LX Cups
The LX Cup has a very large cup volume, increased depth, an alpha angle much lower than the L Cup, and a #3 Backbore. This allows for a lot of lip engagement into the mouthpiece.
A strong embouchure is required to control this mouthpiece and maintain endurance, but the pay off is a huge sound, a full spectrum of overtones, and an evenness and brilliance throughout the horn unmatched with "conventional" mouthpieces of a similar volume.
Projection is excellent.
Works well on the C and Bb trumpet.
An outstanding orchestral and solo mouthpiece, used by top orchestral players.