User Manual
23
Yamaha Mouthpieces
GP & Silver 925 SeriesBrass
Model
No.
Rim
Cup
Depth
Throat
(mm)
Backbore Playing Characteristics
Inner
Diameter
(mm)
Contour
Thickness
30-GP
30-ST
17.0 8 Standard Standard
Standard
(double
cup)
4.40
Semi-
narrow
Smaller inner rim diameter than the 31.
All-around type. Shallow “U” cup facilitates high
notes, while a deep “V” makes low notes easy.
31-GP
31-ST
17. 28 Standard Standard
Standard
(double
cup)
4.40
Semi-
narrow
Medium rim configuration provides flexibility for
difficult passages. Relatively large throat delivers
a heavy, somewhat dark tone with extra volume.
32-GP
32-ST
17.4 8 Standard Standard
Standard
(double
cup)
4.40
Semi-
narrow
Larger inner rim diameter than the 31.
Authoritative low notes. Large cup volume for
a rich, mellow tone.
Model
No.
Rim
Cup
Depth
Throat
(mm)
Backbore Playing Characteristics
Inner
Diameter
(mm)
Contour
Thickness
45C2-GP
24.26
Semi-
round
Standard Standard 5.85
Semi-
narrow
Small inner rim diameter with a clean bite.
Easy playability with a bright tone. Popular
with studio players.
48-GP 25.25 Standard Standard Standard 6.62 Semi-wide
Well-balanced rim and cup for all-around
playing. Refined design meets the needs of
professional players.
Model
No.
Rim
Cup
Depth
Throat
(mm)
Backbore Playing Characteristics
Inner
Diameter
(mm)
Contour
Thickness
48-GP 25.25 Standard Standard Standard 6.62
Semi-
narrow
Well-balanced rim and cup with a fairly narrow
backbore. Meets the needs of professional players.
Model
No.
Rim
Cup
Depth
Throat
(mm)
Backbore Playing Characteristics
Inner
Diameter
(mm)
Contour
Thickness
59-GP 27.22 Standard Standard Standard 7.25 Semi-wide
Relatively thin rim. Rich sound even on pedal
tones. Voluminous cup for solid lows and
plenty of power.
Trombone Mouthpieces (Small Shank)
Trombone Mouthpiece (Large Shank)
Bass Trombone Mouthpiece
French Horn Mouthpieces
Model
No.
Rim
Cup
Depth
Throat
(mm)
Backbore Playing Characteristics
Inner
Diameter
(mm)
Contour
Thickness
14F4-GP
16.76 Semi-flat Standard Standard 4.30 Standard
Relatively large inner rim diameter ideally
matched to an original “V” cup. A good choice
for demanding professional studio applications.
Flugelhorn Mouthpiece