With the Crossover; have expanded the Marine Band series; introduce; new top-of-the-line professional quality instrument for the discerning player; modern blues rock jazz soul; funk. The Marine Band Crossover Harmonica s revolutionary laminated-bamboo comb; completely sealed making; water repellent and exceptionally stable; combination with the screw-together assembly the Marine Band Crossover; extremely airtight with fast even response and; raspy powerful sound that s exceptionally well-suited; amplified playing; well; acoustic styles.