The Silent Brass System consists of the ST9 module and pickup practice mute.

The new improved ST9 Personal Studio has been reduced in size and weight to approximately 1/4th that of the earlier version. It has a tiny amplifier which offers a choice of clean or reverb enhanced sound. Its lets you hear your playing at a volume you are accostomed to while others hear only the practice mute. The Aux-In is a direct line in for playing along with CD's or other recordings.