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Some manufacturers also attached other letters to the end of the date code to indicate day of the week, work shift, serial number, lot number, etc.The EIA only specifies manufacturer and year/week code.It'd be awesome if you could upgrade to a modern browser, especially Chrome and Firefox as that is the best out there right now. You might find some of the information useful in determining which speaker would be best suited to your application.The picture is a section of the basket rim of a speaker.

Those letters tell you more about the cabinet and we’re here to help you figure out what it all means.

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Unfortunately, this means you can't get the full experience. This page is a collection of odds and ends information relating to speakers and speaker implementation.

In later years, the EIA converted to a 4 digit date code so the year could be easily identified.

There are 2 acceptable methods of displaying the EIA date code, with or without a hyphen between the manufacture code and the year/week code.

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