The JP614 is a bass trombone mouthpiece designed for players seeking an extra-large and deep cup to produce a big and resonant bass trombone sound. It is part of the John Packer '600' series, which is crafted with attention to detail and offers great value for students and entry-level players. The mouthpiece is designed to be free-blowing, allowing players to produce a bright and attractive sound.

If you have any specific questions about the JP614 or if there's anything else you'd like to know, feel free to ask!