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ajsons

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Posts posted by ajsons

  1. (Amy, I promise, no baseball bats!)

    TigerwoodKhorns is probably the first on this forum to try to jubilate (or is it jubilize?) a Khorn (a clone, to be exact). I can't find the thread, hopefully he'll chime in and lead us in the right direction, but on that thread, he tried to bend the exit paths of an SK to bring the mouths together, like a Jub. I thought it was a very clever idea, and I kinda helped, using autocad. Gil, though had concerns about its effectiveness as the bends were happening at the last six inches or so of the mouths.

    (I have several drawings to post, so let me finish first, before posting, or making a comment. TNX).

    post-14184-13819354370234_thumb.jpg

  2. that's a bummer on the voice coil rubbing part, and great that it fits..i know how much you like that woofer. may have to try that too, gotta get mine out of storage..and tnx for the warning. i'll try not to push them too hard. fifty watters, if i recall correctly?

  3. Edgar

    You and I have some things in common. I play a lot too with AutoCAd, and try to come up with new horn foldings and use the EV's that I have (15's).

    As far as the Jubilee, i don't think there is much anyone can do to improve that design.. There is not a lot of folded bass horn that can get that freq coverage. It's a simple folding, practically no wasted space, and easy to build (no compound cuts). I thought of a couple of mods, but they're probably not worth a dime.

    The 3 flare rates were not the design goal (a single one was) but were trade offs. Roy and Paul knew exactly were compromises can be made. Designing your own folding and trying to match the Jubilee flares, or any horn, will not guarantee that it will perform like the original. I stick to one flare if I can.

    I thought of Jubilizing the Hartsfield, since the footprints are close, and two-driver Hartsfields had been done, but it's going to use more wood panels (more complicated) to accomplish the same. Forget that idea.

    I haven't listened nor seen a Jub in person, I envy those who have and own a set.

    Here's one autocad idea, though.

    The Jub uses 3/4 plywood. If you have a set of plans in autocad, you can scale it down 0.8333333, and use 10-inch woofers (if you can find 10-inch woofers with good T/S parameters for horns. There is not a lot.) The flare rate Fc will go up, and so will the low end response, and will be a smaller version.

    If you scale it down to .6666666666666, then you can use two 8-inch woofers (they're easier to get), and use 1/2 plywood. Again, it'll be smaller, with a higher Fc, probably around 70hz.

    (For non-autocad people, scaling an entire drawing in autocad only takes about 5 seconds).

    The height is easily adjustable if you want a specific flare freq, and the non-expanding channels can be lengthened or shortened if needed, to adjust the throat/throat initial section.

    The folding remains the same.

    I do have an alternative folding for the Khorn and Jub though, that I will post one of these days, that may qualify. It is also, unfortunately....plug ugly!

    AJ

  4. I asked Amy to delete D-man's thread ("Armando is PO'd at me", around late March,early April this year.). He stole my design, plus others., including this one that he applied a patent for. And yes, I was very PO,d and posted phrases that should have not been posted. So I requested to delete it.

    D-man went into hiding...And has not been "seen" since.

    Guilty.

    Just a plain thief.

    Designer, he is NOT.

    This thread started in 2005. If you look back on page 2, I posted a page from Edgar's midrange horn article which is a lot like D-man's "design" (right!!!). Then he posted the Elephant horn drawing, saying he did something like that in 1975. I thought, and probably some of the readers, too, that he meant he designed something like that in 1975. Actually, that's where he copied this horn from. Here's from his email.

    "Here is the 1973 "Elephant Horn" - I bought one from the bass player in our band (at the time) and built the other to match.

    The designer was a hobbyist who called them "Elephant Horns" - he had 2 cabs stacked and a boat load of high freq. horns on top to compete effectively. I remember them as being real butt kickers - LOUD is all I really remember."

    "and the fact that I arrived at the same conclusions as the Elephant horn designer did way back then is not something I'm real happy about - there is nothing new under the sun - except some refinements!"

    Yes, it was just copied. and he applied for a patent for it. There is nothing about this horn (what he calls the V2) that qualifies as an invention..

    Here's the email in its entirety...

    From: dmoore@wpas-inc.com [mailto: dmoore@wpas-inc.com ]
    Sent: Tuesday, August 15, 2006 3:10 PM
    To: armando_senson@amsec.com
    Subject: V2 TWIN B (one of my favs) VS. the 1973 "ELEPHANT HORN"

    After all these years, I come back to the original design from my youth [bUT NOT INTENTIONALLY]! A friend from high school bought them way back when, and he's still got them! They still work. Note the fabulous Eagle logo of Moore Speakers as well as the luxurious original automotive trunk paint finish. Unfortunately, I only did the logo on one of the cabinets, don't ask me why! They looked better 30 years ago!

    Anyway, the TWIN B is a modified and technically more advanced version actually arrived at in a round-about way, the Elephant horn did not really have anything to do with the design, except that the V2 used the same folding pattern. But it is clear that it is not really that different in overall layout, and the fact that I arrived at the same conclusions as the Elephant horn designer did way back then is not something I'm real happy about - there is nothing new under the sun - except some refinements!

    The reflectors combines with multiple flare rates should allow for a higher crossover point and usable band width, but the channel dimensions at the throat are the same as the 1973 horn. But the sizes involved (channel width, front baffle, etc.) are dictated by the corner and the overall Fc and required Vb for the drivers. Not much difference there, except for maybe the new one being a tad smaller in footprint.

    It's an improvement, but its not really new, nor does it feel like it is entirely my own design. However, it is technically proficient, and is a guaranteed performer as it sits. It's also a very easy build, as far as things go.

    Here is the 1973 "Elephant Horn" - I bought one from the bass player in our band (at the time) and built the other to match.

    The designer was a hobbyist who called them "Elephant Horns" - he had 2 cabs stacked and a boat load of high freq. horns on top to compete effectively. I remember them as being real butt kickers - LOUD is all I really remember.

    I've never scientifically tested the V2's, and they certainly SOUND great, but I suspect that they aren't as smooth as I would feel comfortable having somebody else test them seriously and publish. It's rather hard to tell, they DO sound good, better than Khorns, but that is why I keep searching for the Holy Grail of folded corner horns.

    I want something that I won't worry about somebody testing, and something I would feel confident in offering for sale.


  5. I bring this up becauses someone long ago had posted information on the Klipsch Belle. The configuration claimed therein for the Belle was similar to the 4025. In reality, of course, the Belle is a slightly morphed LaScala with the well known configuration of the LaScala.

    It is interesting that the plan view of the TL 4025 shows dimensions almost twice that of the Belle. Therefore the configuration can not be easily adopted unless you're using an 8 inch driver (i.e. half size basket).

    Best,

    Gil

    Gil,

    Maybe he was referring to the EV Eliminator, and not the TL4050.

    Here's an EV Sentry IV, which is a scaled down (dual 12") version of the TL4050.

    post-14184-13819330285252_thumb.jpg

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