electric bass manufacturer. gr basses builds high quality 4 and 5 string basses with many features find information about gr basses.manufacturing basses in the u.s.a. standard features of all gr basses are: solid ash, alder or poplar body, available in many finishesbi-cut maple neck with ebony, rosewood or maple fingerboard,aluminum reinforced truss rod,baselines music man replacement pick-up,pearl, abalone or black inlays,chrome or black hardware