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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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The ideal horn system would have to be well integrated into the room, acoustically as well as optically/cosmetically. As far as a commercial venture goes, I believe that Marc Henrys "La Grand Castine" was already (except for the ULF dipole panel) ver...
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[quote user="Romy the Cat"]fiogf49gjkf0dI am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pl...
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Vincent Brient is French guy who has built an interesting installation that I think worth to analyze. Years back Vincent was an enthusiast, like normal people, but it looks recently he turned “pro” and came to audio market with his own version of...
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There is site out dedicated it infinite baffles subwoofers. I am not sure how serious they are as they use mostly metal in rubber drivers as got thrilled when “Apollo 13 takeoff, my doors move back and forth 1/2", and the frequency is below 5 hz...
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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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My five cents, folks... find nothing wrong in a flexible ULF, as it, sort-of, makes honour to any audio system and music and audio lover, as this "flexibility" strongly reminds me to various music and concert halls and venues around, where their "per...
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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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I am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pleasant for my ULF. I feel it is a bit to...
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This is kind of funny. I got another B2 amp a few days back. It was near new condition, at least inside. As I plug it to drive my ULF I felt that it produces some kind of strange bass. I did not like it at all and it was very different then what ...
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Here we go, I will be telling you that I am looking or that I have found the “best” cable to use for bass channel? Sound like a stupid thing to tell you and sound like a stupid thing to read at my site. Still, I will be obnoxious enough to insist...
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It is difficult to say below what frequency there is no sound registered, the lowest fundamental on a double bass is 41Hz and the A0 on a grand piano is 27Hz, both these fundamentals and at least one harmonic thereof would probably be recognizab...
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[quote user="Paul S"]Romy, perhaps your ScanSpeak arrays are a +/- natural fit for mid-bass? If you used them for that you might also push them down a little until you got your ULF solution. The "nice" thing about this is, you might use something r...
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Once again, there is nothing specific in this post just some further thinking on the subject, as I keep discovering new idea.
A couple weeks back I was looking at a house that gave in inspiration to think about it. The house was 3 bedrooms Cal...
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I think my dysfunctional one 15” driver in my Midbass was
for a while and THAT was something the make me to feel that I need to move
Macondo to 9-9-1 position. With the recent changes (recovery of a woofer,
recalibration of channels, EQ of the mid...
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Romy,you have often advocated the ULF channel not having a sharp lower knee. Maybe something like the Thigpen rotary woofer with response to DC would be worth considering....
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The AE cited is said to be "designed for IB". Since one does not "use the box" or a vent, etc. to jack up IB LF, it's going to be all about moving the 250g Mms through the usual, steep, ULF filter. Maybe a notch filter or anti resonance filter at ...
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As a practitioner of vibration decoupling (stacore.pl), I second the idea. No gel, foam, rubber, etc will work on ULF as high mass + pneumatic mounts do. Pref. pneumatic damped too. I can assist with the design of the suspension. Cheers,Jarek...
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A friend in Greece started a company manufacturing and selling nice horns.He makes a serious attempt to use the best materials and highest quality finishing. Take a look!http://www.sonusaeterna.com/speakers.htmlBest Regards: Ulf...
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Romy wrote:"...What kind outer suspension it has, is it rubber?..." Correct (I know I know...)"...I think the key factor would be the degree to which the driver is able to decimate the LF pitches..."Pitch: The property of sound that varies with varia...
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[quote user="el`Ol"]Maybe one should't give up the attic-IB idea, the subs could fire downwards.http://www.aespeakers.com/drivers.php?driver_id=8[/quote] Great idea, thanks for reminding. That still might be an option. I need to educate myself about...
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If you put ULF boxes where they "beam" best, would this not, none the less, re-create the weird (U)LF chart you have already shared, with +10 dB at the chair, TT, etc? If so, perhaps you can have the wave cake and eat the full-pressure, too with 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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Yes, if you are at 40Hz first order then you are with regular dedicated LF channel and tone is certainly a subject. The entire definition of ULF channel inkstand or LF channel is that ULF channel has no tonal information. It is very same like use twe...
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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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Nope, I am not familiar with sound or applications of this tube. It is indirect heated beam tetrode – why would it be any different from the whole family of beam tetrodes? From my perspective it might be interesting for ULF DSET solution as it has a...
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....may work here as small dis-sincronizations in pumping the current should not matter at ULF.But how much God would be in 121478521785 parallel KT2318 tubes?1/121478521785?One, max two big tubes is still more appealing to me, don't ask me why.I'm t...
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I've been pushing this intellectual excersise (masturbation?) of solving Romy's constraints on a powerfull bass SE amp.Thanks to Stephie Bee the humanity have now a decent model of GU81M, so before electro-cuttingonself, one can see if the electrocut...
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I think this GM81M does not justify itself. It's good only for welding and tesla coils?Due to a seeming common unknowledge ofhow to relate spectra to sound at ULF as a bare minimum I tried to get a decreasingspectrum of harmonics. This brought the po...
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Thanks, Scooter, I will check it out. Meantime, I thought I should put a "recognizable" header on/in the thread... At this point I am "ready" for DSP at ULF; but I still "draw the line" at that... so far...I suppose that part of the "problem" is ...
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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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