Remo Smooth White Emperor heads offer great projection with a lower darker tone and more durability than Smooth White Ambassadors thanks to their heavier two-ply 14-mil construction. They re very popular in marching band drum corps and indoor drumline settings. The Crimplock profiled hoop design provides better tuning capability at higher tensions. The outer edge of the hoop is profiled over the glue channel creating rigidity and higher strength.