dating vintage jbl speakers

Gladys Hamilton, 21 years old


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Ellington, Connecticut , Ships to: Free Local Pickup, Item: Up for sale is a pair of vintage JBL L speakers. These are some of the most talked about speakers on the audio forums, with good reason. They were produced from to , and are very heavy at 55lbs. This pair functions as they should and sound loud and clear. They have a couple scrapes, bumps and bruises, but are in very good condition considering they're over 40 years old.

Graybar Electric Co. Altec Lansing had been one of their largest suppliers, but ended their relationship in Altec had grown to the point that they wanted control of their own distribution network. Graybar was desperate to replace this major avenue of business and approached JBL. JBL agreed to begin a fast track program to develop a base series of products. Graybar wanted a product line that covered the same scope of the previous Altec distribution. For the first time, with the dating vintage jbl speakers of speaker enclosures, JBL developed products solely intended for the professional market.

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We use cookies to provide you with a better experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy. Possible culprits include the preamp tubes, the power tubes, the hum balance resistors, and the power supply caps. Thanks for your input. I have a Deluxe Reverb and am trying to figure out if it has a Utah or some other kind of speaker. Any speaker ideas on that front? I also have one of the newer Fender Pro Reverb amps with an effects loop and a silverface Twin Reverb with a volume control. Both amps produce very loud hum whether or not a guitar is plugged in. Could this just be bad caps?

Since I primarily collect amps by Fender, and guitars by Gibson, Fender, Martin, National, Epiphone, Gretsch and Rickenbacker, I really can't help them with these other less popular brands. As you have probably noticed, there is plenty of information here to help date the brands that I am interested in. But where does that leave everyone else? Well I'm not one to leave you out in the informational cold, so here's something that I use quite often in dating amplifiers and electric guitars. It's called the "source-date code", and it can help determine the approximate age of an electric instrument by the date its components were manufactured. Source-Date Codes On American made vintage gear, the pots and speakers provide an excellent opportunity to date a piece of equipment by referencing their "source-date code". The source-date code found on pots and speakers gives the manufacturer and date roughly when the components were made. It may have been some time before the part was installed at the factory, but it still provides a good approximation of when the gear was made. The source-date code will signify the earliest possible date that the instrument or amp could have been made. This isn't going to be exact, but it will give you a "ball-park" age.

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. Disconnect the speakers from the power supply and connections before proceeding. If the speakers are in a vehicle, disconnect the negative terminal of the car battery before removing any speakers.