Dating vintage jbl speakers
The number 371 indicates Altec Lansing and 794 represents Harman Kardon. The first two digits after the manufacturer three digit code indicate the year.
Speakers made before the 1970s only have one digit representing the year which is misleading.
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.
Carefully turn the speakers around so that the back of the speaker is facing you.
Inspect the back of the speaker for a sticker that has digits or letters on it.
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This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Per manufacturing regulations, the makers of electronics must include a minimum amount of production date information on their products.Depending on when the speakers were made this information may simply include a year and week or may be more specific, down to the day or hour. It looks like you are visiting our site on a browser that is really old.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.