The responsiveness of the YEP-321S assists beginning players in learning the phrasing of the euphonium. \n \nThe YEP-321S is an excellent choice for pro doublers or serious amateurs. The 321 features a strong warm tone, and is easy to play, with accurate intonation. \n \nHoned valves \n \nThe precise fit between valve casings and pistons after honing means no air leakage. \n \nPressure formed tubing \n \nPerfectly rounded tubing results in less turbulence and a smoother air flow, thus allowing for an excellent scale and reduced resistance. \n \nLaser-fused pluzuma welded bell \n \nA high-energy laser fuses the brass together for a virtually seamless bell, which allows continuous even vibrations. \n \nIntonation \n \nThe excellent intonation of the YEP-321 helps to foster a feel for correct pitch in beginning players. \n \nResponse \n \nThe responsiveness of the YEP-321 assists beginning players in learning the phrasing of the euphonium.