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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi Romy, Just a couple comments on recorded quality and dvds. If you have a chance try to find the DVD called Eroica put out by the BBC a couple of years ago. It is a quasi-reinactment of Beethoven's unveiling of his new masterpiece...
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Hi Romy,
I did the review on the AcousticPlan amp, called the "Santor". It is indeed a two-stage amp using 4 6922 tubes in parallel to drive a high Bias Mosfet output stage (it is class A to approximately 15 watts and runs very hot). It ...
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Hi Romy,I am very interested in what you have found out about the 6C33C tube lifetime because I am using a pair of Silvaweld OTL tube reference (their name for them not mine) amps that use 4 x 6C33C-b tubes per monoblock (so a total of 8). Thes...
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Hi Thorsten,
Interesting preamp ideas.
The Silvaweld is also using some rather interesting ideas. For
example, the power supply is all tube (ie. rectrifier and regulator)
with a large choke as well for filtering and using a 300b as the hi...
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"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
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As to the best transformers souding more transparent than the best resistors, I'll believe it when I (don't?) hear it. You claim to have heard this but I most certainly haven't. Based on theoretical arguments the noninductive metal film r...
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Well Romy, IMO they are not just tonally different they are more
tonally correct, ie. they simply have less coloration than other
technologies. Just listen to a recording sometime made with a
ribbon microphone and you will understand what I ...
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Hi Thorsten,
"I agree. I
have to note that even in active preamp I/We (the we are friends from
the London Live DIY Circle) tend to prefer TVC's over resistors."
Hmmm....I guess I can't really see that unless you are enjoying a
particular col...
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I do have a speaker with a flat impedance. It is an Apogee Caliper Signature with an impedance variation from 3 to about 4.5 ohms over the whole range. Fortuneately it is not so dead as your example as it has about 86db sensitivity. ...
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Hi,
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 I noted (if not elimi...
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Hi Thorsten,
I understand what you are saying and with regard to the particular preamp in question and you may well be right as there is no mention by the manufacturer what brand of autoformers are in use (or if they roll their own). I am curi...
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Hi Romy,Not sure exactly what you mean by SET-minded speakers. Please elaborate on that issue. I don't quite see what about your horns would make an OTL perform any worse than a SET. What I proposed to you, the concept of a OTL SET ...
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Hi Romy,
I just want to add my experience I had last year with a transformer based (actually it was an autoformer based) "passive" preamp. I thought that this could be the final solution in my preamp quest. Alas, it was not the case.&nbs...
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Yep the same company (they also make a VERY good sounding OTL using the 6C33C tube). I have heard that zillion tube amp and it is also quite good (but I thought the 6C33C amps captured the "correct" tone better). You should try to hear th...
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Hi,
I have a phono stage from the Korean company Silvaweld that uses the 5651 tube in the power supply as a voltage reference. It also is using a Russian 6C19Pi tube along with EF86 pentode as the high voltage regulator. The rectifier is...
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Hi Romy,I guess I view absolute tone a bit differently than what you describe. I think that each real instrument or person (as in singer) has its own "absolute" tone. It is the sound of what it is (or its gestalt). The ideal speaker...
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Don't confuse between live music and recorded music. I never speak of "correct tone" with regard to live music or real instruments. A Strad sounds like a strad and a POS violin sounds like a POS violin. Both tones are "corrrect" for...
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Hi Romy,Interesting scale you've come up with there. I would like you to take a look at a preamplifier from Korea called Silvaweld. I have found that with this preamp (model SWC 1000) in my system I can differentiate easily the ...
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Hi Romy,
Could you explain a little more about the amp? If I understand you correctly it is a 1 tube stage with solid state (Mosfet or Bipolar??) output. If it is Mosfet then it is likely to be running without negative feedack, is that r...
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Hi Romy,
Give the ribbons a try http://www.e-speakers.com/products/beengineering.html. These are too expensive I think but believe me the sensitivity is real. The best part is also that the impedance is very flat and an easy amplifier l...
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Hi Romy,I have found that the Apogee loudspeakers ribbon drivers can quite successfully reproduce correct tone. The reason why is this: They have very little coloration from the driver materials themselves (no nasty resonances as the reso...
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