Introducing Reference One - The Reference Legacy Unleashed.By leveraging specific woods, shell thicknesses, and bearing edges exactly where they are most sonically beneficial within a drum set, Pearls Reference Series originated the modern hybrid drum concept. Building upon this recipe and adding revolutionary enhancements in mounting and shell hardware, Pearl takes the hybrid drum concept to new, unprecedented heights. Every element of each drum in the Reference One drum sets construction is fine-tuned to deliver optimal performance, from th