- The YOB-841 features an 'open' bore configuration optimized to match 'American' style reeds.
- On the YOB-841L the upper joint body is drilled out slightly larger, where a thin ebonite pipe with an oboe bore is adhered. Ebonite is an excellent material for wind instruments, as is proven with top-grade mouthpieces for saxophones and clarinets as well as bassoon liners.
- The inner bore shape is complemented by tapered tone-holes with conical undercutting for a dark silky tone with a focused center.
- This model was developed in close cooperation with the principal oboists of some of America's top orchestras.
- The Philadelphia D key has an extra screw that permits fine adjustments to the high D for improved tone and tuning.
- Third octave key and king-rosewood body are available on request.