Jbl Serial Number Lookup
Where is the serial number located on my speakers? The serial number for your speakers is usually located on the terminal tray, where you connect in your speaker cables. *Serial number Some of our products do not have serial numbers. In this case, enter the date code from the product box or the back of the unit.
This page is a collection of odds and ends information relating to speakers and speaker implementation. You might find some of the information useful in determining which speaker would be best suited to your application.
Speaker Codes And What They Mean The picture is a section of the basket rim of a speaker. 
The 6 digit code indicates what manufacturer made the speaker and when it was made. Axn seriale. It is called the 'Manufacture Date Code'. Here is a list of some of the speaker manufacturers and their EIA codes: Credence 117 Plye 1098 Rola 285 Eminence 67 CTS 137 EV 649 Oxford 465 Altec/Lansing 391 Utah 328 Quam 270 Jensen 220 Weber 1279 Cleveland 433 So, the speaker in the image above would have been made by Jensen (220) during the 27th week of 1951 or 1961.
The year is confusing because it is only a single digit. 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. 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.
Anything else is at the discretion of the manufacturer. Speaker Implementation and Amplifier Configurations If you would like to add some info to this list, (any company, any model) feel free to write us with the info.
Jbl L100 Serial Number Lookup
Amp Model Amp Config Speaker Configuration Replacement Speakers Ampeg Gemini I '64-71 2-7591 Cath Bias 20W 1-12', 8 Ohm Jensen C12Q, C12N Jensen EM1201 JBL D-120F 12A125, 12F125 12A150, 12F150 Ampeg Gemini II '65-71 2-7591 Fixed Bias 30W 1-15', 8 Ohm Jensen C15N, EM1500 or EM1502 JBL D-130F 15A150, C15N Ampeg Super Echo Twin '63-64 4-7591 Fixed Bias 30W mono 15W per side 2-12', 8 Ohm Jensen C12Q or EM1201 12A125, 12F125 Ampeg B15N '61-67 2-6L6 Cath Bias 25W 1-15', 8 Ohm Jensen C15N Cleveland, CTS sq mag. Altec, JBL D-130F 15A150 for guitar Bass15F for bass Ampeg B15N '67-79 2-6L6 Fixed Bias 30W 1-15', 8 Ohm Jensen C15N Cleveland, CTS sq mag.