"Deluxe" Jazz Bass models feature an active pre-amp (usually with three bands of equalization) in place of a single passive tone control; these basses have three separate equalizer controls: bass and treble responses are controlled by the base and top of a stacked double pot, while midrange is controlled by a second knob. They came with 22 frets, abalone dot position inlays and an 18-volt power supply on some models. Known as the Jazz Bass Deluxe since being introduced as part of a major reworking of Fender's Electric Bass lineup in 1995, they have been renamed the American Deluxe Jazz Bass. The American Deluxe Jazz Bass (available in four-string fretted and fretless, five-string fretted and left-hand versions) featured two samarium-cobalt Noiseless Jazz Bass pickups, designed by Bill Lawrence. Fender used downsized bodies to accommodate the 22-fret neck and reshaped the pickguard with nine screw holes. American Deluxes produced between 1995 and 1999 were initially available with "single-pole" pickups designed by John Suhr. These were soon changed to the Bill Turner-designed dual-coil Ceramic Noiseless units with nickel-plated (gold-plated on certain models) polepieces until the advent of the Bill Lawrence-designed Samarium Cobalt series in 2004. Other refinements include a strings-through-body/top-load bridge, Posiflex graphite neck support rods, rolled fingerboard edges, highly detailed nut- and fretwork. Five-string versions are presented with a 4+1 tuner arrangement and two Hipshot string trees since 2002. The asymmetrical five-bolt neck plate, along with the smooth contoured heel allow much easier access to the upper registers. Bound fingerboards with pearloid block inlays were added with the introduction of the American Deluxe Jazz Bass FMT & QMT in late 2001, featuring flamed or quilted maple tops and gold-plated hardware. Fender discontinued these models in 2007. In 2010 the American Deluxe Jazz Bass was updated with a pair of N3 stacked-coil Noiseless Jazz Bass pickups, an active/passive toggle switch, CBS styling and a 21-fret bound compound radius maple neck featuring rosewood or maple fingerboards with rectangular block inlays. Other features include Hipshot vintage lightweight tuners, "Strong Arm" string retainer bar for the A and low B strings, and Fender's High Mass Vintage (HMV) bridge. The American Deluxe series was discontinued in 2016. The American Elite Jazz Bass, introduced in 2016, sports a compound modern C-to-D neck shape, fourth-generation noiseless pickups, a "spoke-wheel" truss rod system for easier neck relief adjustments and a new asymmetrical neck heel. It is offered with a