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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 today a local audio guy stop by at my place for some listening. He never was in my new place and was curios what have done with my new room and my new installation; he was in my old room. When I asked him to criticize what he heard he mention ...
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I've meant for some time to add a few shots of the ULF channels. Here's the first one; the photos were taken at my old place.Sized to fit through the door of the elevator (barely).Baffle and lid cut with diamond blade.Getting that lid up to seal the ...
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[quote user="Romy the Cat"]
Aura made their 1808 driver in 80s and most of the 90s and it was wonderful. It had huge high-temperature neodymium magnet, unique magnet geometry with underhung 4" edgewound aluminum voice coil. It was the only 18-inch...
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This week two audio persons visited me. Both of them experimenting with loudspeakers of own design and during their visit I discounted my Macondo channels and demonstrated to then the contribution of the each channel to Macondo Sound. Both of them di...
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I have also a fondness for this design which may well suit your room with the line sunk in your basement. It is interesting that this design makes use of two woofers in push-pull configuration as well as making use of a transmission line. The only tr...
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I am usually not a big fun of somebody refer to eBay Items and I myself do it very seldom. Still, here I am as I think it is an interesting deal for someone. There is a guy out there that is damping a few of Aura RS-8.1 bass modules.
htt...
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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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[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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I seem to remember that we've covered somewhere the sonic benefits of SET at lower frequencies, but I guess I never really thought of ULF as "bass", per se. If someone ever comes up with an SET that can be an effective part of an AuraSound circuit, ...
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I have been running now a digital crossover at 20Hz, 3th order with some kind of shitty power amp. The digital crossover has a remote control. I would not say that I like the quality of my ULF but I am telling you that True ULF implementation is abso...
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Hi Roberts, Romy and others,Before this thread vanishes in undeserved obscurity, I have a question or two for you. I understand that the issue is a complex one and should be addressed with more care and paying attention to detail than I am do...
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[quote user="Romy the Cat"]I do feel that a playback sound has to be built first...The way how I trained myself is to disconnect channels. While I was making Macondo, installing it, moving it and experimenting with it I was frequently disconnecting c...
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[quote user="Romy the Cat"] For a casual observer it might appear that I am constantly fought with my ULF, finding and loosing better and worse configurations. It might be so but I have a very strong sense of objective of what I would like to ac...
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[quote user="ulf"]Let me tell you a bit about how an why we designed the midbass horns the way we did.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 so...
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A guy visited me today and while I was playing to him some music an ides stroke me: how to make ULF channels invisible? I have given birth to a ridicules ides to make huge, 40hz, no-cheating horns in time-aligned position absolutely invisible in list...
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If it were me and I had that basement that could be made use of, I would seek to achieve what you have done with your mid-bass horns in the loft. I know that you considered and dismissed the tapped horn idea some time ago but it would cost very littl...
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Here are two guys in Belgium that made up 833A 150W amp. That might be a good candidate for driving ULF channels.
http://monolithmagnetics.com/index.php?option=com_content&view=article&id=77&Itemid=81
Why I do not have...
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[quote user="Romy the Cat"]Even though quantivly and structurally bass is correct but it is not what I am looking. [/quote] Last night I got rid the SMS crossover. I built in the 28Hz, 12dB per octave crossover in the Yamaha B2 amp that I use f...
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Romy,How about putting bass tower #2 directly behind#1, but facing the opposite direction from #1? This would keep #2 away from the turntable, yield a symmetrical setup and enable #2 to energize the hot spot around your chair.Note, I'm not sure whic...
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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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[quote user="Romy the Cat"]
The most important in audio is a state of realization and obtaining this state is a matter of time I am afraid. Let pretend that tomorrow I will build/buy some kind of speaker that would do the perfect ULF channel ...
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I am continuing evolving with my ULF application. The IslandPink’s question if my ULF affecting various types of music sound kind of funny. Would my answer to be predicable? I a bit release the pressure from ULF. The way I use ULF allow to chalks the...
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Post #70:
ULF
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by
Bill
on
2011-03-10
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What I heard in your room on Saturday was superb reproduction of what was recorded from 40 Hz. up. This is ideal probably for a recording of a chamber group in a small hall without anybody present. One could hear the hall surroundings which replaced ...
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I would like to suggest an alternative factor or explanation to your recent ULF/midbass findings.When you were chronicling the design and implementation of your midbass horns I was curious as to the effect of the very close placement of the two h...
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I was trying to fix my broken B2 amp and I think I “fixed” it to the point that it is absolutely dead. That made me very upset. It is kind of funny as playback sounds fine without ULF channel and I frequently listen with ULF channels off. However, ...
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I am not sure that I am at final stage of my ULF wondering. I do like the integration-free problem of my ULF via tube crossover. I am a bit concert that I am injecting now + 9dB at sub 20Hz and do not feel that I have too much bass. I am a bit mo...
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My sub-bass amp is back but I am not sure if I am comfortable with it. The guy from QAudio did a wonderful job to fix my modified B-2 power amp and now I have my amp for ULF with passive line level filter in it. So, Now I have two identical, fully fu...
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It seem that the concensus here is that there is no tone in the ULF range, something like below 50Hz.This is probably not true for live acoustical instruments.Physical systems that can be described by non linear differential equations, are known to p...
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More and more I am running across applications for the Hypex digital amps, which seem to be mostly plate amps. Does this stuff have a place in high-demands systems? Could it replace giant coils? It is no secret that almost all "pros" went this wa...
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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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