Yamaha RBX A2
The RBX4 A2 defies the conventional wisdom that the more uniform and heavy the material, the better the sound. Yamaha has challenged this concept with an advanced technology called Alternative Internal Resonance, or AIR. AIR combines lightweight and resonant softwoods between harder tonewoods creating an instrument loaded with sustain and tone while maintaining an ultra lightweight construction. Already proven in the RGX line, Yamaha now offers this sustain and tone in the RBX line with the RBX4 A2 bass guitar.