Trumpet players are often called on to play the high notes, and often in places where any missed notes would be noticed by any and all. Therefore, proper control of the high range of the instrument is crucial to anyone who wishes to play. Parduba created a double-cup trumpet mouthpiece to assist players in reaching these high notes with a good sound.
Get used to the mouthpiece. A new mouthpiece will always require some time to adjust to: Your lips aren't used to the size of the mouthpiece, and it will produce different tones and volumes. The first few times you use it, your new mouthpiece may wear your lips out early, and even create that tingling sensation new players get after playing.
Control your air. Though the double-cup mouthpiece makes it easier to reach high notes, it also makes it easy to overblow the instrument and create a blasting sound. You should practice playing in both the high and low register on your own before playing in a group or solo setting. Otherwise you may unintentionally throw of the balance of the piece.
Choose the correct size. Just as with ordinary mouthpieces, double-cups come in different sizes relating to the shallowness of the cup and diameter of the mouthpiece. A shallower cup will help reach high notes, but will often do so at the expense of the low register. For a first chair, this may not be much of a sacrifice, but a third chair trumpet player should look for something well-rounded.
Practice to master your mouthpiece. Like with any new equipment for the trumpet, a double-cup mouthpiece requires patience and practice to control. The mouthpiece makes it easier to reach high notes, but it won't hit the notes for you. You must practice to achieve the range you're hoping for. If you're not comfortable hitting the higher notes all at once, start with something easier for you, like a high G, and slur your way up. This will help get your lips used to reaching the high notes on your new mouthpiece without wearing them down too much or risking a split lip.