The SR 640 has a basswood body with a 34-inch, three-piece maple neck with rosewood fretboard. You also get pearl dot fret markers, 24 medium-sized frets, a die-cast bridge and all-black hardware. The SR 640 uses an Ibanez IBZ DXP passive pickup at the neck and the IBZ DXJ passive at the bridge. This bass rocks with the EQBII 2-band active equalizer/pre-amp.