Jbl Serial Number
Hi Scott, It is kind of rare to find factory installed JBL 120F's in a twin but not unheard of. Supposedly, if they are original to that amp, they would have an ink stamp on them that matches the stamp on the tube chart inside the cabinet.or a stamp that would be a code like AA2565.25th week of 1965. Unfortunately these stamps are not always on the speakers and are sometimes on the cabinet, or on the inside or outside of the chassis. Another clue on a later 60's speaker might be a tiny F punched into the foil label. In the end, only your ears matter.
JBL's are universally considered 'hi-fi'.very clean, good bass but perhaps a bit harsh on the treble side.brittle maybe? I had a factory JBL equipped twin for a very short time. It was a late 68 production with gray framed JBL D120F's in it and the factory JBL badge on the grille cloth. Absolutely mint.
I sold it because, for me, it did not sound good. It was a kind of sterile amp. For some sounds it was a perfect, like stepping back through time to a Memphis recording studio. Clean, clean clean. Good with a tele for country.
If you prefer your sound a bit dirtier, or perhaps, looser, the premium price of a JBL equipped black twin might not be worth it. Thank you – great response and much appreciated!This Twin does not have a stamp on the tube chart that wouldmatch the pattern you listed. There are two stamps on the tube chart:Production “58” and “PG” stamped near the bottom right.Unfortunately I only have pics of the amp to go on for a few more days. Thepics I have are, however, very high resolution and cover almost all of thespeakers + cab in the back. The speakers and do NOT show an “F”imprinted on the foil label of the speakers.
I have the serial numbers on thespeakers and, from what I’ve been able to gather, they look to be from aroundthe same time as the amp (1965). Unfortunately the pics do not really includethe cone (so I can’t see any stamp on the cone).The frames are gray with yellow JBL on the driver. Serials are 117xxand 120xx (where “xx” is a number). They say “signature speaker”across the top (but not “Jim Lansing signature speaker” like the ‘61sapparently).And I’m with you on the “ears” bit – I won’thesitate swapping these out if they aren’t what I want. I’ll justcarefully pack them up and, if I ever sell it, they’ll go with it andmake it a premium cost J I have a pair of Tone Tubbies in my 73 Twin that are amazing –maybe they’ll be great in a ’65 too. I hope to find out!I appreciate your time on this, Kevin – thank you for anyinsights!Scottkevin13.01.10 20:28.
It is highly likely the chassis was made in '65 and the amp assembled in '66.however, with it being JULY of '66, this scenario becomes a bit less likely. Ask the seller if there is a PG inkstamped somewhere inside or outside the chassis.Ask the seller for all the #'s off the transformers.IE: they should all be 606-6xx.or 606-6-xx.the X's represent the week of the year. They should all be starting with that 6 for 1966 after the 606 which stands for Schumacher. Also, does it say Fender Electric Instruments or Fender musical Instruments under the Twin Reverb Amp logo.post 1966 it would say 'Musical' not 'Electric'. I ended up not buying it.
I found another ’65 that isthree serial numbers away from the one I was looking at and the date stampshowed September ’65. Given the serial numbers, that makes sense – thechassis was probably built in Aug/Sep 65 and then put into the cab immediately.I have a tough time believing that Fender “lost” this chassis foralmost a year. And it says “Fender Musical Instruments” on the stampalthough, to be fair, I’ve seen Greg G’s saying that this was putin place in early-to-middle ’65 inconsistently but in ’66 consistently.In the end I thought it was too hazy (as you put it) and, sincehe wanted a premium price for a ’65, I bailed.Thanks for your help!kevin14.01.10 10:00. It gets more interestingTalked to seller originally and he said he purchased two 1965amps at the same time from same buyer in 2000ish. I presented my “findings”to him and he sent back pics of the other amp – it has the right datestamp (along with “Fender Electric Instrument Co” on tube chart)and ’65 number. However, the true ’65 cab has a 12” JBL D120Falong with a 15” JBL D130F.I think I know the answer to this question but I’ll poseit here for verification: is there any way that the 15” speaker isoriginal (i.e.
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A custom order)?Thanks!kevin15.01.10 09:01.