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In Reply to: RE: Tracktrix Horn Upgrades posted by Paully on July 17, 2016 at 12:58:50
what's your crossover frequency ? - - there should be two Klipsch K703 in my mess - I think I'm looking at one - unless am confused vs a generic horn (? - have a lot of "lenses" called that by places like MCM) - -very small horn - only ~4.7" from throat to mouth. Mouth ~8.5" x 5.5" - there's a slow flare conic throat which looks ~1.2" in length. K703 is described as a tractrix horn. K703 were 1 3/8 tread so would require a thread to bolt adapter for your JBL. I don't know if there's much "acoustic" EQ with a 703
Karlson Evangelist
Edits: 07/19/16 07/19/16Follow Ups:
Crossover frequency is yet to be determined. I am thinking 500hz as I heard a pair of JBL 2420 crossed over at that point and they sounded fantastic. Thinking I will use an active crossover that has the ability to switch crossover points easily so I can experiment. I have larger Altecs I can play around with if I really want to. For this I am really thinking I would like a large, round horn. But thanks!
Large round horns are immediately addicting, right ?
Well, I suppose a person will only answer "yes" if that's the sound he is after. To support 500Hz, a tractrix horn has to have a flare rate much lower. Bare in mind, the large round wooden horns you heard, are SB 140Hz flares. Granted, they are capable of much lower operation, but he loves those JBL drivers. You would need a minimum of a 340Hz flare. And then there's the crossover question. Next, what do you use below said horn ?
Horns sound their very, very, best when used with other horns. The beauty of your current Altec 19's is that all the fundamentals are being reproduced by the large Altec cone driver, and the harmonics and over tones by the horn with it's obvious characteristic of controlled directivity.
There are many paths to audio nirvana, but each path has it's own set of design challenges. Paul, it was so nice to have you visit us, in our East Tennessee region. There are many more systems to audition. Please don't be a stranger !
Scott, thank you for having me over. I absolutely loved your system. When I actually get ready to buy a set of horns in next few months I will make sure to check with you and Lawrence and verify that everything is good for what I intend.
I picked up one JBL driver and have another in the works. As far as below the horn, the plan is to use my Altec Model 19 woofers to start. They are connected to an outboard crossover, so it is extremely easy to hook them up to an amp and back to an active crossover. That's the plan at the moment.
Of course I don't cross them over that low..
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
I bought two active crossovers that have the ability to just flip the crossover point, so if 500hz doesn't work it isn't too hard to do something else.
I've got some baby "Paragon" style horns - oval - pea shooter type - smooth and lots of acoustic eq on-axis from beaming ;^)
Karlson Evangelist
will try to find one and get a picture - I think you could have some beaming from a long and slowly expanding Tractrix
Karlson Evangelist
Too funny. Do you have a picture of them?
Paully,
You can also go to WWW.diysoundgroup.com. They have various wave guides / horns made of fiberglass by autotech.
The more options the better. Thank you. I am getting ready to move now, ao when I get settled I am coming back to this thread and I am going to pick one and get to it. Thanks!
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