audiojerry Posted December 12, 2018 Share Posted December 12, 2018 I'm looking for an adapter to mount my K-55 compression drivers to the Eliptrac horns. I partially completed building the horns and couldn't wait to try them out with my 1979 La Scalas, and I am blown away by the results (more to come on my project), but I had to fashion a cludgy temporary mount. I am hoping someone knows of a screw-on mount that would work with the 2" Eliptrac opening. Dave Harris recommended the PRV ADM25-50 from Parts Express, and I found the Eminence S2B-A Aluminum 1-3/8"-18 TPI Screw-On adapter. Would either of these work, or is there another solution? Thanks for your help! Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted December 12, 2018 Share Posted December 12, 2018 1 hour ago, audiojerry said: Dave Harris recommended the PRV ADM25-50 from Parts Express That is the correct 2" to 1" threaded adapter for your application. $6 each. The Eminence screw-on adapter will need a separate 2" to 1" bolt-on adapter. 1 Quote Link to comment Share on other sites More sharing options...
audiojerry Posted December 12, 2018 Author Share Posted December 12, 2018 Thanks for the help! Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted December 12, 2018 Share Posted December 12, 2018 You will also need some mounting hardware and to cut out a paper or foam gasket to mate up with your horn. Quote Link to comment Share on other sites More sharing options...
audiojerry Posted December 12, 2018 Author Share Posted December 12, 2018 3 hours ago, Khornukopia said: You will also need some mounting hardware and to cut out a paper or foam gasket to mate up with your horn. The gasket part would be easy. The plastic body(?) seems like it could resonate. Should some kind of damping treatment be applied to the outside? Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted December 13, 2018 Share Posted December 13, 2018 The adapter is rigid enough that it should not resonate. You can wrap some Dyna-Mat if you like, I use the material on most of my mid-range horns. 1 Quote Link to comment Share on other sites More sharing options...
audiojerry Posted December 13, 2018 Author Share Posted December 13, 2018 (edited) I'm realizing I've got a lot to learn about horns, and how important each lesson can be. In my enthusiasm I couldn't wait to install the Eliptrac and try it out before it was finished. I later realized that my cludgy attachment of the K-55 directly to the Eliptrac not using an appropriate mount with correct aperture opening and dimensions grossly colored and darkened the sound. For experimentation sake I added a few layers of gradually expanding 1/2" plywood increasing the length of the throat by 2 1/2 ", which greatly improved the results. I'm sure that using the PRV ADM25-50 will result in significant improvement. But I will have to wait 4 months before returning to Wisconsin from my warm winter hideout in Arizona. Edited December 13, 2018 by audiojerry Quote Link to comment Share on other sites More sharing options...
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