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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="oxric"] I have a question ..... I understand that the issue is a complex one and should be addressed with more care and paying attention to detail ...[/quote]Oxric, The issue is a complex, very complex but only if to try to predict behav...
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Last and this weeks I played mostly LP records. I have only one arm and one needle setup after my move to new room – I did not decide that what final configuration I will have for my analog. Today, while I am in Brahms wave I played the entire box of...
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I am actually doing the bass and ULF with different modules and amps. My bass modules are the dual tad boxes driven with their dedicated monoblock solid state amplification. The tapped horn is working for ULF only as it is crossed at 30hz with 18db. ...
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[quote
user="steverino"] If the aim is not to hear the music accurately but
instead to be overwhelmed by it then some kind of sensory overload is the goal.
[/quote]
Steverino, I think that your
question contained the answers. If you get “overw...
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[quote user="ulf"]A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound. The improvement was so clear that A/B testing was not needed. [/quote]
For wha...
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[quote user="Romy the Cat"] It is in a way ridicules. For years people who build of use horn fight with honk in horn, particularly in midbass-upperbass-lowerMF horns. I built my midbass horns and it has no honk, I mean no honk ever of any kind. S...
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[quote user="Paul S"]While you are merely being empirical, there are actually plenty of devices that aim to "benefit" the end sound of SS gain by using tubes to "condition" the signal from DACs, etc. Also, there are plenty of commercial widgets ...
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El`Ol wrote: "...And what about the brute force method (room correction for the bass arrays)? [Digital EQ]..." Romy wrote: "...Actually I am considering something like this... I think the final result might use some of your limp methods but the EQ O...
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Petar, you know my set-up well, and your remarks are correct within the context of that knowledge. However, despite the obvious technical problems, Etta's voice - per se - is actually - remarkably - accurate, with plenty of body and soul. While I s...
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Your point about relative levels is well taken. Still, the typical concert grand piano, for instance, does about a 27 Hz fundamental, as I recall (and certain pianos go rather lower), and some other instruments are not far behind. If to simply low p...
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[quote user="Paul S"]I do not know and so could not even guess if the "silicon" or the driver itself would be the weaker link in producing ULF these days. So I am fishing to see what any readers know about ULF in general and "contemporary" servo ULF...
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[quote user="Paul S"]Your point about relative levels is well taken. Still, the typical concert grand piano, for instance, does about a 27 Hz fundamental, as I recall (and certain pianos go rather lower), and some other instruments are not far behind...
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Haralanov, Yes and no. Of cause no one would deny the benefits of ULF reproduction but the key questions would be: 1) what kind of reproduction? 2) how to talk about it? There is no language to convey the ULF message. The 20K repose is meaningless an...
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[quote user="oxric"] RF at Ona wrote:Now the same issues and analysis applies to your woofer towers and with the new placement of the towers some of these effects may have become exposed.If these effects are significant than your new wider spaced UL...
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[quote user="Romy the Cat"]
[/quote]As successful I am with the midbass horns as problematic the situation with the lower frequency channel. I do have the good location for my LF channel and I setup the DC SS amp with line-level filter at 28Hz. The ...
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[quote user="oxric"] In my mind, and given my specific circumstances, the question of strategy is inextricably tied to the resources in terms of time, efforts and funds that I will be able to devote to this attempt to achieve what I have in mind ...
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True enough, Romy, most marketing and "advances" in ULF are aimed squarely at the HT "Market" these days, and this is the source of some of the buzz we are referred to. However, there is also the "Pro" sound "Market", such as it is. This includes s...
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Oliver, yes I was thinking about it as well. In fact my initial sentiments were that if I will not be able to make my midbass horns on the Triangular Wall then I will place my ULF channels in there. The best location for ULF channels is still a subje...
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[quote user="jessie.dazzle"] I have 2 ULF "boxes"; each has an 18" McCauley 6174.
The enclosures are sealed and each measures 14 cubic feet. They are made from 70mm thick concrete blocks.
Power is from a pair of M1.1 amps (100 Watts each)....
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Scott, is it your specific aim to configure an enclosure to "effectively" lower driver Fs? While this, along with an exponential increase in power, is a proven strategy for generating ULF, it seems like this approach creates more of a sealed/"IB" hyb...
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Thank god for partial retirement. Now, instead of delivering babies at 3:00 AM, I can listen to my system.Glad to hear the system is sounding so much better, especially with the ULF channels. Guess I'll have to get you up here again to retune my syst...
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Just how important are subharmonics and undertones in audio, and how they affect tone? I played around for a while with the Townshend supertweeters, this is a ribbon tweeter that you can barely listen to: you plug it in and put it next to your...
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I guess I have found a more or less usable new configuration for ULF channel. It is 28Hz, second order, with slightly raised ULF on the transition slope. It sounds quite good. Well, I am not supposed to say this. It doesn’t sound good but it sound pr...
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What it to have DC SS amp, in the way I have it but do not drive ULF from an amps but instead to put between amp output stags and ULF an 1:1 transformer, soft of a galvanic buffer. Would it be possible that galvanic connection would do some softness ...
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Hello, RomyI don't know if one or more of these could fit into your ULF scheme (or house plan), but it seems to have great potential. I also seem to recall that ULF injection was an old school technique mostly abandoned by the mid 60's as serious mu...
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My own limited experience with ULF has been that it hasn't been "directional" at all, and hard to say if "time alignment" is even a factor in most cases, apart from the inevitable delays caused by X/Os. Also, where the speakers wound up has been bas...
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The frequency where your room turns into a pressure chamber changes the way that we perceive bass. This is how we get "bass" in a too small space like an automobile. When removing the ULF channel, all of the music is transmitted in a natural way for ...
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[quote user="ulf"] Well, it was not really a surprise to us that the horn without the phase plug was dissapointing. Without the plug we had a horn that was a bit too short, had too large front cavity and less compression than we desired. [/quote]
It...
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[quote user="Romy the Cat"]May 16, 2010: My ultimate wet audio dream was to have Bruckner Room. But so far it turning out that I got another big B room. Since 3 days back I stopped the intellectual masturbation with my room my playback up for the...
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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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