Malletech MJB Black Marimba, 5 octaves, standard-width Honduran rosewood bars, coupled with massive, 4" slow-bent tunable resonators, provides the low-end power players crave without sacrificing wide reaches, belt-driven height adjustment, nuts-and-bolts resonator assembly, the rubber unibrackets create a near-silent frame, which means all that you ll hear is the beautiful music you create, the six-part resonators and easy-to-assemble frames make set-up by one person a breeze