Perantucci Sousaphone Mouthpiece SP-4
 
This mouthpiece is based on the PT-84. A rather small cup mouthpiece, ideal for beginners.
 
SP-4 -Sousapower 4 - Versatile
Cup Diameter - 32 mm
Cup - Medium Depth Rounded
Rim - 8 mm Slightly Rounded Edge
Throat Bore - 8.4 mm
Shank - Small (American)
Finish - Silver Plated
 
A unique balance between cup shape, throat and back bore dimensions assures excellent intonation. Sound Energy generated by the player is enhanced by these new mouthpieces. A firm embouchure interacts with and compliments the acoustical impedance generated in the instrument.
 
The results are superior: high output results in efficiency and therefore ease of performance.  Works well with BBb and CC Tubas.