The GP Series has been created especially for professionals who require superior quality from their mouthpiece. The GP Series features an innovative shape and extra-heavy gold-plate finish for players who prefer a focused, concentrated tonal core.

Model Number System

GP Series Model No. Rim Inner Diameter (mm) Throat
(mm) Characteristics TR-11B4-GP 16.46 3.65 A somewhat shallow cup and medium rim for extra endurance. Brilliant tone. Suitable for D, Eb, and piccolo trumpets. TR-14A4a-GP 16.68 3.65 Fast-response high range and powerful sound. Ideal for piccolo or lead trumpet. TR-14B4-GP 16.85 3.65 Relatively large rim diameter and shallow cup. Outstanding overall balance for all musical genres. TR-14C4-GP 16.88 3.65 Rim designed for outstanding facility and flexibility. Popular in ensembles and orchestras. Can produce high volume. TR-16C4-GP 17.00 3.65 Large rim and medium cup for easy playability over a wide range. High volume. Excellent for symphony orchestra players. TR-17C4-GP 17.30 3.65 Powerful, dark sound. A popular choice with symphony orchestra players.