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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="Axel"] I hope I got this right when going through this long thread with LOTS of information. Did you mention for upper-bass cross-overs Elko’s (electrolytic) only to be your preference? If I have it right, any special preference at a...
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[quote user="serenechaos"] blah, blah, blah, all that stuff... yes, yes, I was thinking along those lines last night after I posted it, and wondering if effects of hi pass, (not just steep acoustic roll off of driver), in the amp, relieving unwan...
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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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A little update on the Milq amp.After sorting some of the problems with the amps transformers (see posts above ) .I now have two mono blocks operational that have about 700 hours ,I'm so glad hour meters were installed .Filament voltage is spot on 6...
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The coupling capacitor is a first order high pass filter. I have .68 in there for there for this purpose. Obviously the slope will be shallow, so precision in the value will not be critical....
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Hi Romy,I am studying your amp build. I see that for your 3 high pass RL circuits you have:Lundahl LL1531 Transformer. How did you connect this transformer so that it could be used as a 9.3H inductor? It appears to have 7 terminals 1H - what did you ...
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Very comfortable and very accurate.
http://qbx6.ltu.edu/s_schneider/physlets/main/rlc_highpass.shtml
The CatPS: Do not miss the Dr. Scott's Optical Illusions and the rest of fret stuff.http://qbx6.ltu.edu/s_schneider/...
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[quote user="Paul S"]Probably not news, but: http://www.supravox.fr/anglais/haut_parleurs/135_LB.htm Another one that at least looks the part.[/quote] Thanks, Paul. This Supravox 135 LB indeed looks like an interring driver for a project of mine. I h...
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Romy, I'll be digging round in my amps tomorrow and intend to install a filter for the red tweeter while there. What should I be aiming for? 7kHz first order from memory, but hoping you can confirm. Such a filter could be achieved just by changing...
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Romy wrote :
"...The horn rate is 60Hz and it is croosovered from 70Hz – VERY interesting peculiarity..."
And
"...Where the GOTO-Jackson horn shines is in GOTO recommendation to cross the 60Hz horn at 70 cycles..."
I would have thought t...
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ahh yes, tapped horn is what you would call "close bottom." It has to be designed around frequency response (which is very narrow band). It isn't a problem getting one to go low enough though, and the quality of sub bass produced, smooth yet dy...
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[quote user="decoud"]Hi Romy, I imagine the coupling cap in the full range melq acts as a first order high pass filter: is there any reason why one could not lower its value to raise the cutoff to a level one would otherwise redundantly need a speake...
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The new parts I needed to build the new crosovers arrived about a week ago, but I have been otherwise busy (for a change...), and now I've managed to get sick, so I am still only mentally toying with the project. I will try to work in some bread boar...
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Romy, I appreciate that this is an old thread now and that you may not remember everything from your time developing these amplifiers, but I have a (hopefully) simple question about the upperbass crossover in the schematic above. All other channels ...
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I thought that a digital crossover had a negative impact on sound quality -- especially for use between a midbass, midrange and tweeter channels. So I made an experiment a what I learned was not expected.I used my mid horn and two high pass filters i...
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[quote user="Romy the Cat"]If you read the very important post: http://www.GoodSoundClub.com/TreeItem.aspx?PostID=5255 then might understand that it lead to a painful research on the subject. I have ton of data now and many experiments done. If ...
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TAD TD-2002:I have been evaluating these without horns. Essentially, listening to them without the horns, but also with original horns. No difference, as I will describe what I am hearing in both configurations (applies to their high frequency reprod...
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[quote user="Paul S"] I took a couple of pictures, but I can't figure out how to upload them, just yet. [/quote]Hi, Paul. Take a look here http://www.goodsoundclub.com/Forums/ShowPost.aspx?PostID=1120 [quote user="Paul S"]I took out the phase plug, a...
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>>Gera, are you catapulted from another planet? Are you sure that you want to drive a mid horn with Rowland amp?
Romy, some people that know me will say "yes", I am not sure... Of course no, not the Rowland to drive my horns, this is the amp ...
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This is something I have been at for the last few years, I have tried a few drivers, at the moment some of my favorite are the vintage RCA MI 1443, yes filed coil and some funny cone diaphragm, they are used from 500 hz to 5 khz with a Fostex T...
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[quote user="Romy the Cat"]Not kidding?! :-)Yes, I always felt that Tannoy the vintage 10" sealed box were the best Tannoy out there. Still they were the best not because they were best but because the 10” had less bass extension and did not go into ...
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[quote user="deemon"]Hello , Roma ! I think that you can use only a back chamber with decreased size , and a serial capacitor . I think that there are no ways besides ... [/quote] Actually it would be a serial coil, as I need a low pass no...
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It is really a seldom thing in audio – when people ask questions afar they do own homework and demonstrate understating and own thinking on the subject.
Question: Whan bass horn back chamber tuning should be started? &nb...
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I was searching for an answer why squire wave is so screwed and I was advised by the site’s visitors that it is due to HF restriction of my channel. My HF response does look too low to me – the 23kHz; with all my ultra low capacitance magnetic I ...
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Hi Romy,I am studying your amp build. I see that for your 3 high pass RL circuits you have:Lundahl LL1531 Transformer. How did you connect this transformer so that it could be used as a 9.3H inductor? It appears to have 7 terminals 1H - what did you ...
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Roman,[quote user="Romy the Cat"]Nevertheless, if that bass was truncated between the stages then the devastations are way more severe. [/quote]That may be so, however an LF response of less than -0.1db down @ 10Hz is what is normally called "ruler f...
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The answer could be simple .to round it up fast it(sound quality) equals to any PROBLEMATIC FREE playback system. That said being problematic free is not easy for any playback system or what you call high end thats why a cheap headphone may pass the ...
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One possibility is that the midrange to high frequency domain has very large suck out (no pun intended). The priapic horn with its aggressive high pass might be a "filler" device to amend the 2nd order electric dip in frequency (Linkwitz-Riley alignm...
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I stopped by yestoday ay NY show for a couple hours. Somewhere in there SRA’s Kevin Tellekamp fished me and told me that he wants to show me something very interesting. He brought me into a room where Hørning loudspeakers were demonstrating. (http://...
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I know, I know, it is absolutely not NECESSARY and I do not think that I see a need for it. I however see that it might be USEFUL in SOME cases when a recording was mastered by a complete idiot.
So, I wonder if anyone comes across to very high...
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