Dating vintage jbl speakers
From 1961-1965, this logo appeared on some amps and speaker cabinets, in addition to a plain block logo found on the control panel of the amp.
Starting in 1966, the "Curved C" logo (below right, top logo) began appearing on amps and speaker cabinets, in the form of a metal badge.
I was thinking of trying a Celestion Gold 50, but I usually only play in my bedroom, and I don't want to increase the amp’s volume. Both amps produce very loud hum whether or not a guitar is plugged in. Or is there some other possible cause you can point me to? Most factory speakers in Fender amplifiers have what is known as an EIA code that specifies their manufacturer.
You should be able to find a number stamped somewhere on the speaker’s frame.
Possible culprits include the preamp tubes, the power tubes, the hum balance resistors, and the power supply caps.
As with other Carvin gear, the first, and most obvious, detail to look at is the logo on the amp itself.
The code follows the format: = a number from 1 - 52 indicating the week of manufacture.
Remember, your amp is newer than the newest component.
For example, if you find pots from late ‘64 and transformers from early ’65, you can be pretty sure your amp is a 1965.
The following chart, was originally printed in VG magazine, by Gerald Weber.The JBL L-100 Century is JBLs most famous vintage speaker from the 1970ies and is an absolute classic.