Technology
Alnico
First use of Alnico magnets.
Composed of Aluminum, Nickel and Cobalt, JBL was the industry leader in introducing this strong permanent high power alloy in professional speaker systems.

Alnico magnets produce magnetic field strength at their poles as high as 1500 gauss (0.15 tesla), or about 3000 times the strength of Earth's magnetic field.

First introduced in the D130, 15-inch transducer.

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