Detail 01
24 throat
Wider than the 27 throat on the M3C version. Blows more openly and takes noticeably more air to fill.

Independent shopping perspective
Open-blowing symphonic trumpet mouthpiece, number 3 rim diameter with a 24 throat and large Schmidt backbore. Gold plated. For orchestral and section players wanting volume and breadth.

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
Wider than the 27 throat on the M3C version. Blows more openly and takes noticeably more air to fill.
Detail 02
Less resistance behind the cup. The sound spreads and keeps growing at volume instead of compressing.
Detail 03
The bore opens into the backbore sooner, so the tone blooms earlier as you push air.
Detail 04
Mid-size in the Symphony M range. Rim diameter sets how much lip sits in the cup, driving endurance and low-register ease.
Detail 05
Slicker on the lip than silver, which helps some players move on the rim. Softer surface, so handle it carefully.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
The M3C has a tighter 27 throat and Schilke's C backbore, so it feels more resistant and compact. The M3 is the open version — 24 throat, larger Schmidt backbore.
Dimensions are identical, so it comes down to feel. Gold is slicker and softer against the lip; silver is grippier and firmer. Pick by how it sits, not by sound.
It is not built for that. The open backbore and symphonic cup favor volume and a wide sound rather than the upper-register focus a shallow lead piece gives you.
Both use a 24 throat. The M3D has a slightly smaller number 3 rim, a standard bowl C cup, and a tighter Schmidt backbore, so it feels more compact and resistant.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.