Detail 01
1.015" cup diameter
Toward the large end of the range. More lip vibrates, giving a broader sound but costing endurance up high.

Independent shopping perspective
Gold-plated small-shank trombone mouthpiece with a 1.015" rim and deep D cup. For symphonic tenor players and euphonium players wanting more diameter.


Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Toward the large end of the range. More lip vibrates, giving a broader sound but costing endurance up high.
Detail 02
Extra cup volume darkens and fills out the tone, especially in the low and middle register.
Detail 03
The most open throat on Schilke's trombone list. Freer blow and more volume ceiling, but it takes steady air to control.
Detail 04
Fits small and medium bore tenor leadpipes. Unusual pairing — most symphonic-size cups ship on large-shank taper.
Detail 05
Softer, grippier feel on the lip than silver, and an alternative for players who react to silver plate.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
The 52D is wider at the rim — 1.015" against 1.005" — and has a 1/4 inch throat where the 51D uses a J. Same deep-cup concept, more diameter and more air.
Yes, that's one of its intended uses — specifically for euphonium players who want a larger rim diameter than the 51D offers. Check your receiver takes a small-shank taper.
The deep D cup and open throat favor the low and middle register, adding fullness and volume there. The trade-off shows up above the staff, where the large cup is harder to sustain.
Likely, yes. A large diameter with a deep cup and open throat needs developed air support. The 45 or 47 are the sizes Schilke points beginners and general players toward.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.