A81000 to A99999 — 1975. Brought to you by Techwalla. A14700 to A18700 — 1967. P00100 to P00900 — 1961. B01000 to B15000 — 1975.
Jan 31, 2008 11. However, the next article in this series Part 4 will discuss some preliminary production trends oh boy! Eminence has its roots in CTS Mr. The companies also needed to produce speakers with long term reliability, so they doped the surrounds.
Dating a JBL Speaker
These are generally made to Fender's specifications and in some cases, such as the reissue '65 Twin Reverb, the speakers were designed to emulate the Jensen C12N speakers which were often found in the original '65 Twin. Look at the remaining digits. To make things more interesting, there were two versions of the 6G9 6BQ5 circuit. After April 1968, most of the big Fender amps received the AC568 circuit, which is a semi-cathode biased design. A00400 to A00900 — 1963. The decals on each speaker are numbered consecutively, 42119 and 42120 on the other speaker.
First use the cosmetic features to get a range of possible years. A21700 to A25600 — 1970. A05000 to A09900 — 1966. Princeton Reverb AA1164, B1270 silverface.
Another option is to install vintage style speakers. The last three pictures are of the bottom d130f. Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when. So, driving the Twin with any amount of distortion lowers the power handling capacity of the speaker, which makes any speaker more susceptible to damage… even a high-wattage type like the JBL.
Also it's worth mentioning: I'll take the other one. P00900 to P05100 — 1962. Interest in vintage Fender amps really took hold about 8-10 years ago. Again, I would like to thank everyone who responded to our request for data as outlined in Parts 1 and 2.
Jensen speaker models denote their approximate power handling capacity and magnet type. A05000 to A09900 — 1966. Some things are very obvious such as non-original or reconed speakers, non-original transformers, replaced pots, re-tweed, re-tolex, re-grill, etc. Boy, was I surprised to see that the tremolo circuit was wired incorrectly by the factory!!! Since these amps are so rare, it is impossible to comment on the technical or tonal differences between the two circuits.
The Gear Page is run by musicians for musicians. I'll take the other one. R09800 to R11000 — 1966. Vibroverb AA763, AB763 blackface. Generally, the Utah speakers of the '70s weren't as great sounding as their predecessors, but again let your ears be your guide.
In either case, the code works the same. You must log in or sign up to reply here. Here is a cool link to a Vintage Fender Amp price history chart that tracks sales data for specific amp models by the month. The wire from the two 220K ohm bias resistors is connected to the brass control panel ground plate. For example, a code of 7949422 indicates that the speakers were made in the 22nd week of 1994 by Harman Kardon. Champion 600 5B1 tweed.
C06000 to C08900 — 1958. What is the price of JBL speakers? Additionally, the Oxfords from early '60s generally sound very good. The suffix code letter identifies the quality of the speaker. So look either on the box or on the speaker itself. Bassman 5F6, 5F6-A tweed.
The discussion thread on the is here! Next, if applicable look for the date code on the tube chart. The code follows the format: Boy, was I surprised to see that the tremolo circuit was wired incorrectly by the factory!!! A23000 to A25000 — 1970. Wide panel, narrow panel, brown, blonde, and black face amps have a date code hand-stamped on the tube chart.
JBL Serial Numbers
This was the first year for the blonde 6G9 Tremolux. The last two numbers are the year. I'm still trying to make sense of the "mysterious" production numbers and this is one area where I don't have a lot of info… mainly because production numbers were not written on a lot of the tube charts. There were quality lapses in the circuits themselves during the CBS years, some of which had serious consequences. A18700 to A19500 — 1967. In some cases, such as Altec and JBL, the factory would recone a speaker.
I'm curious what their value is? The must-play city building game of the year. A09500 to A09800 — 1975. Generally, the Utah speakers of the '70s weren't as great sounding as their predecessors, but again let your ears be your guide.