First introduced in 1960 as the
Deluxe Model, it borrowed design elements from the
Jazzmaster guitar. It was renamed the Jazz Bass as Fender felt that its redesigned neck—narrower and more rounded than that of the Precision Bass—would appeal more to
jazz musicians. The Jazz Bass has two
single coil pickups with two pole pieces per string. As well as having a slightly different, less symmetrical and more contoured body shape (known in Fender advertising as the "Offset Waist Contour" body), the Jazz Bass neck is noticeably narrower at the nut than that of the
Fender Precision Bass. While the Precision Bass was originally styled similarly to the
Telecaster guitar, the Jazz Bass' styling was inspired by the
Jazzmaster guitar, with which the Jazz shared its offset body and sculpted edges, which differentiate it from other slab-style bass bodies. one volume knob for each pickup and a third to control the overall tone. Despite this new feature, many stacked knob models were made until about 1962. Another feature the initial models had were the "Spring Felt Mutes", which were present on basses from 1960 until 1962. The mutes were designed to dampen the overtones and the sustain; they were screwed in place between the bridge and aft pickup. Those felt mutes were not a tremendous success and were replaced by a cheaper, more simple foam mute glued underneath the bridge cover, as was used by the Precision Bass from 1963 onwards. Over the following years, as the use of mutes gradually declined, both the Precision and Jazz Bass models eventually began to be produced without bridge/tailpiece covers. A number of cosmetic changes were made to the instrument when
CBS purchased the Fender companies in 1965. During 1965/66, the Jazz Bass received bound rosewood
fingerboards with
pearloid dot position inlays (which replaced the older "clay"-style of the early 1960s) and oval-shaped
tuning machines. Block-shaped fingerboard inlays and an optional maple fingerboard were introduced after 1966/67. At first, necks with rosewood fretboards received pearloid blocks/binding, and maple fretboard necks received black. Fender switched to pearloid blocks/binding on all necks in mid-to-late 1973. Fender also switched to the three-bolt neck "micro-tilt adjustable" neck and the "bullet"
truss rod in mid-to-late 1974, before reverting to the more standard four-bolt neck fixing and dot-shaped fretboard markers in 1983. White pickup covers and a pickguard/control plate were introduced the same year. In 1986, Fender introduced the Japanese-made
Fender Performer Bass, also with micro-tilt neck, designed by John Page and intended to be an Elite version of the Jazz Bass; however, the radical styling was not popular and production ceased the same year. Two other changes that were more important to the tone of the instrument also occurred in the early 1970s. From 1960 until late 1970, the two pickups on the Jazz Bass were spaced apart. The bridge pickup was then moved closer to the bridge, creating a spacing of . Many players believe that this change contributed to a somewhat brighter tone from the bridge pickup. According to Fender itself, this change happened in 1972. However, examples can be found as early as 1970 of Jazz basses that use the 4" pickup spacing. Both 3.6" and 4" spacing are found in Jazz basses made in 1971, and there are even a few Jazz basses made in 1972 that use the older 3.6" spacing. Around the same time, Fender began using ash for most of the instrument bodies. Prior to the early 70's, most Jazz basses had bodies made of
alder, except for those that were finished in a clear or ("natural") finish - for those basses, ash was nearly always the wood of choice. In the early 70s, ash bodies became increasingly common, and by 1974 ash bodies were the rule, rather than the exception. Ash is generally thought to produce a somewhat brighter (and correspondingly less warm) tone than alder. By the mid-1970s, the combination of 4" pickup spacing and the use of heavier ash bodies with maple fingerboards combined to produce a notably brighter tone than that produced by Jazz basses from the 60s. American Standard Jazz Basses produced between 1989 and mid-1994 featured a larger body shape, a 'curved' neck plate set into a chambered pocket for greater sustain and a 22-fret neck, similar to that of a
Precision Bass Plus, with a standard vintage-style top-load bridge, two separate volumes and a master TBX tone circuit. Usually known as "Boner" Jazz Basses, these early American Standard models (designed by George Blanda, who was Fender's senior
R&D engineer during that period) were discontinued in 1994 and shouldn't be confused with the Fender Jazz Bass Plus, which has the same 22-fret neck design, but utilizes a different (downsized) body styling,
Lace Sensor pickups,
Schaller "Elite" fine-tuner bridge on the four-string model or Gotoh Hardware high-mass bridge on the 5-string model, and
Phil Kubicki-designed active electronics. Unlike the
Fender Precision Bass Plus, which had an optional maple neck, the Boner Jazz Bass was offered only with a rosewood fingerboard. The Jazz Plus Bass was available with an alder body and the option of a natural-finish ash body on the four-string model for a $100 upcharge, either a maple or rosewood fretboard on the four-string and pau ferro (an exotic hardwood whose tone is brighter than rosewood yet warmer than ebony) on the five-string. The Jazz Plus debuted in 1989 (the five-string model was released in 1990), but was discontinued in 1994 and replaced by the
USA Deluxe Series Jazz Bass the following year. A fourth push button control is available on American-made Jazz Basses produced between mid-2003 until 2008. Known as the "S-1 Switch", this feature allows the pickups to operate in standard,
parallel wiring, or alternatively in
series wiring when the switch is depressed. While in series, both pickups function as a single unit with one volume control, giving the Jazz Bass a sound more similar to the Precision Bass. The two pickups are built to be opposite from each other in both magnetic polarity and electrical phase, so that when heard together,
hum is cancelled—the
humbucking effect. In 2008, the American Series models were replaced by a new American Standard line, which greatly differs from the first-generation American Standard Series basses introduced in 1994. The 2008 American Standard Jazz Bass retained the "American Series" rolled-edge neck with highly detailed nut and fret work, as well as the familiar rounded body shape with the vintage body radius, but deleted the S-1 switching system and incorporated a new high-mass vintage bridge, Hipshot lightweight vintage-style tuning machines, a richer and deeper neck tint, gloss maple or rosewood fingerboard and satin back for smooth playability. It also has a thinner finish undercoat that lets the body breathe and improves resonance. In March 2012, Fender updated the American Standard Jazz Bass (except the five-string version) with Custom Shop 1960s Jazz Bass pickups. To celebrate the 50th anniversary of the Jazz Bass, first introduced in 1960, Fender released in 2010 the 50th Anniversary Limited Edition Jazz Bass. This bass sports a selected alder body, finished in a Candy Apple Red nitrocellulose lacquer, and incorporates design elements from several periods in the instrument's history, including 1960s-era lacquer finish, headstock logo, chrome bridge and pickup covers, 1970s-era thumb rest and bridge pickup positioning, modern-era high-mass bridge and Posiflex graphite neck support rods. ==Design features==