The Research and Development Department ofSTOMVIhas conducted a study on the acoustic effect of the valve bottom caps of the trumpet and has incorporated a soundbox inside the cap.
The effect is based on the intrinsic characteristics of the sound box in instruments such as the guitar or the piano, by creating harmonic oscillation through a vibration which improves the performance of the instrument.
STOMVIinvites you to test the advantage of this system over traditional caps. You can call the telephone number where you will be extensively informed.
This system is patented bySTOMVIand is applicable to some trumpet brands (ask for information).