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In the Forum: Horn-Loaded Speakers
In the Thread: Another electromagnet driver: Great Vintage Loudspeakers.
Post Subject: Great Vintage Loudspeakers driversPosted by Nagrapex on: 5/20/2009
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These are clearly JBL pots and back covers (which have been milled flat). The refinishing job is quite nice, but the origins are clear. Also, the phenolic diaphragm is clearly for the 2482/2485 (and looks like a JBL part), which has a slightly wider gap than that of the very similar aluminum diaphragm 2440/2441. The 2482 is cheaper on the used market and will accept the 2440/2441 aluminum diaphragm, so I would guess that 2482's are the starting point. I am willing to bet that the original phase plug has been retained. I think it would be prohibitively expensive to build this at $1,800 per driver.
The 2440 is the pro version of the 375, which was designed to be a permanent magnet version of the 594A. The throat, phase plug, gap geometry, flux density may not be exactly the same as a 594A, but they should be fairly close.
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