Yamaha CT-9015 15'' Concert Tom *DEMO*This double headed model is a perfect choice for a classical concert use. Proportional sizing, oak shell and YESS III Mount System give this instrument a unity in tone and abundant sustain, resulting in extraordinary range of expressivity. Features Size 15" x 11 1 2" New Size Structure After exhaustive study to determine the best size for this model specifically designed for concert use, Yamaha adopted a size structure based on the proportional