Yamaha Cornet (Short Shank) Model No. Inner Rim Diameter (mm) Rim Contour/ Thickness Cup Depth Throat (mm) Backbore Playing Characteristics 7D4d 16.24 semi-flat/ thick semi-deep 4.10 semi-wide Small inner rim diameter. Flat and wide for extended endurance. Bright, round tone. Outstanding high tones. 8D2 16.36 semi-round/ standard semi-deep 4.10 wide Small inner rim diameter with a relatively deep cup. Soft yet lyrical tone that is excellent for playing in the high range. 9E 16.44 standard/ standard deep 4.50 semi-wide Appealing "British-style" soft tone. Medium rim and deep cup for easy playability over a wide range. 11C4 16.46 semi-flat/ standard standard 3.65 semi-narrow Easy high register. Ideal for beginners. Same rim and cup configuration as the 11C4 trumpet model. 11E4 16.46 semi-flat/ standard deep 4.20 standard The standard British-style cornet mouthpiece. Exceptionally flexible for a wide range of styles. 13E4 16.70 semi-flat/ standard deep 4.50 standard Slightly larger inner rim diameter than the 11E4 for a richer, heavier tone. Deep "V" cup delivers traditional soft cornet tone. 14E 16.86 standard/ standard deep 3.98 standard Slightly smaller inner rim diameter than the 16E. Beautiful soft tone. Centered tone and outstanding stability over the instrument's full range. 16E 17.06 standard/ standard deep 3.98 standard Popular with top British players. Unique configuration with a fairly thin rim facilitates advanced playing techniques. David King Signature 4.60 standard/ standard deep 16.91 semi-narrow