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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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[quote user="Romy the Cat"]Computer playback has no autobiographical value. CD, LP, tape etc have autobiographical value and sometime huge value. A location on HD has none of it.[/quote] Agreed.[quote user="Romy the Cat"]... there are zillion valuabl...
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[quote user="AOK_Farmer"]I think what they did was to put filters, maybe just a simple capacitor on the AC side to try and reduce the noise that the units inject back into the ac mains. Perhaps they were getting complaints that the units worsened the...
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Jessie,
Actually the tendency of manufactures to isolate ground becomes almost common among any more or less serious manufactures nowadays. The main’s ground is so polluted in US hat it is scare… or even dungarees. I remember a few years ago when I...
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Peter, the Line Interactive UPS devises do not isolate decuple playback form mains in real time. They might have filters, suppressor, suckers, even resonance filters but they do not generate a new sinusoid. Perhaps I misunderstood you: are you poweri...
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I am very interested in your DSET adventure, and is trying to learn more about the application of adding crossover elements into SET amps. Looking at the schematic, I noted that you add first-order passive filters before the first stage of your...
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I just remembered that Haralanov and I discussed at length the merits of "mechanical filters" vs. electronic filters. We also agreed that a tweeter can sound much better when it's nested in a larger paper cone.Best regards,Paul S...
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I would worry that there could be an interaction between your electrical filters and the filter formed by the horns themselves.I, too, like to trust my ears and I would ten to trust yours more than mine but nonetheless you have created quite a compli...
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[quote user="rickmcinnis"]I would worry that there could be an interaction between your electrical filters and the filter formed by the horns themselves.I, too, like to trust my ears and I would ten to trust yours more than mine but nonetheless you h...
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This for someone who do not use ULF might be considered as superfluous but I am going to tell you that that for me, the person who use ULF dally, it is an absolutely mandatory tool. The ULF channels have to have a good calibrate dB meter that in real...
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Well, the issue you are talking about is very complex. You have many components in your signal chain, that contribute to the noise and signal quality,not only in power supply,but also in the signal chain ckts. The USB A/D converters have their own po...
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Romy,Thanks for your comments but don't worry, I wouldn't lie to "shut you up". I just want to provide helpful answers to this communities’ questions and also get useful feedback :)Please see the image below for details of this:[URL=http://imageshac...
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[quote user="Telstar"] What's really different, besides AC and capacitors is the DSP. Meitner IDAT algorithm makes a difference for sure. Also, I dont know if it uses any digital and analog filters, the lack of may improve sound transparency. [/quote...
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I was reading the Stefano Bertoncello's post about his new multi-amping again options.
http://twogoodears.blogspot.com/2010/09/multi-amping-again.html
.. and I feel that it would be a good idea to brief summarize multi-amping cros...
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[quote user="perrew"]Romy,one thing that interest me is you use an active RIAA and the Allnic is passive circuit if I understood things?[/quote]
Perrew,
Among the none-commercial, home-made correctors here is my evolution of phonostages.
...
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[quote user="Romy the Cat"]since I know that you do not deal with horns and discuss it only as theoretical exercise I am not sure what we are talking about. [/quote]Hahaha :-) This experiment was made a few days ago by a friend of mine who is speaker...
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[quote user="haralanov"] This experiment was made a few days ago by a friend of mine who is speaker repair person. The modified compression driver is Soviet made 1A-16. If you have the chance to compare the single layer VC vs. the original VC and to ...
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Keep in mind that my crossovers are not just 6db filters. There is an impedance correction network, suited to these exact drivers in these horns. Unless this correction is there, the first order filters can not work against the rising or falling impe...
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[quote user="jessie.dazzle"] I have not heard any other systems using Vitavox S2 drivers, but I know it is possible to get the S2 to generate on-axis unpleasentries. In the case of the system I am building, one can happily sit straight in the firing ...
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Dear John,
I hope you don't mind me writing directly to you. I've been posting on Romy the
Cat's audio boa...
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I do not know if this should be posted on an other thread but im posting it here only because I was looking for a solution nearer than PP2000 (in my country) so this is the story ; Two days ago I make the 120km that spread Viña del Mar from Santiago ...
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Nope, sorry, it does not make any sense for me. The use of Rowland amp I guess is fine if it being use for testing of the filters. Still if you use high-pass for your midrange horn then what resistor does in your RC filter? A first order filter, rega...
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[quote user="George"] 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 problem is still coming through. [/quote]
George, you not n...
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Yes. For prototyping.I found out that Luxman built an 8-tube unit exactly like it.I borrowed a picture from the net: www.webbtjanst.se/temp/2003.jpeHowever I think it might be interesting to build one, with decent pots, 6dB filters and 6 buffers afte...
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[quote user="Romy the Cat"] I did not expected that the main impediments in the super Milq project will be the organization (sound) of the filters, particularly the high-pass filters. [/quote] After some experiments it looks like the input stage of t...
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Although the spiritus movens of the whole idea seems to have found thebass solution, the idea continues to live.Thanks to the invaluable help of Stephie B, I've comeback to the GU81M likea boomerang with some progress. There are 3 new things:1) FFT v...
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Doug, it is a lot of tuner went over your hand. I wonder what drove you to do so. Was any specific quality of sound that you were looking and the tuner that you own did not serve you?
[quote user="doug s."]romy, there is a tuna freak in los a...
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Romy,His website has a lot more information than that:Do lossless compressed audio formats all sound the same?http://archimago.blogspot.pt/2013/05/measurements-do-lossless-compressed.htmlDigital Filters and Impulse Response...http://archimago.blogspo...
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Yesterday my machinist informed me that the End of Life Phonostage’s chassis will be reedy next week. So, I desisted update the power supplies of the thing replacing the FRED diodes with those no reverse/forward recovery Silicon Carbide Schottky diod...
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Thanks for that collection of negative information on the DSP effects on music, Romy. I'm not a contributor to your site but you always put me in wierd situations with your unusual findings. For example, I have always used a DBX digital crossover in ...
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