Jupiter JEP705 700 Series Euphonium - Key Of BbThe Jupiter JEP705 3 Valve Euphonium offers warm, rich tone and rugged durability, while also benefitting students by being lighter and more balanced. It features a . 570" bore with an 11" yellow brass upright bell. Features One piece bracing and valve section design optimizes responsiveness and resonance. Unique annealing process enhances the timbre of Jupiter euphoniums to achieve tonal purity and warmth. The improved playing experience allows