Perantucci Sousaphone Mouthpiece SP-5
 
This mouthpiece is based on the PT-50+ with a large, deep cup for strong musicians
 
SP-5 -Sousapower 5 - Big and Bold
Cup Diameter - 33 mm
Cup - Rounded Pear Shaped
Rim - 8 mm Flat Rim with sharp inner edge
Throat Bore - 8.3 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.