At Summer NAMM 2017, Yamaha introduced its new LJ16BC Billy Corgan Signature Model Jumbo, one of the company’s new LJ acoustic guitars. It was designed in collaboration with the former Smashing Pumpkins frontman and features a solid Engelmann spruce top treated with A.R.E. (Acoustic Resonance Enhancement), which helps give the instrument a tonal richness commonly found in vintage or well-played guitars. The back and sides of these models are produced with rosewood, and feature solid wood for the LJ16R and laminate for the LJ6R.