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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Romy wrote:"...What kind outer suspension it has, is it rubber?..." Correct (I know I know...)"...I think the key factor would be the degree to which the driver is able to decimate the LF pitches..."Pitch: The property of sound that varies with varia...
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To use a Class D amp on those SG-146LD GOTO drivers? Is it what GOTO proposes? Hm, I do not know, the more I learn about them the more question I their sanity. The SG-146LD does not adjustable resonance frequency. It means that in whatever horn i...
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Romy,I somehow feel that you should look into the vibration induced resonances that those rooftop horns might create.I'm not really familiar with the all-wood building techniques used in that side of the Atlantic but I have a hunch that unless you ei...
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As a practitioner of vibration decoupling (stacore.pl), I second the idea. No gel, foam, rubber, etc will work on ULF as high mass + pneumatic mounts do. Pref. pneumatic damped too. I can assist with the design of the suspension. Cheers,Jarek...
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There does seem to be a fair consensus the Airforce Zero (not to be confused with Forsell) is a success. I assume its success is due to controlling vibration. I believe US $400k is a sale price as reviewers say it will be Over $400k, not including th...
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I'll buy some more 7788 and give them a try. I'd hate to change tubes at this point. My triode connection has pin 8 (g3) to anode, not ground). I wonder if that makes a difference. Also, the power supply chokes are nearby, per...
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[quote user="Romy the Cat"]The contemporary productions DHT tubes (Russian of Chinese) are superbly firm and have no internal noise when they shacked or hit. The mintage 60 years old tubes what you make the “close to ears” test responses like as some...
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Romy,You were totally professional and proper; & I was greatly impressed with you reply.When I [zz] wrote " I do believe that it is best to minimize adverse contributions" -this statement was a reference to adverse contribution of vibration floor...
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Just speculating, but a tense wire can transmit vibration way better than a loose one. Perhaps to have an accurate bass response you need to keep low frequency oscillations away from the platter, and the tight tape helps to drain them to the rest of ...
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[quote user="Stitch"] When you look at the data sheets, you see, that they have different Hz range with different weight. A reason why I added some more mass to my Micro which is sitting on a VP. [/quote]
Actually it is not my observation. In ...
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[quote user="Paul S"]If you can do it, try isolating both cases/chasses from your "ground plane(s)". Use one inclusive "ground plane" for both the PS and the gain/RIAA sections, and ground this "ground plane" to the house "neutral" wire. Do NOT conne...
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i am a fan of this.
who said that music is supposed to be ONLY about sound ?
until recording was invented musical performance was never ONLY about sound. because there was also something to SEE for example.
although i can still hear 25 hz i...
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[quote user="Paul
S"] Am I the only one who wonders about parking the amps on the woofers? [/quote]
From the point of view of a methodological purity indeed the location of a vacuum
tube amplifier atop of midbass section does not make any sense. B...
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Last week I had an audio visitor from far US state and listening Sound in my room and wanting to make a compliment to me he said: “of cause, no one can’t achieve this bass without your solid floor”. Being asshole as I am I begun to stress with h...
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It possible that those systems exist but I never heard about them and even I think it is too late to invent the thing for record playing but I still do like the idea.
Pretend a needle reads grooves. Depth and the right-left variation of the gr...
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Forget about the vibration! Those vibrations are representing jus one aspect of the problem. There are many others as important aspect, and to fight/name the only proposed vibration course is as necessary as to expose a lend worm to a psychological t...
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Interesting… I was under suspicion that only Vibraplan allows LF decoupling but here is another California company the offers an alternative solution.
http://www.minusk.com/
The Vibraplans did work fine and the principle was very simple, I read wha...
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The problem of most solutions in high end audio is "one step forward, two steps back". Personally I prefer to hear all information/dynamics of sound even if the sound is out of control.when I use Isolation Transformer, AC filters (both parallel and ...
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After spending considerable amount on the hum problem, one way to fix it is tho remove transformer and place it in a different chassis, the noise level will improve more than 15 db to -74db. But that cause too much hassle, so I got it improved to 62d...
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Referring back to "retro-fitted", under-floor shoring in finished rooms, such as basements, I forgot to mention something I have run into a few times, in "traffic areas". This is the disintegration of the drywall ceiling board that almost invari...
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I think your problem with acceptance of “absolute tone” derives from your visualization audio tone is an imitation of musical tone. It is correct t form one side and it is a strategic mistake from another side. Let me to state it again and it is very...
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...of wines and power conditioners and Bruckner and cigars. That said, I don't do cigars; I really, really do do Bruckner; power conditioners vary in their effect from place to place, day to day, and hour to hour (not only that, but most of them need...
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[quote user="decoud"]It seems reasonable to begin with the science -- as a preliminary to listening -- but I do not follow the logic here. The source of the vibration is principally the floor: the table should therefore not be coupled with spikes but...
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newbie here but this interests me as i have the baby raven one. the platter of the ac is hollowed out and filled with a gel and then topped with the copper "mat". why is this important? because vibrations exists is 2 forms, s-w...
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Last month of two I keep thinking about the super-meaning of lowest octave in sound reproduction. It is not about the importance of the lowest octave for sake of audio reproduction, there is a lot about it in other pleases of my site and anywhe...
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[quote user="Romy the Cat"]Ok, here is another subject. I feel that I kind of screw it up as I did not foresee it in my planning. What I need is to add some decupling devised to my horn in the location where it will be mounted to the surface of the ...
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I had the same problem with my 6 foot, bass horns , which were built from 3/4 inch high density fiberboard. On doing some measurements back then, it turned out that they were vibrating for a few milliseconds after a pulse, giving a decent rise time b...
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I recorded the output of my cartridge/ phono stage/ line stage with the stylus resting in a groove of a stationary record while playing a CD at high volume with heavy bass through another path. Since my system uses tubes I was also getting tube micro...
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[quote user="Romy the Cat"]fiogf49gjkf0d1) 3) The common mode filter you have at the PS’s input- why do you use them? They do eat some dynamics. As many time I removed them from all imaginary components as many time I witnessed better sound. ...
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How strange... I was thinking about this, and discussing it during lunch @ the lab a couple days ago... Got there from a totaly different direction though, was thinking about harmonic vibration dampers used on crankshafts, (usua...
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