Detail 01
24 throat
The larger Schilke bore. More air moves through, so the sound opens up and high notes take more support.

Independent shopping perspective
Schilke Symphony M Series trumpet mouthpiece, gold-plated, M150 rim with a 24 throat. For players wanting a large-backbore, open-feeling setup.

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 larger Schilke bore. More air moves through, so the sound opens up and high notes take more support.
Detail 02
Tighter bore with the Schilke C backbore. Adds resistance and a more compact, controllable feel.
Detail 03
This is what creates the open feel. Less pushback from the mouthpiece, more reliance on your own air.
Detail 04
Sits between the numbered Schilke rims. A middle-ground contact patch — neither the widest nor the smallest option in the series.
Detail 05
Slightly smaller rim, standard bowl C cup and a tighter Schmidt backbore — the more resistant version of the same rim family.
Detail 06
M2 rim, throat and backbore with the M1's deeper cup. More cup volume without changing what your lips feel.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
All share the 150 rim diameter. The M150 has a large Schmidt backbore with a 24 throat for an open feel. The M150C uses a 27 throat and C backbore. The M150D uses a 24 throat with a tighter Schmidt backbore.
It gives less resistance and a more open feel, which puts the work on your air support. Players who want help up top usually prefer the tighter 27-throat C models.
The M1D is the model called out for both Bb and Eb playing, thanks to its 24 throat and tighter Schmidt backbore. The open M150 is aimed at Bb and C work.
Feel, not sound. Gold is smoother and warmer on the lips than silver and does not tarnish. Rim plating wears through with heavy playing.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.