Yamaha RBX4-A2, finished in Black, delivers the next revolution in evolution. Yamaha RBX4-A2 Black basses fly in the face of conventional wisdom, which has long assumed that the more uniform and heavy the material, the better the sound. RBX4A2 has shattered this concept with an advanced technology called Alternative Internal Resonance, or A.I.R. for short.
A.I.R. combines lightweight and resonant softwoods sandwiched between harder tonewoods creating an instrument loaded with sustain and tone while maintaining an ultra lightweight construction. Already proven in the RGX line this awesome sustain and tone is now available in the RBX line with the Yamaha RBX4 A2.