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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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I have been working on my system. I post sparse as I need to listen a lot before doing any changes or decide on anything.I have changed the 1000hz JMLC horn to a 1400hz JMLC horn and the results are better. I have better integration with the Fostex t...
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Hi Mats,I am not using 4 on each side. I will be using two on each side. Until now I always liked sealed enclosures. However Tad drivers are more suited to ported configurations. If you do not push them to go too low and have a reasonable fs point, t...
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Romy,I am considering a midbass channel similar to that you are currently using. The plan is to use the channel as a form of EQ to help rectify a large circa 40Hz room mode...bass cannons below the mode, midbass above the mode, and upperbass horn ab...
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Jorge,I would hope that the specifications of the Fane 8M drivers would not depart from the specifications of the old 8Ms that you have helpfully attached here. I just sent the pdf file to your email directly, not having seen that you had posted it h...
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I do understand that by changing power amps to drive Duos you got different sound. However, I do not think that it is a right direction to look at the things. If you want more “depth” from Duos then you are taking about the lower midrange and upper/m...
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"I think the ultimate length of the upperbass horn is 3”- 4” throat. With longer horn it would be very complicated to time-align it as the horn will mask out the MF driver." Is this also why you use tractrix curve for expansion? To shorte...
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Romy wrote :"...Years ago when I researched the subject of the drivers for my UpperBass horns and when I was trying many alternatives..."And in the Warfdale thread :
"... I had in past a few Goodman drivers but I was looking very different thin...
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Very cool, James, it would be very interesting if you put your ears into an investigation of “Ooopsy back chamber.” I was wondering about the A45 Lowther as well. The 125Hz midbass horns that you made, how big the input hole in there? The attempt to ...
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[quote user="be"] The best driver I have heard is the TAD 4003.
It does not use the secondary resonance of the suspension, as described by Duke LeJeune above for the TAD 4001-4002, to extend the response towards 20 kHz, but has a natural roll off fr...
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[quote user="Dresden"] ... two J-shaped horns back-to-back, as though it were a mirror image. --the drivers do NOT share the same throat, but instead each driver loads its own horn. I'm sure the 'picture' is now clear, correct?...If...
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[quote user="Romy the Cat"] Furthermore today to insult the injury it look like my theory about the PP2000 “transparency” to input noise blew in my face as today the wall electricity sounded much better than the from PP2000, that is what I did – disc...
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[quote user="Romy the Cat"]You use Edgar’s refrigerator subs that use own LF SS amps (that use EQ of I am not mistaken), so you do not use the full advantage of SET LF sound.[/quote]You are correct, though I believe the subwoofer covers only below 40...
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[quote user="Romy the Cat"]slowmotion,
I think the ultimate length of the upperbass horn is 3”- 4” throat. With longer horn it would be very complicated to time-align it as the horn will mask out the MF driver. The ultimate driver for upperbass s...
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[quote user="skushino"]"The top response of the upperbass channel is challenged. I do not know why it is – a wrong driver, a wrong curve in J-horn or wrong made filter… " That sweep mirrors what I hear - specifically tepid and weak upper bass in the ...
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Yes, I know it is not correct to make any generalizations and it all depends upon the acoustic environment, where the horn is being placed and the influence of the other channels, so my original question was in context of listening to the upperbass h...
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[quote user="jessie.dazzle"] And Ok, maybe I don't have all the filters dialed in, and the DPOLS are like a dream to me now….[/quote]
And with 1600 pound per channel you might forget about the DPOLS … -:)
[quote user="jessie.dazzle"]Here is an RTA ...
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Keith,You would never know from the data how those upperbass driver will behave in horns. The 55Hz of air resonance (if it is true number that always not the case) is a good number for 60-70Hz horn. I really would like to know the max amount of mm th...
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Dominik, I did not check the geometry of the horn, I am sure you did it correct. At the first approximation it looks like right numbers. Here are a few comments. 1) Please next time name the images to upload to my gallery more identifiable. The nam...
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A visitor of my site, a guy who never ask stupid question about audio, asked me a question how to find a correct size of the back chamber of a straight upper bass horn that he juts built. I wrote a reply but then realized that it would be worth to up...
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It is depends what kind horn it is. For LF horn the resonance should not be “an octave lower then lowest frequency you can realistically get from the horn”. In fact the common way is to much the assembly resonance to the horn cut off by squashi...
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Stopped by at local audio friend this Sunday and watch some Brunner, Mahler and Wagner at his HT playback. He has integrated playback installation and video is played at his main system. I am not a fan of good quality of video playback and feel that...
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[quote user="Romy the Cat"]Well, it might sound as a heresy to you, but I personally
consider the impedance curve is a bit irrelevant in this application. In this application
you need to care only about only 2 things: if you have enough power in yo...
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While I was moving in to my new home John Wight undertook my Bidat for his new update. Up to now I did not have playback properly performing but the last 2-3 weeks I feel that my playback is back. Again, whatever I lien now has only upperbass horn a...
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I use my SPU Mono in 282 Micro’s arm with AU wand that was specifically made for the SPU cartridges. I run it 3g, not-oil-damped into SU2,so, the SPU sees ~60Ohn. I tend a slightly overload the typical MC cartridges and run them at 60R-75R of thier “...
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Moreart, 6,5" and 8" drivers are not big enough even for reproducing midrange, not no mention midbass.You say (quote taken from your website):"By processing certain overtones selectively, a rich bass effect can be created using the small speakers whi...
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The initials post was the body of email that Kostas sent to me and considering it’s format he presumed that I will me post it on my site. So, I did it (with his permission). I ran all those tracks once (some of them just a few seconds) and below is v...
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Since I finalized how my midbass horn handles decay the only things left in my playback is to set the right level and cut off point of my ULF channel. Formerly I did set it up for 35Hz, second order and it was fine as a temporary setting. However in ...
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I have to admit I have no idea and did not experiment with matching horn loaded tweeter to big ,direct radiating "extended range' MF channel. I'm not sure it's doable. I was speculating on the reasons why the owner of Moscow instalation switched from...
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[quote user="haralanov"]Ironically or not, I have no practical problems with it, simply because I’m not using big UB horns. My upper bass channels are much more compact – 4 very massive 15” drivers with no horns. Their integration to my main widerang...
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In my experimenting here, not really listening mind you, it looks like you can get a very nice frequency response to about 150Hz with those Scanspeak woofers. This frequency sits about where your Upperbass is rolling off so there is also the (distan...
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