A brass instrument mouthpiece is much more than an add-on or accessory. It is a vital part of your instrument. As interface between artist and instrument, it can mean the difference between mediocrity and mastery.

Standard Series (Small Shank, Large Shank)

Produced using the most advanced computer design and manufacturing technology, the Yamaha Standard Series mouthpieces feature unmatched precision, smooth attack, secure control, and easy playability. They have the ideal weight for all-around usage and are available in over 100 configurations.
There’s a Yamaha mouthpiece to suit every player.

Model Number System.

Standard Series (Small Shank)

Model No.	Rim Inner Diameter (mm)	Throat (mm)	Characteristics
SL-45AS	24.26	5.85	Small inner rim diameter with an extremely shallow cup for brilliant tone. Easy high notes. Ideal for bass trumpet.
SL-45C2S	24.26	5.85	Small inner rim diameter with a clean bite. Easy playability with a bright tone. Popular with studio players.
SL-46BS	24.58	5.85	Shallower cup than the 46C2. Outstanding high register. Fairly sharp shoulder. Brilliant tone.
SL-46C2S	24.59	5.85	Relatively large inner rim diameter. A good choice for advanced jazz players. Ideal for demanding professional studio applications.
SL-47S	24.98	5.85	Outstanding endurance. Rich tone suitable for ensembles and orchestras.
SL-48AS	25.25	5.32	The 48 rim combined with a very shallow cup. For alto trombones. Bright tone with good volume. Ideal for baroque compositions.
SL-48DS	25.25	6.62	Same rim as the 48 with a relatively deep cup. Rich lower register with a rich, soft tone. Also ideal for euphonium.
SL-48S	25.25	6.62	Well-balanced rim and cup for all-around playing. Refined design meets the needs of professional players.
SL-51BS	25.23	6.92	The 51 rim with a relatively shallow cup. Powerful sound. Popular with ensemble and orchestra euphonium players.
SL-51S	25.23	6.92	Relatively large inner rim diameter with large cup volume for a dark sound. Standard euphonium model with a beautiful rich tone.
SL-51C4S	25.23	6.92	Shallower cup than the 51. Plenty of volume and power. Solid tone throughout the instrument's range. Ideal for symphony orchestra playing.
EP-51DS	25.24	7.11	An even deeper cup than the 51 for a heavy, rich tone. Specifically for euphonium. Ideal for advanced players who prefer a dark sound.
SL-52S	25.65	7.11	Larger inner rim diameter and cup than the 51. Heavy tone. For advanced players.

• *The last “S” : Small Shank

Size Comparison Chart

Yamaha Model No.	Approximate Size Equivalent
45A	Bach 12E
45C2-12C	Bach 12C
46B	Bach 11C rim, shallower cup
46C2	Bach 11C
47	Bach 6-3/4C, Schilke 47
48A	Bach 6-1/2 rim, shallower cup
48	Bach 6-1/2AL, Denis Wick 6BS
48D	Bach 6-1/2AL rim, deeper cup
51B	Bach 5G, shallower cup, Schilke 51B
51	Bach 5G
51C4	Bach 5G, slightly shallower cup
51D	Bach 5G, deeper cup
52	Between Bach 5G & 3G

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