User Manual

8
Yamaha Mouthpieces
Essential Mouthpiece Parameters
Backbore
Narrow
Wide
Model Number System
14 A 4 a
Backbore
Inner rim diameter
Cup volume + shape
Rim contour
Inner rim diameter = 5–68 (narrow–broad)
Cup volume + shape = A–E (shallow–deep) C= standard
Rim contour = 1–5 (round–flat) 3= standard
Backbore = a–e (narrow–broad) c= standard
Backbore
The “backbore” is the inner section of the
mouthpiece bore which follows the throat.
The backbore has a complex flare which can
significantly affect high-register pitch. The
diameter of the backbore also influences timbre
and resistance. Like most other diameter-related
parameters, a narrow backbore results in increased
resistance, brighter tone, and easier playing in
the high register. A larger backbore decreases
resistance for darker tone and easier playing in the
lower range.
Shank
This parameter is of prime importance in
determining how well a mouthpiece matches your
instrument. The taper of the mouthpiece shank
must perfectly match the instrument’s receiver —
there should be absolutely no “play”. The outer
diameter of the shank determines how deeply the
mouthpiece seats in the receiver, thus affecting
overall pitch, the accuracy of individual notes, and
even playing feel.
Brass