Detail 01
.674" cup diameter
The smallest in this group. Less lip inside the rim generally means easier upper register and better staying power over long sets.

Independent shopping perspective
Gold-plated Schilke 15 trumpet mouthpiece. A .674" medium-small cup that blows freely with a clear sound — a general-purpose piece, not a specialist one.

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
The smallest in this group. Less lip inside the rim generally means easier upper register and better staying power over long sets.
Detail 02
Shared by nearly every model in this series, so the throat isn't what separates them — rim size and cup shape are.
Detail 03
Little back-pressure against the air. Comfortable for long playing, but gives less feedback to push against than a resistant piece.
Detail 04
Narrower and rounder than the semi-flat 15C4. More flexible for slurs and bends, less cushion for endurance.
Detail 05
Deeper than the 15B at the same diameter, so it reads fuller and less brilliant across the range.
Detail 06
Slightly softer, grippier feel on the lip than silver, and an option if silver plate irritates your skin.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
That's what it's built for — a free-blowing, clear-sounding piece that isn't specialized toward lead or symphonic playing. It's the smallest diameter in this group, which favors endurance.
Same .674" rim diameter. The 15B has a shallower B cup, which produces a more brilliant sound. The plain 15 is fuller and less edgy.
Same diameter, different rim. The 15C4 uses a number 4 semi-flat rim for increased endurance. Choose it if long sets wear you out; choose the 15 for more flexibility.
You're paying for gold plating and Schilke's tolerances, not a different sound category. The dimensions do the work — if the size fits you, the piece will play the same in silver.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.