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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Jessie, I do not know why I stuck with the Aura NRT18-8. The Aura NRT18-8 and Aura 1808 are very deferens drivers and I do not think I even mentioned the NRT18-8 as something that worth attention, and particularly in the “Exceptional Drivers” thread....
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[quote user="Knightcrawler"]The 1808 in a vented box produces some of the best bass I've ever heard. I know some have a beef with vented enclosures but when designed right the sound can be brilliant. I've heard plenty of sealed, vented, bandpass and ...
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[quote user="jessie.dazzle"] You might be able to get away with a bit less; if I remember correctly, my calculations at the time (based on the above driver) yielded a theoretical ideal volume of something like 23 cubic feet (sealed), so still not...
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Back in the 90's i bought a pair of Aura 1808 woofers and made a set of 24 cubic foot corner enclosures 1 1/2 thick, crossover at 100hz, close to 300 pounds, way over built enclosure with a baffle on the face of the enclosure that i could remove. I T...
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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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Let start from the largest drivers and go down. There are larger then 18” drivers (23” and 30”) but looking at this magnet structures I do not find them serious. I addition to make the 23” cone stiff enough requires a lot of diaphragm’s mass or to us...
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Romy wrote:"...Jessie went for 23 cub feet, shall I go larger?..."For the McCauley 6174, I incorrectly remembered the ideal volume to have been around 23 cu ft, and that I had been forced to make a compromise; I was incorrect on both counts.I just ra...
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Thanks, msaudio, for sharing your experience with Aura and Hartley. I do not have Hartleyes. I heard them I think twice but person the people did not try to get out of their playback anything that I care, so it is hard to say anything. In contrary I ...
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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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hy romyas i dont find a second aura 1808, i was looking as a alternative to buy a aura nrt18-8. aura is producing them in china, madisound price is 939us dollars. wholesale price from hongkong ( minimum order is 11 pcs ) is us$288,00 !!! i know there...
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I was pitching before that to make a loudspeaker with integrated LF module you have no ethical right to charge more then let say $20K retail. If you charge more then you have no mechanism to deliver anything for the money people pay. However, if you...
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Rakesh, I moved your post to this thread as I feel it is more relevant here, I hope you do not mind. You ask yours the very same question that I ask myself. I do not have definitive answers to them:
[quote user="oxric"] I am presently consider...
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Back in the 90's i bought a pair of Aura 1808 woofers and made a set of 24 cubic foot corner enclosures 1 1/2 thick, crossover at 100hz, close to 300 pounds, way over built enclosure with a baffle on the face of the enclosure that i could remove. I T...
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[quote user="skushino"]ScottL,It looks like the two pics you posted are of different systems, the first being slot loaded PP, and the second (full-system) showing a "traditional" IB. You also seem to be confirming my intuitive hunch of potential sou...
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I also am selling my JBL 2490 mid-range drivers and perhaps a collection of my original Aura 1808 drivers. The 2490 drivers are new and Auras are some old and some new. I just do not see myself to develop any inspiration to use them......
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The Aura
1808 had free air resonance at 24Hz and required enormous sealed
enclosure of 14-16 cu feet. Wilson Audio used the Aura 1808 in their
unfortunately-ported XS subwoofers and soaked from their relatively
small enclosure an extra 19dB...
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Hm, the 18mm out of 50mm in “fully in-gap mode” for Aura? It sounds too bad. The last time I touched this subject it was 6 years ago and I remember I had better impression in term of the numbers.
I just looked at the Aura page:
http://www.au...
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I realized you meant Midbass when you wrote MD. I agree that letting the midbass horn run full range on the bottom is not a good idea. My point was try the bass channel (Aura 1808) run much higher and share the same crossover as the midbass when cros...
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ScottL,It looks like the two pics you posted are of different systems, the first being slot loaded PP, and the second (full-system) showing a "traditional" IB. You also seem to be confirming my intuitive hunch of potential sound benefits and horn ma...
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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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[quote user="jessie.dazzle"] In the case of a normal ranch style home (one level, no basement) out in the burbs, the attic is wasted anyway; you could put it to use, and if necessary, modify the roof, letting the drivers live up under decorative ...
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I completely agree that in a home setting, even if you love "Drum & Bass" and Hip-Hop, you will never ever use anywhere near 2" of cone excursion.
Romy wrote :
"...what the companies always “forget” to mention is what percentage of their excursi...
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romy
i am not at all intentioned to make a horn speaker to get rich. i dont think abought this at all. for me its hobby. its abought to have fun, and to get as close as possible reproduction of live music. as close...
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A few points I would like to make. I do not know if the Northcreek dropped resonance by adding mass or by softening suspension. I hope they leave the cone along and softer the suspension of the driver instead off adding mass. Sure it would reduce pow...
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I've been thinking about trying the Klipsch Jubilee. The idea I have is to replace my bass channel (Aura 1808 in reflex box) together with midbass channel (Funktion One F115) with a single Klipsch Jubilee channel. Of course I'm talking about stereo p...
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I want to share what I feel is a good application of an injection channel, as introduced by Romy. But this is different and also useful and i can tell you it works and very well. Of course, I do not recommend to use this application in the same exact...
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Congratulations, Romy, I think you just re-invented the ISOBARIK loudspeaker.
Although, Linn's Isobarik implementation of two drivers moving in parallel separated in a small chamber which would be nearly in constant volume (and pressure) couldn...
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It is strange topic that I always had difficulties. I have a storage filed with all possible audio goodies, starting from some exotic goodies that people would chaise on junk-years for years and ending with Jimmy Hoffa’s skeleton. It is not that...
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I got home today and was listening the music of my carpenter in my basemen cutting the wood for my midbass horn. I was slowly thinking about the location of my perspective lower bass channels. The Midbass Horns, if the things go well, will cover...
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You know, it surprises me how much less fan to listen my playback without ULF. Nope, the playback does not sound bad from audio perspective without ULF but it for sure a bit different experience. From a certain perspective to be in a room with U...
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