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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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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[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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[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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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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Hi Romy,1) What dimensions for 1808 baffle would you suggest? 2) Is floor-firing vs. front-facing cone useful or preferred?I believe you wrote LF channels should be placed in arc outside midbass channels. 3) Any *general tips...
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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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[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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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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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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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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Hi Romy,1) What dimensions for 1808 baffle would you suggest? 2) Is floor-firing vs. front-facing cone useful or preferred?I believe you wrote LF channels should be placed in arc outside midbass channels. 3) Any *general tips...
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[quote user="NBC"]Hi Romy,1) What dimensions for 1808 baffle would you suggest? The Golden rule is: 1.6 height, 1.0 width, 0.6 depth. 2) Is floor-firing vs. front-facing cone useful or preferred?I wouldn't use the 1808 or 8196 in ...
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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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[quote user="Knightcrawler"] The 1808 was designed for a large vented enclosure. Just looking at the TS numbers would indicate a large vented box to be best. It also worked well in horn loaded designs as well. [/quote]I did not says what it was desig...
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[quote user="Romy the Cat"]
Knightcrawler wrote:
The 1808 was designed for a large vented enclosure. Just looking at the TS numbers would indicate a large vented box to be best. It also worked well in horn loaded designs a...
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[quote user="NBC"] 1) What dimensions for 1808 baffle would you suggest? [/quote]
It would be easy to circulate from the resonance frequency of the driver. The 1808 marked at 24Hz but in practice it could be anything from 23 to 29Hz. Since you...
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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="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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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 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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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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Hello NBC,
If you have the space, and the sense of humor, go with a large pair of SEALED enclosures.
If done right, it will change your life.
Regarding the Northcreek Audio version of the 1808 : According to some research I did a while ago, ...
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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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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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Although all of it has no relation to digital crossovers but still:
[quote user="cv"] On a vaguely related note: I dunno if you realise this, but conventional (ie excluding horn or large area ESL) speaker systems, even if measuring flat amplitude, i...
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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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Three problems with the Scan-Speak are the low X-max, the built-in response curve, and limited power handling. It will be interesting to see how you juggle these issues if you do use these guys for LF. Obviously, if you bias against the natural ris...
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