The YOB-841 features an open-bore configuration optimized to match American-style reeds. This inner bore shape is complemented by tapered tone-holes with subtle conical undercutting for a dark silky tone with a focused center.
Variable wall thickness bell for full, rich sound. MB2 mouthpipe provides quick response and excellent intonation. French bell bead rim with low dome wire improves overall projection due to the refined, sharper bell rim edge. Skeletonized valve stem allow for increased flexibility in instrument response and timbre. Narrow brace set is reminiscent of designs from the 1930s, 40s and 50s, helping give the instrument a quicker response and transmit vibrations efficiently. High water key chimney improves resistance characteristics and overall tone.
This euphonium looks as good as it plays. By adding gold accents to the valves and slides, Yamaha has created an instrument that is just beautiful. Add to this the developmental aspect with many of the world's finest soloists contriubuting and you have a sound to match the view.