Cat"]The same Thorsten made up a new company, I think the Abington Something and they make a new 16/44 CD player. I did not hear it and I look forward to it, I will have a local guy to have one soon, – it might be interesting. [...
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hI bRIAN, [quote user="Brian Clark"]The 834P was a revelation for me, being a circuit that I would have dismissed as "old hat" (Feedback? 12AX7 cathode follower? Do me a favour!).[/quote] Me too, but you know me, i'm mainly pragmatic. The EAR 834P is...
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[quote user="Thorsten"] Well, a range of mono EQ curves (and only Mono) had turnovers other than 500Hz (AES with 400Hz comes to mind, often used by Rudy van Gelder and then there was Decca with a different turnover each year in the 1950's!). AMR's P...
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[quote user="thorsten"]Designers like Kondo San spend many hundred hours "voicing" their Amplifiers, allowing a blending of a variety of colorations together in such a way that the overall sonic impact is quite small. For many others (amateur or prof...
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[quote user="Thorsten"]Even a pair of RCA Jacks and a wire inbetween is not transparent.[/quote] T, thanks for the pitching of the 6AS7 SRPP. I would disagree with the quoted statement. I think you guys are not correctly understanding my definition o...
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Actually the approach “this is working fine because SET amp has a correct harmonic reconstruction" I find is very wrong in audio. It is similar to what Thorsten written in his compilation about the loudspeakers problems: “I'm an Engineer in the end, ...
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Keith Cooper mentioned today the AllnicAudio’s 1500 phonostage in the Cessaro thread…
http://www.allnicaudio.com/E/e_pdt_ampli_H-1500%20II%20SE.html
I know the AllnicAudio, I use their tube sockets, and they are very good. The AllnicAudio use...
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The news just come inhttp://www.amr-audio.co.uk/html/pr_ph77.htmlThorsten use to tell me that his ambitions phonostage project will be coming through in fall of 2008. Well, it is late but it is there: the AMR announced their new PH-77 Phono Equal...
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I'm a phono moron, but having had several phono preamps, I think I can understand what finds Romy right in the EAR 834P, which I love. I'm not as skilled and crazy as to try to make all the Thorsten mods in it by myself, but I've tried some tube swap...
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[quote user="Thorsten"]Then it does exactly what is asked of it, I asked JB to design it for me PERSONALLY as a "wire with gain". I have been on previous occasions been unconvinced of many stepup transformers, be they sowter, amplimo, EAR or jensen. ...
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Dear AllI am new here, but have been reading quite a bit about the EAR834P from people here who are quite enthusiastic about this design.Thorsten had got me off my butt to build a EAR834P from scratch when he posted his mods at the AA. I still o...
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