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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="montepilot"]How would modifying preamp affect sonic character other than just providing more gain. What's the advantage? Once such a modification is made are you restricted to using the 6E6P-DR tube only? Will it change the sound o...
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Hi,[quote user="morricab"]Hmmm....I guess I can't really see that unless you are enjoying a particular coloration you are getting from the TVC.[/quote] Nope. On this you are wrong. Based on direct bypass tests the TVC's I USE (that is the specif...
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[quote user="anthony"]Have put all my DHT's on the curve tracer to see if pairs can be matched for preamp duties. [/quote] It was very interesting to read about all of it. If you have a socket for YO186 then you can accommodate all 4V tubes and I si...
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Yes, it is a bit ridicules to have 4 boxes – a clearly money-raising project. Probably Lamm need to make it 2 chassis init with box #5 is to store manuals and box #6 to store the tube replacements. Talking about tube – one gain state with 4 paral...
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Even though in the forum most of the thread stated as mockery of different companies, people and ideas but I would like to dilute this forum with a serious thread. The subject will be the Ayre Company.
I have to say that I never own any Ayre equipme...
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[quote user="guy sergeant"]When I worked for a UK based tube amp manufacturer some 10 years ago we had a couple of pre-amps using OA2's in shunt regulator circuits. These (physically shorter than standard) OA2's came from Richardson and did work very...
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Hi,[quote user="morricab"]the unit I tried (the Sonic Euphoria passive) did not live up to my hopes.[/quote]
Given my somewhat loose but existing ties with S&B and with Music First Audio I need to be careful what I am saying. But let me suggest...
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This weekend a friend of mine visited me to listen my playback and there was a very illustrative occurrence. We listening my audio and everything was like it should be in the program. He was visiting my last time in 2002-2003, before the Macondo was ...
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Looking what we do with our players, transports, A/D processors, D/D processors , D/A processors, externals clocks, cables, mass storages I find that it is all so bogus and so irrational. To my surprise I do not see anybody does what I wo...
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Wolfy, first of all your
question is based upon wrong supposition. I never asserted that tubes belong in
the power amplifier and not in preamp section. I never remember made this comment
and why I know it is because it is never was a part of my be...
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[quote user="RF at Ona"] Romy,I might have overlooked something on your site but I understand that your ULF amp is driven directly by the preamp line stage. If that is the case, you may want to consider an old technique for integrating subwoofers...
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[quote user="Romy the Cat"]It would be more complicated then that… as they do better or worth under the different conditions… I will be posting my further comments into this thread… Stand by….[/quote]A few words about the measurements above. When I m...
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For instance one could use this Eico preamp from the early days of stereo to get the center and Hafler surround channel:https://skyfiaudio.com/products/eico-hf-81-hf81-vintage-tube-integrated-amplifier-fully-restored-1960s-magic...
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Romy do you know anything about their preamp. This unit looks massive. Very little info available on it. The one description I found sounds like some of the typical American over done foolishness....
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[quote user="anthony"]Romy, have you had any experience with Autoformer VC's? From what I can tell they could work quite well at the output of a preamp driving the DSET's, mainly because they lower the output impedance of the preamp as they attenuat...
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I'am not a big fun of the entire parafeed idea as I feel that it is a way a duplicate of DC blocking but anyhow: if your preamp uses it then what are you problem with that parafeed cap? You were writing about your changing and bypassing different cap...
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Placette when last week back to Guy Hammel for “revision”. Despite of a truly phenomenal result with bass and dynamics my new version of Placette has one characteristic at HF that I feel was terminally incorrect. We presume that we know how to ad...
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[quote user="Romy the Cat"]Let see what he have out there. I think the companies like Spectral, Boulder and Burmester are very much in position to make challenging contemporary preamps. In fact Burmester has been doing something like this for year bu...
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Dear Kitty,[The positions of the instruments are an arteffect of sound reproduction and in real "live" you do not recognize the instruments positioning. You acknowledge thier presents “somewhere there” but you never recognize it as “right” ...
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Hi,[quote user="morricab"]Thanks for the info about transformers. It is as I expected, however, that these passive devices are not passive sonically at all. I agree with you that the higher quality of the transformers should lessen the effects ...
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Hi Romy and other fellow audiophiles, what is your experience with passive transformer based preamps? Is this the ultimate way to get a perfect variable gain? Or do you prefer to use an active preamp?Chris ...
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As you may know the 7788 is a high transconductance pentode which should in theory be able to give higher audio resolution than say 12AX7, 6072 tubes in tube mic pre designs. On search here the 7788 was mentioned as being used as the ...
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I just posted yeastoday the post above and have got already a few emails asking about the “new” ways that I am planning to use S2. OK, let me to explain what is going on.
The default Vitavox S2 driver comes with thier default aluminum diaphragm with...
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It's 60Hz hum, caused by both mechanical and magnetic field coupling to the output transformer. I used a toroidal transformer and thought it would not caused this problem but it did. When using an external power supply for both ...
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There
are some commercial preamps that have sub 10R output: Karana, Quicksilver,
Rogueaudio and many others. Some of them will ship the units to you to try. It
might be good to experiment with them. To have you local guy who will work with
you is...
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How many sources do you currently have? If you are building a phono corrector, make it for 4 volts output. If you have a PC for digital playback, there are good DACs with more than 2V output. That would leave a tuner to pimp - certainly less risky th...
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Thanks Paul! No, no, it works with Yamaha B2 and my Dannoys. I continue researching this intriguing project. For the Staxes I do not need a preamp. 5V is a plenty enough for B2 which has 1Vmax sensitivity....
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Thanks Romy. Given the power of 801A preamp, this correction is not necessary. I simply increase the volume compared to my clone of 834 RIAA or other sources and the autoformer at the output is still in the attenuation mode, providing increased outpu...
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I feel that the correct objective of home music listening should be to reproduce as closely as possible what one can enjoy in a great concert hall with great musicians.Thus, I have been a advocate for surround processing for years. As stereo replaced...
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I got a few from some other company years ago but can't remember who they were. I think they were a German company. Again try them first in the speakers and any higher wattage amp. I have used them for years without any problem of safety nor have I h...
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