Ultralight construction and ultraheavy tone! The Alternative Internal Resonance body on the Yamaha RGX A2 is more than fancy words... this is the lightest most resonant design ever. Rear 3-position knob controls the selection between 2 Yamaha alnico soapbar humbuckers. Blue and green LEDs in the volume knob surround indicate pickup selection. Cool die-cast cylindrical tuner buttons provide low-gear precision tuning.