Yamaha YAC-HR34C Horn Mouthpiece

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Yamaha YAC-HR34C Horn Mouthpiece

Produced using the most advanced computer design and manufacturing technology, our 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.



Rim Inner Diameter: mm
Throat: mm


Model No.Rim Inner Diameter (mm)Throat
HR28B 16.87 3.90 Ideal for Bb/HF horns. Smallest "V" cup in the line, but with a soft, mellow tone.
HR29B 17.07 3.90 Fairly thick rim with a relatively small inner diameter for superior high tone. Medium throat for easy all-around playing.
HR29C4 17.08 3.98 Ideal for Bb/HF horns. Relatively sharp shoulder and medium throat for clear tone.
HR29D4 16.88 4.50 Double-cup combining medium and extra-deep "V" cups. Fairly small inner diameter, but with a large throat for rich tone.
HR30B 17.27 3.90 Standard "V" cup model with a larger inner rim diameter than the 29B. Smooth airflow. Ideally matches horns with a very narrow bell.
HR30C4 17.28 3.98 Medium inner rim diameter and "U" cup for fast response. Standard type with ideal resistance and powerful, rich tone.
HR30D4 17.08 4.50 Exceptionally rich tone. Matches horns with a wide bell. Excellent stability on high notes.
HR31B 17.47 3.90 Medium inner rim diameter with a "V" cup for a "traditional" soft horn tone. High volume over a wide range. A good match for horns with a narrow bell.
HR31D4 17.28 4.50 Heavy tone and high volume. Relatively flat rim of medium thickness for easy playability.
HR32B 17.67 3.90 Large inner rim diameter for outstanding lownote tone. Largest "V" cup in the lineup. Rich, mellow tone.
HR32C4 17.48 3.98 Plenty of volume. Relatively flat rim of medium thickness for easy playability.
HR32D4 17.48 4.50 Largest double-cup in the lineup. Also ideal for Wagnerian tuba. Large cup volume for a dark, heavy sound and easy low notes.
HR33B 17.87 3.90 "V" cup with rich and mellow tone.
HR33C4 17.68 3.98 Large "U" cup. Can deliver a big, expansive sound. For advanced players.
HR34B 18.07 3.90 Largest "V" cup in the lineup. Happy sound and low notes. For advanced players.
HR34C4 17.88 3.98 Plenty of volume. "U" cup for powerful performance.
HR35C4 18.08 3.98 Largest "U" cup in the lineup. Can deliver a heavy sound. Suitable for large orchestras.


Comparison Chart

 Rim Inner Diameter
?ùÇ SmallLarge ?û?
Volume &
V Cup 28B 29B/SOMMERVILLE 30B 31B 32B  33B 34B BACON
U Cup   29C4 30C4   32C4  33C4 34C4 35C4
Double Cup   29D4 30D4 31D4 32D4      
    30 31 32      
V Cup: As a cup approaches the “V” shape the sound becomes darker and the lower register becomes easier to play.
U Cup: The more “U” shaped a cup is, the brighter the sound and the easier it is to play in the high register.
Double Cup: A “double cup” design, essentially a combination of the “U” and “V” shapes, facilitates playing throughout the instrument’s range.
  GP Series available
  Signature Series