After playing for few years with a JK USA 1 1/2C, this trumpet mouthpiece seems to my lips a little too large.
Trying to improve endurance, I decided to change but had an hesitation between a JK USA 2C model or a 2 1/2c ? These two models are close but differents at the same time.
We may say the 2 1/2C cup has more volume in the lower part of the cup while the 2C cup is slightly more V-shaped. I have chosen the 2C witch fits me very well. Like others JK USA models, of highest quality, this mouthpiece is an engineering masterpiece . The rims are very comfortable, the sound is rich, clear, warm and really beautiful.