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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Romy the Cat"]When you are taking about “caps at higher frequencies”, then what do you
mean? The line level, the speaker level, the line level between? Do not forget
that a RL filter is always preferable over C filter.[/quote]It was re...
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Hi Romy,I am calculating crossover scenarios for the HF Channel (Channel F) and am hoping that you can remember a reasoning for using a 20K LPad instead of a larger value such as 30K or even 50K? As the larger impedance is used the value of the capa...
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[quote user="Romy the Cat"]BTW, I was kind of saying it many times in past but I think
it high possible that it was no lost in translation. Anthony, if you are trying
to implement with your version of Milq the same multi-amping with line level
fil...
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A DSP is a great tool for modelling crossovers. It lets us experiment with a lot of things with no additional costs. There is a sonic hit, but far lower than "guessing" at crossovers.What seems to get the most traction here is using inherently well b...
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Hey Romy I read your requirements of a mid bass horn. I am using jabo tratrix KH-55A(320hz) with altec 288 and I want the mid bass to go under that. I would use a trattix round midbass if it was possible. But it's just not with in my abilitys to buil...
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Of course "the bearing" under a 100 lb. platter might be designed to last 100 years in that application, but I faintly recall something about a plastic thrust block, or something along those lines... Anyone ready to pony up for the 100 lb. platter o...
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I'm no expert, but my understanding is this. 99.9% of DACs are going to oversample the digital input anyway. Does it therefore matter if the input is upsampled or not? Unless there is a super-duper interpolation algorithm that can create more informa...
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Hey, Wojtek, nice to hear it worked out for you. And what did Retsel think?Can you and/or Retsel say what you did not like about the un-Bud-ed Lowthers in the same installation(s) and what the improvements are?I have been uneasy about "mere" "i...
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[quote user="slowmotion"]Romy, there are more ways to the top of the mountain... <BR>And we already know that your way isn't my way... <BR><BR>You bring up many very valid points, but still I will continue to use my digital crossove...
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I have to say, that I genially like the new 99.5. I do not have as perfect reception as I had with 97.9 with absolutely clear, no noise background. Still, thankfully the compression of the new 99.5 is very low and last night and today live broadcasts...
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As a certified non-expert I wonder about 1st order XO with the tweeter, because of the phase issue. Probably stupid, but I always figured that at 180 degrees you could just switch the wires...But I have not tried 1st order on a ribbon for a lon...
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[quote user="el`Ol"]I wouldn´t talk about "wrong polarity", rather about "dislike of the resulting harmonic spectrum". Wonder how the result would be with phase-correct FIR filters for the RED.[/quote] El`Ol, it is not how I see the sings and I talk ...
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Voltage sag at the ConEd level is the-same-only-different from porta power sag. If nothing else, at some point, many of us will have a huge "oversupply" feeding the tranny that feeds the nearby drop that feeds our house. No porta unit puts out anyt...
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[quote user="haralanov"] The ribbon is 100% tonally … If you use this tweeter lower than 10kHz your system will be totally unlistenable because you cannot reproduce the proper tone of harmonics.[/quote] It is pretty much what I found as well during m...
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Paul, again the diodes are there not because they are diodes and one needs a diode action there, but because they wanted to substitute cathode bias resistor with something that would have a big static resistance (to set the DC point and stabilize) an...
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In this case I do not knock the author of the articulate. He is a reviewer, the Soundsate.com level of reviewer, the worst kind and there is not a lot of expectation from him. It is not to mention that where did you an industry reviewer was able to ...
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wide open, just to hear what it does with either condition.It is illuminating and surprising, especially the first times, you hear, in one case, how it divides up the spectrum and in the other case how the driver responds above the range you intend t...
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I do not believe in applied presbyacusis. It is not that I do understand the subject of loosing spectral sensitively with age but I certainly do not feel that deterioration of HF sensitivity makes a person more or less capable to register music. We ...
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After much consideration I desired to get my test crossover. I chose when for Velodyne SMS-1 that someone pitched at this site before. The unit has 6, 12, 18, 24, or 48 dB/octave low-pass filters that I need and runs up to 200Hz. I do not think that ...
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[quote user="Paul S"]My first thought on looking at your photo: "Night On Bald Mountain"! This particular set-up might work especially well for Halloween Hi-jinks!You might even install a remote-actuated "turntable" with different filters... Best re...
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[quote user="from email"] …. I have the valves etc. for the Melquiades but have not built it yet. I have begun thinking about the preamplification stage. Right now it is just purely passive. Is this not the optimal input for the Melquiades? [/quote] ...
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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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Thanks for responding. You mention a rotary phase knob. Is this ULF system connected through a digital processor? If yes, will you expand on DSP effects on sound and system integration with the DSP? Many "pros" use these filters to "handle" speak...
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Yes and No... Yes, I saw/heard some exhibitors with music on servers, that I felt was limited in scope, and insufficiant quality to show what I wanted to hear (dynamics, range, complexity, whatever). It can be used as a convienient "reason" not...
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First, verify the levels. The ADC may expect a PRO input level and your tuner may be putting out 200mV.Second, I would run spectrum analysis of the tuner output and look what is happening past 15kHz. Is there any 19kHz, 38kHz or higher frequency sign...
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Romy, would you explain / help me better understand how you implemented the HP filter in Melquiades?The schematic shows a series cap after the first tube stage (C3 and C4 in the schematic). I think these are the first-order HP filters, correct?Quest...
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Well, since this thread is about the BMS drivers then what can I say? When I tried the BMS driver I felt that their “absolute tone” ability was at the level of demands of school auditoriums. Read more about “absolute tone” at:
http://www.goods...
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Paul, I would not touch this beast without modeling it firstat least to see if the electron flow is +/- what I'd expect. The eventual sonics are of course hard to predict form the model FFT's. The only hints are some posts at DIY audio and few words ...
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[quote user="Bill"]1. Put a door in front of the alcove that is casusing the resdonance and line it with 6 " of sonex. May turn the space into a bass trap at 60 Hz.2. Put an adjustable notch filter into your crossover at 60 Hz.[/quote] Bill, the 6 "...
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[quote user="guy sergeant"]A few months ago, iirc, you linked to a Canadian? amplifier which seemed to be made as or perhaps could be applicable for DSET use but I can't find the link. Can you remember where its is (or what it was called)?[/quo...
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