The JBL Eon Baffle Speaker Story
By: Bob McClintic
For the full technical story on the JBL Eon speaker visit the following link.
Actual speaker dimensions: (H x W x D); 27 in x 17 x 17.5, (686 mm x 430 x 444 mm)
For complete physical and electrical specifications visit:
And Now, The "Rest of the Story"
(Or, how to give birth to a twenty pound speaker)
The Eon baffle was one of the most difficult aluminum castings I have ever produced. But let me tell you how it all started.
In 1993 I was appointed Technical Director for a company based in
In 1994 I was invited to the Northridge,
To add a little humor to the project, it was code named the Simpson project with the two speakers being named Bart and Homer after the Simpson cartoon on TV. The names were selected because the profiles somewhat resembled those of the cartoon characters. Homer was the larger 15" speaker, Bart the smaller, 10" speaker.
I provided key casting design guidelines to the designer who then disappeared to his office for a few months to complete the design.
The local staff continued to manage the project as the die cast mold was built and preparations were underway to process the castings.
Meanwhile, I carried out assignments in other divisions.
Now, we'll fast forward to the arrival of the completed mold.
Homer gained a little weight during the construction of the mold as there continued to be innovations and changes. So many that years later when it came time to build a replacement mold, there was not one completed design, but an original with pages and pages of additions and modifications.
The casting that began as a fairly plain flat casting, had now become rounded, deeper, more complex and about 25% heavier than the original concept. (Finished weight was 14 pounds (6.35 kilograms). The complete "shot" weighted around 20 pounds, (9.07 kilograms).
When the tool arrived, the entire attention of JBL was on the die cast company to produce the initial sample parts. Coincidentally, it also happened that the President/C.O.O. had scheduled a staff meeting of all the Directors and Vice Presidents at the
Since then the castings have been produced on a daily basis and life returned to normal for a while. (To see what happens next click here).
If you have a fast track project you need expedited, contact us for engineering and project management assistance.
Contact Bob McClintic @: RMcClintic@DrDieCast.com
Updated: February 2009
Copyright Bob McClintic and Associates, 1991, to 2009
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