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ajsons

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Everything posted by ajsons

  1. Q-man, You said you installed legs on your Deans and now using them in vertical config. Do you have pictures?
  2. Directivity A horn provides more sound pressure level (SPL) at a given listening area by increasing the directivity of the sound towards the listener. There is more sound at the listening area, and less sound outside of that area. By analogy, think of focusing a beam of light (from a flashlight or torch). A widely focused beam spreads the light around, reducing the intensity at any one point. However, a narrowly focused beam provides much more light intensity at the center, and much less in the surrounding area. Consider a point source speaker driver hanging high up in the air. Sound will be radiated off in all directions. Now if we sit the driver on the ground, it has only half the area to radiate into, and acoustic power will be increased by two at any position. If we place the driver at the corner of a floor and a wall, we now radiate into quarter-space, and SPL is increased by four times. Likewise, a driver in a corner will be constrained to one-eighth of the free space area, and SPL is eight times louder. Each of these increases the directivity. A horn increases the directivity of the compression driver, providing increased SPL in a certain area, over the frequency range for which the horn is designed. The "certain area" is actually a cone with a particular cross-sectional shape and angles describing the spread of the cone away from the driver. Round horns produce round cross sections with a constant angle of spread (for a given frequency). Radial horns have two angular components: a vertical and a horizontal spread. Often the vertical angle is small (compromised) so that the horizontal angle can be large (covering a wider area for an audience in a horizontal plane). However, round horns and radial horns tend to change their angles of spread (their directivity, measured by the directivity index, or DI) as the frequency changes. This means that high frequencies, for instance, might be more highly directed, and therefore sound louder to someone in a central location than to someone else outside of the center (but still within the horn's low-frequency area of enhancement). To cope with this problem, the constant directivity (CD) horn was invented. The CD horn provides the same SPL at all frequencies within the designed coverage angles. http://melhuish.org/audio/horndriver.html'>(The above is from the internet).
  3. I needed a replacement terminal block for my N3 crossover, with soldering pins protruding inside the box, searched all the electrical catalogs at the office, but nobody sells them. Then I found out (thru closer inspection) that those soldering terminals are the same ones Al uses, and I had them the whole time. @#%^&*(&). You buy the terminal board and soldering terminals (make sure they're the same type..Y141 or whatever), remove all the screws from the term board, insert the soldering terminals thru the holes, screw them in place and presto! (No wonder they're on the same Mouser catalog page). Al, was that another one of your secrets? No more secrets, Al. That's another internation-AL law. Armando
  4. Bernie, These pictures are great. Thank you for taking the time to travel miles away and take these pictures. That woofer magnet cover looks like it's very close to the doghouse panel. What's the clearance in between? I "built" the Dean on paper (in AutoCAD) using the plans that I have and the woofer ended up touching the doghouse. I know some of the cut angles on the plans are wrong, and I need to make adjustments. Maybe you have another picture from another angle that shows the clearance. Can you comment on the quality of construction? Also, do you think the panels need bracing? Armando
  5. Lorenzo, Was the 511B damped or undamped when you tried it? I tried an undamped 511B on my SK, and didn't like it that much because "it rings like the Liberty bell", as one publication described it. There are many ways to cure that if you haven't done so. And when you do, you'll probably like it. I tried the cobreflexes too, they are also very good horns. There was a thread two or three years ago, called "Installing Mike's 511B" that has a lot of comparison info on these midhorns (and mid drivers). I presently use the SM120's, one on my SK, and one on a University Classic, and they're my preference. Here's a spec sheet. It says 500hz is its usable low freq, but EV has used it at 400hz with a 12db/octave cross in their Sentry IVB (it has a bass horn), and 3500hz for the EV T35. Also, check the first pictures on this thread. http://forums.klipsch.com/forums/657097/ShowPost.aspx I have not heard ALK's trachorns. Once I get enough money saved, I'll get a pair.
  6. Great! Have a nice trip, Bernie. I e-mailed the seller and gave him the link to hifilit.com. He changed the name to "Dean". No bids, so far.
  7. Dana and Qman, We have a forum member who's going to take some pictures of a factory made Dean this weekend, inside and out. We'll probably see the pictures next week. That will be interesting. Armando
  8. 37 1/2 wide, yes you're right. Decware's bikini girl (Bambi?) will probably fit just like she does in their Imperial.
  9. Looks like a Dean to me. The seller calls it Acoustic Baton, (we all know that's the crossover), doesn't know what's inside, "cabinet has not been opened". Too bad it's on the west coast. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5865291800&sspagename=ADME%3AL%3ARTQ%3AUS%3A1&rd=1
  10. And finally, from Speaker Builder journal.
  11. The rest of the sheets were in bad shape, so I redrew them by hand and dimensioned the pieces based on what were readable.
  12. Seti, count me in on the zip file, too, por favor. And TNX a lot.Armando
  13. Maron, Does your plan set have a list of materials? Mine doesn't. Drawing sets normally come with an LOM . The Hartsfield's first sheet is an LOM, and that's what I use to translate some of JBL part numbers for the Paragon's hardware. Other ones, I just have to guess. I find it hard to believe that a drawing set as large as a Paragon's would not have an LOM.
  14. I spoke to a Paragon owner a year ago, and he was not happy with his. He says it's not good for all kinds of music, prefers it on classical, but not rock. To me it means what Maron is saying. It sure looks good, though. The bass horn of the Paragon looks more like a bent horn than a folded horn. Here's a rear shot.
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