The 6-string bass guitar extends both the low and high range by adding a low B and high C string, catering to advanced players in fusion, progressive rock, and solo bass performance. Pioneered by players like Anthony Jackson, it offers a broader harmonic range and chordal possibilities. Leading models include the Ibanez BTB846, Yamaha TRB6, Ken Smith BSR6, and Dingwall Combustion 6. While demanding greater technical skill, 6-string basses are favored by musicians who push the boundaries of traditional bass playing, incorporating melodic and percussive elements.