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The Studio Master Series offers a wide range off options all designed to find the optimum balance of resistance between the player and his equipment to achieve maximum air velocity in the upper register. There are Five Major Elements that we manipulate in order to achieve this balance. Overall length, cup depth and shape, bore and back bore.Overall LengthThe overall length of the mouthpiece affects the resistance. All things being equal, the longer the overall length, the greater the resistance. The XMS models have an overall Length of 3.310″ (84.07mm).Cup Depth and ShapeThe Studio Master cups are shaped quite differently than most shallow cupped mouthpieces. They employ a “Dual Cup” concept. This allows us to carefully and purposefully manipulate the two most important factors relating to shallow cupped mouthpieces: Lip accommodation and Airflow. The top cup is designed to allow for more room for the lips to vibrate freely. The bottom part of the cup (throat area) is used to regulate the airflow. The XMS cup is decidedly deeper and has more of a “V” shape. It is a balance of ample “bowl” in the top of the cup with a gradual “V” shape into the throat area.The top part of the cup has a great deal more room just under the rim in the walls of the cup. Not only does this allow for the lips to vibrate more freely, but it is an important factor in the robust sound that the Studio Master pieces are known for. This extra room also lets players with fleshier lips play a shallower cup than they generally are able to play. The extra room in the throat area of the cup (bottom of the cup, or entrance to the bore) allows more air to flow through more quickly.Bore and Back BoreThe XMS models have a medium large back bore. This extra bit of resistance can help to quicken response and facilitate range. They have a #27 bore size of .144″ (3.65mm). :