Dating fender twin amps

08 Apr

1968 was a transitional year for Fender amps, with tone that was still pure Fender but a look that was brand new.

With a silver-and-turquoise front panel and classy aluminum "drip edge" grille cloth trim, the Twin Reverb received a fresh new face as it remained the backline amp of choice for pros and amateurs everywhere.

In the silverface era Eminence, Oxford, Utah and Rola were more often used and Jensen was phased out.

Even at we struggle with keeping a correct amp and speaker model overview.

Clear, deep and powerful, it produced big tube tone, with world-class Fender reverb and vibrato effects.

For countless guitarists ever since, the Twin Reverb has been the go-to amp for classic Fender sound.

Whether it’s a vintage amp or a recent model such as this Fender Pro Reverb, hum can have several causes.

In a BF Vibrolux Reverbs you could have either Jensen, CTS or Oxford, the BF Super Reverbs had Jensen, CTS, Oxford or sometimes JBL, the BF Pro Reverb had Jensen, Oxford or Utah, .

Other things to look for include chasses placed in cabinets from a different year, “doctored” tube charts, non-original control plates (usually reproductions) on silverface amps, original transformer bell ends (they have correct date codes, of course) on non-original transformers, and non-original knobs (either repro or silverface knobs on blackface amps).unusual things can be found such as the empty “Pulse Adjust” hole on the rear of early ’60 brown amps, the “middle” volume control, use of tweed style grill cloth, strange non-documented transitional circuits, and changes in tolex color including the super-rare cream colored “brown” tolex that is found on some late ’60 amps. Given that people may refer to this information seeking specific production quantities of amps they are curious about, it should be pointed out that the serial numbers apply to chassis types, and not specifically to amplifier models.

Looking at serial numbers next to the ’60 5G5 brown Pro Amp for example, we see numbers ranging from 00001 to 02000, suggesting that there are 2000 of these amplifiers made in ’60.

You should be able to find a number stamped somewhere on the speaker’s frame.

The format may look like this: 220 637 Here the number 220 designates the speaker as a Jensen, and 637 indicates a production date of the 37th week of 1956 or 1966.