Part of Yamaha's L Series, the LL16RD features all-solid rosewood back and sides with a hand-selected premium Engelmann Spruce top A newly designed bracing pattern and A R E treatment create rich warmth and open resonance while maintaining excellent tone balance In addition, a new comfortable neck profile and Yamaha's Zero impact pickup ensure you a stress-free performance on stage A (Acoustic Resonance Enhancement) A is an original wood