The Yamaha 14B4 mouthpiece series is a precise easy playing and reliable way to compliment your trumpets sound. The 14B4 mouthpiece features a medium-large sized rim diameter combined with a semi-shallow cup depth. This offers tonal flexibility over a wide range resulting in clarity and power across all ranges. The 14B4 also brings out the lower registers meaning the trumpet can benefit from a wider array of tones. The Yamaha 14B4 is a common choice for orchestras and ensembles due to its practical features.