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Hornresp 2446 Tractrrix

71.229.18.73
Posted on January 11, 2021 at 09:53:12
ACMINC
Audiophile

Posts: 25
Joined: April 13, 2012
 1. I have a pair of JBL 2446's
2. I want to build a tractrix horn for these.
3. There are no T/S parameters in print anywhere to be found.
4. Throat is 2 inch so S1 is a known value
5. I want a lower cut-off of 800Hz
6. I have the room to build a full size (Length and Mouth) horn

Now in using Hornresp and only knowing S1 how do I get Hornresp to determine S2 and L12 for me?


 

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RE: Hornresp 2446 Tractrrix, posted on January 12, 2021 at 13:02:44
claudej1@aol.com
Audiophile

Posts: 817
Location: Detroit
Joined: August 17, 2007
 Why not just buy a JBL "elephant butt cheek" horn that was designed for that very same driver? It has a rolloff at about 700 Hz. without EQ and has good dispersion out to 8 Khz. It's the second best sounding horn I've ever owned. E Pluribus Unum.

 

RE: Hornresp 2446 Tractrrix, posted on January 12, 2021 at 16:10:42
mnawaz3@aol.com
Audiophile

Posts: 502
Joined: March 28, 2002
 volti sells a wooden horn with tractrix flare that can bed used above 600 (or 500 if you like to stretchhhhhh your luck) . its wooden. and reasonably priced. its based on edgars design. it should work well with most jbl 2" drivers. its shape is more manageable than edgars salad bowls. i think volti's horn takes into account jbl throat exit angle (10 degree).

 

RE: Hornresp 2446 Tractrrix, posted on January 12, 2021 at 16:16:14
mnawaz3@aol.com
Audiophile

Posts: 502
Joined: March 28, 2002
 also, i should say it behaves well and can be used in a domestic situation without too much taming efforts

 

RE: Hornresp 2446 Tractrrix, posted on January 13, 2021 at 04:29:09
Scholl
Distributor or Rep

Posts: 1358
Joined: March 8, 2001
 If you want to ditch the JBLs for a more modern driver Faital Pro has a 1.4" Tracktrix horn for low $$ that'll work to 800 very nicely.

 

RE: Hornresp 2446 Tractrrix, posted on January 13, 2021 at 15:03:26
mnawaz3@aol.com
Audiophile

Posts: 502
Joined: March 28, 2002
 in my experience most modern pro-audiot drivers aim to be part of a 2-way system in order to eliminate the need for a tweeter . they tend to favor the region above 800. for me, the real horn magic starts at 450 so the older drivers are more interesting . adding a tweeter at 4000-7000 is not harmful for my health.

 

RE: Hornresp 2446 Tractrrix, posted on January 14, 2021 at 03:50:30
Scholl
Distributor or Rep

Posts: 1358
Joined: March 8, 2001
 True, it's very hard to find great midrange cones or domes. Only a few are easily bought and can be as pricy as horns.

 

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