DRAWING ON AUTOCAD THE HORN OF THE ICONIC ALTEC LANSING LOUDSPEAKER VOICE OF THE THEATER A7

Jose Mujica ()
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Jose Mujica: Escuela Superior de Audio y Acustica, Venezuela

Journal of Information Systems & Operations Management, 2025, vol. 19, issue 1, 211-225

Abstract: The horn Altec Lansing model H-811B is one of the main components of the loudspeakers A-7 and Model 19 of this milestone brand. It is not usual that lovers and collectors of a brand of loudspeakers have Internet sites with over 100K followers 44 years after stopping the manufacturing of these classic models. Nowadays, we find that some followers have opened factories to build them anew. However these facilities have made the low frequency woofers and mid-high frequency drivers, but not the horns and the boxes. About the boxes, the blueprints and its construction do not represent a major challenge, after all, in more than 75 years of the first model of the Altec Lansing series Voice Of The Theater, a legion of follower have learned how to make the wood curves as the original. But the cast aluminum horns are a different matter because of the difficulties involved in their process. Some of the followers have built them using wood and Fiberglass horns but very few using aluminum. Neither of the blueprints found have information about the curves of the horn, only the lineal dimensions. For this reason and knowing that there is not a 3D AutoCad drawing on the Internet of this horn, at least one that I could find, I decided to write a method that can be helpful to draw a prototype model that could help enthusiasts and collectors to build the horns using aluminum.

Date: 2025
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