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Moon JB-4 Jazz Bass Blonde White Nitro Lacquer, Japan


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Up for sale, a Moon JB-4 in exceptional, 100% original condition and in perfect working order, complete with the original gigbag. A boutique Japanese bass brand manufactured by PGM (Professional Guitar Manufacturer) and rarely seen outside of its country of origin, the JB-4 is an expertly crafted instrument featuring an alder body, maple neck capped by a thick slab pau ferro fretboard, nitro lacquer Blonde White finish, and Moon Custom Shop hand-wound MJB-504 single coils.

An expressive, detailed-sounding bass, this JB-4 is fairly unique among the Moon product line, which tends to gravitate towards active electronics. These hand-wound passive pickups are decidedly traditional in their wind, offering a sweet, present upper midrange, punchy and clear bass register, and a smooth growl in the top end, accentuated by 45-100 roundwound strings. Weighing 9lbs 14oz, this JB-4 has been professionally setup here at Mike & Mike’s Guitar Bar with easy-playing action and spot-on intonation.

The maple neck has a medium U-shaped profile carve with lightly rolled fretboard edges and full shoulders, particularly well-rounded in the upper registers, measuring .840” deep at the 1st fret and .970” at the 12th. The thick slab pau ferro fretboard has a 12” radius, and the medium jumbo fretwire is pristine. This bass plays cleanly up the 34” scale with a straight neck and a responsive, optimally-adjusted truss rod, and the bone nut measures 1 1/2“ in width. The headstock sports both Moon and PGM logos, and the back of the headstock retains the small “Custom Built by PGM” transparent sticker. The Moon-branded nickel-plated tuning machines have large baseplates, long stems, and clover buttons.

All of the electronics function as intended, with the MJB-504 pickups governed by a pair of Volume knobs and a Master Tone control. The chrome-plated hardware is positively gleaming, including the control plate, dome-topped knurled knobs, bridge base, and steel barrel saddles. The pickup covers have small “Moon” silkscreen logos, and the four-ply tortoise pickguard retains the factory protective film.

The nitro lacquer Blonde White (opaque and akin to Olympic White) finish exhibits just a scant few tiny dings on the body as a whole, largely relegated to the lower bout perimeter, as well as a touch of buckle worming on the back. The smooth ambered gloss on the neck profile is immaculate.

The original faux leather gigbag is included.