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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Points about the self-sound of the PH-77 are well taken, not that I'll be spending 8K on anything any time soon, regardless of its "value".My own K&K phono stage is totally Spartan, just to avoid all the circuitry that typically facilitates the s...
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I have a mystery – my Second stereo arm stopped to sound right. My Second stereo arm is Micro MAX 282. I have been using it for years and I know it very well. It is not the “phenomenal arm”, it loose to my best arm and I know how, but it is an OK arm...
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I was listrening to Hoenniger/Bach Suites yesterday and I don't know which exact instrument he plays for these 1973 German Telefunken recordings (stereo LPs), but that damn cello of his was just ripping the room to shreds, with its bass notes as powe...
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I think that I've never experienced a pair of speakers placed to achieve the DPoLS, but once I had mine quite close since the "sound" was something special, which trascended the features of individual sounds and helped to make music an experience qui...
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[quote user="jessie.dazzle"]… I do not fully understand the relationship between output impedance and diaphragm control; also I don't know what you mean by "negative impedance". Your mid-bass drivers have 15 Ohm coils; from what you write, I assume y...
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Adrian, the neutral leg is "the" ground for any American AC-powered electrical device. The "ground" leg is +/- redundant, depending on the way the ground (or grounds) of the device in question is (are) configured. With some...
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[quote user="drdna"] I am quite sure it is a ground issue, as it is noise coming from the loudspeakers regardless of source or volume. Lifting the grounds on the amplifiers… eliminates the problem. [/quote] If it so them there is no need to contact t...
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[quote user="Andy Simpson"] Also, it is a great shame if you didn't try the quartet recordings - you are missing the only interesting acoustic..... these are very illustrative regarding other issues I mentioned (constant excitation resonance for exam...
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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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Romy wrote :
"...You have too much gain in your playback for 109dB sensitivity... I used ML2 with 109dB sensitively and L2 with 12.5dB voltage divider at ML2 and I had no annoying noise at nearfiled..."
Ok so I made a couple voltage dividers fo...
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Hello Romy,I am no power expert but here are my observations on your situation.Even though a PS Audio and others create a perfect AC sine wave this does not seem to be the answer, even for low draw front end components. It seems that some type of&nbs...
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There is nothing to be stunned. This is norms. You spoke with Customer Relations people. They are semi paralegal BS artist or the glorified secretaries who are clueless and not very effective. You need to talk with somebody who do actions and who is ...
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Byzantine Empire and PurePower.[quote user="spytsi"] Everybody here remembers that Romy's initial acquaintance with PP products was through model 1050; at some later point he upgraded to model 2000. Since then quite a few user opinions appeared ...
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It could be my mistake or poor taste, but sometimes PA systems sound very good to me. There was one in a toilette of a restaurant playing some classical music that made me almost angry, like, how is it possible to have such a decent sound so simp...
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Hi Cat. I run the 12AX7s just a hair over 1mA each, and the 12AU7s at 6mA. With differential pairs and bleeders, it ends up at 39mA on each +/-300V rail. That works out to 7H minimum inductance at 60Hz, using the standard formula.&n...
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Hi,I'm new to "Romy the Cat's Home Page," was impressed when I read a thread comparison of the Lamm L1/L2 linestage, which prompted me to post here. While I'm not an electronic's wizard (gift is mechanical), audio has been part of my life, dating bac...
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Actually, the M2-12 turned out to be a good arm. It really does Sound very good. I used it with Denon 103M and 103D. It has very “interesting” midrange in a way more interesting then SME3012 but not as dry as the SMEV. I detected just 3 limitations: ...
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Today was dark and rainy, and the electricity was much better than I have heard it for some time. Though I have not listened a lot since I did the recent changes, the parts seem to be breaking in nicely. Today I listened first to some Brahms Interm...
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I calculated the whole circuit and it looks each channel draw a total of about 3mA (could be even somewhat less). The second and third stage works like a whole and it´s very curious because I have seen this design before only in guitar amps in order ...
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Apparently, TTs are so mysterious that anything goes, as long as it's long, convoluted, and circular. Multiple DC motors "make sense" if one starts by believing that an AC motor naturally slaves to its sine wave and polarity, and that this behavior ...
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Yes, that WAS a common connector but this won't help you now. Radio Shack sold those as recently as ten years ago.Since the female side of the connectors has spring terminals there is some variability permitted in the diameter of the male contacts. I...
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I very slowly started to convert another amp to DHT. For now I listen just left channel and in a striped down mode: no tweeter and no Injection, letting the MF to care the whole upper range. It is interesting to play different tubes in this mode. Fra...
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Romy, I'll limit my answer to only speaker-related problems. 1) Still too bright sound. Not hard or edgy, just too much top end. My local guy suggested trying a single resistor in series, rather than an L-pad, to tone down the tweet...
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[quote user="SearcherOfBetterSound"]Not released yet though. They are an interesting company to me and whether or not their products are acceptable to you or me or not, they at least talk about some of their experiences and knowledge and tech&nb...
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Rick, sure, working volltage is important. What does your inverter require in the way of current in order to produce it's rated voltage at its rated current? I can remember times when I measured "correct" voltage when the battery was functionally use...
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[quote user="steverino"]I think this only works with grossly deficient recordings. I believe Levinson chose a historical recording as his example for the reviewer. But it allows the FM Acoustics listener to spend endless hours fiddling with the contr...
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Hey Anthony,Your project is going on track (and looks like a very good track)! Just a reminder about the room acoustics. You are talking about bass frequencies which are as dependent to the room as the speaker! Before installing your speakers into y...
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I am not a recording historian, so I can't say as a matter of fact, but I think one big difference between the 1947 (London) Yepes and the (post 1970) DGG Yepes is the guitar.Never mind about the "absolute superiority" of the "balanced" 10-string con...
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[quote user="zako"]Hans Vonk is also my favorite... It was Slatkin that built up the St Louis Symphony orchestra,,and passed the batton on to Vonk when he left,, VONK and the STL.,,,did a special concert for PBS TV of Carmina Burana,,,The chorus and...
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Can we really say that the "lowest fundamental" from an orchestra is 30 Hz? I sort of wish it were true!Something I think we can all agree on is that hi-fi tends to suffer from lower fundamentals and harmonics that are not properly proportioned, and...
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