Dating vintage jbl speakers

However, before production began, the relationship with Graybar fell apart.

For reasons that are not entirely clear, Graybar and JBL could not come to agreement on a sales arrangement and all of the products developed for this initiative were dropped.

Fender often used the same circuit for many years so this is not a very accurate method for amp dating.

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If it’s a one digit year you need to determine the correct decade of the amp some other way.

ZZ = a number from 1 – 52 indicating the week of the year.

The code follows the format: XXXYY ZZ where: XXX = a two or three (possibly four on newer amps) digit number indicating the manufacturer.

(see chart below) YY = is a one or two digit code indicating the year.

If possible, open up the chassis and check a few of the pots’ and capacitors’ manufacturer codes.

Remember, many components could have been changed over the years, speakers blow, caps dry out, transformers melt down, and pots wear out.

Graybar wanted a product line that covered the same scope of the previous Altec distribution.

For the first time, with the exception of speaker enclosures, JBL developed products solely intended for the professional market.

The raised “Fender” grille logo lost its tail around 76.

There are exceptions to this rule like the the Bronco.

Serial Number: There is no information readily available for dating Fender amps by serial number but there are people working on it. Circuit Code: In 1963 Fender stoped using model numbers to identify schematics and began using the model name and an assigned circuit number.

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