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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I believe a lot of the issues with earlier DD tables was that they were all servo controlled. That is, a feedback loop kept the average velocity constant. As a musical passage of complexity would slow the platter, the loop would respond w...
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Hello,
I have owned a TDA1543 based [url=http://www.sakurasystems.com/articles/Kusunoki.html]Kusonoki[/url] style (passive I/V, digital filterless, non oversampling) DAC for almost two years.
You can have a look at the measurements [url=http://ww...
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Hi,I've just taken receipt of a Model 2 to use as a DAC in my study (using the ADC occasionally for recording live from a mic). I would like to feed the balanced XLR outputs of the Model 2 into the single-ended RCA inputs of my Berning Siegfried amp,...
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This is what you need to know - these are the equations you need for a passive line level filter:http://www.t-linespeakers.org/tech/filters/passiveHLxo.htmlYou also need to obtain the input impedance of the power amps in order to calculate RC values....
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Well, Romy, it took me a while but I finally got the cobwebs cleared out of the phono stage, and the Shostakovich 10th was totally engaging as music (via the TAP). The recording is the (late 60s) Melodiya (stereo) with Yevgeny Svetlanov/USSR Syp...
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In Macondo/Melquiades thinking, random process means random result - and that is exactly what happened with Dunnoy. A random driver was placed in a random cabinet with a random passive radiator and random cabinet damping. All subsequent attempts to r...
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Yes, Jarek, I can see that, now that you mention it. Basically, then, it appears it would just eat low end, based on Q vs. other active speaker perameters. So, what would be the "theoretical benefit" of the added passive radiator be in the case you d...
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I dont want to hack this thread into TH, I tried them with sub-amps 150 watts and they didnt sound good, but I was using a passive preamp, when I added an active preamp things started to get better, now with 12 watts and a a lot of gain, bass is ama...
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I'm giving myself high fives today for nearly solving the broken piano sound in the room. :-)I'm not sure what fixed it, but I believe it to be a shelf half filled with records + two sofas and a carpet.There is room for improvement but it is a g...
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ThanksFor some reason, I can't attach pics. I use the attach key, but when I post, nothing happens...sorry.Here's some pics on Stereonet (in Australia) with my build pics.My comment re you cringing over Selenium, is that these are cheapish...nothing ...
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[quote user="Edgar="]
N-Set, I invite you to make your own recording of the phase of your Dunnoy. I used my phone camera to do it and a free online sweep generator. I had Tannoy, Scanspeak and laptop screen all in shot when I filmed and shot...
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I understand someone got good sounding results from - apparently - using a certain passive radiator to effectively lower the Fs of a 10" Tannoy Red. Can it be that the Tannoy has a long enough throw that is still damped in line with the rest of it'...
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This subject of digital crossovers became quite popular during last few years and many audio-people give up and go for a simplicity and painlessness of digital crossovering. There is an army of people out there who would swear by a complete transpare...
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Martinshorn , that for feedback, as I always preach:
the bad result during audio show does not mean anything, only good results
count. You see, there are zillion reason why during the show the sound might be
horrible. The inadequacy of the people ...
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In the past there was such a concept of full-function preamplifiers that included MM and MC inputs. With time such devises die out and nowadays it is VERY difficult to find a full-function preamplifier generally and a good sounding full-function ...
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Hi,[quote user="morricab"]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. [/quote] Well, the claim is no...
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.…as everything was discussed here before.[quote user="chaos"] …when i tried your recommendation with s2 and 3uF cap my "basshorn" refused to roll of;-) [/quote]
This is normal, I have written about it many times. Those large bass drivers have a lot...
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I think clearing this up this may be of benefit to other users who are building multi-way horns.
Let's say I've got two horns mounted on a frame. There's a high horn
above and a mid horn below and they are physically time aligned, meaning
th...
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[quote user="tuga"]Hello,
I have owned a TDA1543 based Kusonoki style (passive I/V, digital filterless, non oversampling) DAC for almost two years.
You can have a look at the measurements here.
I find that this kind of implementation (Kusonoki...
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CATEGORIES: 2100 - Mid and mid-bass cone transducers 2200 - Low frequency transduc...
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[quote user="rowuk"]
Impossible. A passive radiator can NOT change its tuning frequency on the fly. It is a Helmholz resonator - one single tuning frequency. It is also NEVER in phase, it is always late as it takes several cycles to ...
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As the builder behind these horns, I can answer some of your questions. It's true, I was primarily focused on the woodworking/building side, and now I'm experimenting with amplification and crossovers. I can't speak authoritatively on those subjects...
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...to obsess about speaker wire. Thinking about this a little more I realise that my preference for foil cables has always been in relation to speakers with passive crossovers. DSET is much more simple, the amplifier is driving the transducer direc...
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[quote user="Romy the Cat"]fiogf49gjkf0dI am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pl...
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Decoud,Though I have a pair of 8Ms, I did some searching around for alternatives just to make sure I couldn't find something "better".Its not really a kosher approach, but my research was centered on vintage alnico drivers, origin...
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It was not so long ago that the Super Milq was a twinkle in Romy's eye,and now it has come to the point he is a strong proponent of DSET (not to be confused with DH-SET). I am always a big believer in the power of topology. I was thinking about...
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Got today the parts and finalized the “perfect” Bessel passive crossover for my new channel. The coils are regular air-core 2.5H and 7H, the caps are Theta 10uF and the small wirewound tuning resistors that kills ~1.5dB in the channel. When I pu...
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I'm working on a project that may be of interest to others, and thought posting to this old thread was a better way than beginning a new post.I use speaker level passive crossovers, between multi-amps (not DSET) and drivers. My desire is to move the...
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Thanks Rowuk,I have used resistor switches before. In this case it's for a studio mixer so I want potentiometers. I'll look at the Alps stuff, thanks. I realise that question might not be received as "advanced audio practice" but it fulfils my object...
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I think Clark Johnson while he was doing his typical promoting of potions that would make hairs to grow on CDs was once pitching some kind of sheets with excellent EMI/RMF shielding. It is possible that EMI/RMF become a subject only when two or more ...
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