Duo-Sonic by Fender
The Duo-Sonic guitar was launched by Fender as a student model guitar. It features two single-coil pick-ups and a vertical (as opposed to Fender's standard blade-style) switch on the lower horn of the body to select bridge, neck or both pickups in a humbucking style configuration. The Duo-Sonic features typical Fender construction techniques with a bolt-on neck, maple attached to a solid body. The bridge is fixed and the line has a shorter scale neck than standard models as a concession to younger, beginner guitarists and other players with smaller hands.
The original Duo-Sonic was introduced in 1956. Like the Musicmaster introduced a few months earlier, it featured basic but effective construction and a 22-1/2" scale length (standard Fender guitars feature a 25-1/2" scale) and cost $149.50. The original model was only available in a light tan color called Desert Sand and had a maple fingerboard with 20 frets and a neck with a soft-V profile. The original model Duo-Sonics also sport a gold-colored, anodized scratch plate that helps in screening the single-coil pickups and electronics from interference.
In 1959 the Duo-Sonic went through a face lift. The most significant change was a switch from a maple finger board to a rosewood one in keeping with changes to other Fender models at this time. These fret boards were originally in the slab-style but switched to the veneer style after approximately a year. The other significant change was a switch from anodized aluminum to plastic pickguards. To begin with the second generation Duo-Sonic was still only available in Desert Sand, however, the tan color now used was significantly darker than that used on the 1956-59 models. In 1961 a new color, sunburst, was made available; this color is sometimes referred to as maroonburst for the way it looks today. In mid-1961 the Desert Sand color was dropped and then in mid-1963 Sunburst dropped and replaced by white.
In 1964 the Duo-Sonic was redesigned based on the Fender Mustang that had recently been added to the student model line but without the vibrato tail-piece. The student guitars now all featured larger and slightly offset bodies, necks with larger headstocks and rosewood fingerboards and plastic pickguards with the volume and tone controls mounted on a separate metal plate. Pick-up selection was moved above the pick-ups on both the Duo-Sonic and the Mustang and utilized two 3-position on-off-on switches that allowed for in- and out-of-phase sounds. The pickups were also reverse-wound/reverse-polarity, which made them into a functional Humbucker when both pick-ups were used simultaneously. Also added in this redesign was the option of a 24 inch scale neck in addition to the 22-1/2" scale. This re-designed model was re-named Duo-Sonic II although decals with and without the II designation were used occasionally. In addition to white, Sonic Blue and Dakota Red colors added.
The Duo-Sonic lasted until 1969 when it was dropped most likely because the Mustang with its tremolo tail piece was far more popular.
The Duo-Sonic I and II are both considered rare and have displayed growing collector value. The Duo-Sonic II in particular is often seen as a desirable alternative to the more popular Mustang, since it lacks the difficult-to-maintain tremolo bridge.
