Sordina recta de trombón bajo Jo-Ral TRB-4B con fondo de latón

The Jo-Ral 4B Bass Trombone Mute was designed for an exciting tonal quality that results in near-perfect intonation. They are made of spun aluminum and have been tested to perform evenly in all registers. Many models are also available with brass bottoms-offering a slightly warmer moderately dark sound or with copper bottoms which produce an even warmer darker rich sound.