Yamaha YEP-842TS Professional EuphoniumA main tuning slide trigger system has been added to Yamahas flagship YEP 842S euphonium offering enhanced, precise pitch control. The new trigger system has been tested for extreme durability to withstand the toughest action. Also, the additional weight of the trigger system helps to achieve a greater depth of tone and clarity of articulation. Main Tuning Slide Trigger System A main tuning slide trigger system offers precise pitch control as well as