Jamerson started on a school-owned upright bass. After graduating from high school, he bought a German
upright bass which he later used on such Motown hits as "
My Guy" by
Mary Wells and "
Heat Wave" by
Martha and the Vandellas. This instrument is in the Rock and Roll Hall of Fame. In 1960 to 1961 he transitioned to electric bass. Jamerson played mainly the
Fender Precision Bass, but is known to have briefly used a
Fender Bass V and a
Hagström eight-string later in his career. He continued to use the upright bass occasionally, as in 1964's "My Guy". His first electric bass was a refinished 1957 Precision, nicknamed "Black Beauty". The bass was previously owned by his fellow bass player Horace "Chili" Ruth. The instrument was soon stolen, leading him to replace it with an early sixties sunburst Precision, although this was stolen too. He then acquired a stock 1962 Fender Precision Bass, which would become his primary instrument for most of his career. It was nicknamed "The Funk Machine" by his fellow musicians. It had a three-tone sunburst finish, a tortoiseshell pickguard, rosewood fretboard and chrome pickup and bridge covers (the latter containing a piece of foam used to dampen sustain and some overtones). On the heel of the instrument, he carved the word "FUNK" in blue ink. He typically set its volume and tone knobs on full. This instrument was also stolen, just days before Jamerson's death in 1983, and never recovered. Jamerson used La Bella heavy-gauge (.052–.110) flatwound
strings which were never replaced, unless a string broke. He did not particularly take care of the instrument, as he stated: "The dirt keeps the funk". The neck may have eventually warped, as many claimed it was impossible to play. While this made it more difficult to fret, Jamerson believed it improved the quality of the tone. In the mid-1970s, a producer attempted to modernize Jamerson's sound by asking the bassist to switch to brighter-sounding roundwound bass strings, but Jamerson politely declined. One aspect of Jamerson's upright playing that carried over to the electric bass guitar was the fact that he generally used only his right index finger to pluck the strings while resting his third and fourth fingers on the chrome pickup cover. Jamerson's index finger even earned its own nickname: "The Hook". Another aspect of Jamerson's upright playing that carried over was his use of open strings, a technique long used by jazz bass players, to pivot around the fretboard which served to give his lines a fluid feeling. He played with a relaxed and light touch. Jamerson's
amplifier of choice at club performances was an
Ampeg B-15; in larger venues, he used a blue
Kustom with twin 15-inch speakers. On both, the bass knob was typically turned up full and the treble turned halfway up. On most of his studio recordings, his bass was plugged directly into the custom-made
mixing console together with the guitars from
Eddie Willis,
Robert White and
Joe Messina. He adjusted the console so that his sound was slightly overdriven and had a mild tube compression. In 2017, it was reported that Jamerson gave a 1961 Fender Precision bass to bassist Billy Hayes in 1967 or 1968. This instrument is in the
Musicians Hall of Fame. In 1977, Jamerson was photographed with a 1965–1968 Precision bass (a line of instruments which had a transition logo). There is speculation that in mid to late-1960s Jamerson's then-primary instrument was parted with, and that he acquired and replaced it with a 1966 model. ==Notes==