Yamaha custom Alto tromboneIn creating the new YSL 871 and 872 alto trombones, Yamaha has effectively combined its advanced wind instrument technology, nurtured in the making of the Xeno series, with traditional craftsmanship in a basic design. This instrument features a brilliant, rich sound and superior intonation. It gives artists amazing expressive freedom for optimum performance in all genres and styles an essential quality for today? s wide ranging musical scene and is