Aluminum/copper bubble model. The acoustic design of Jo-Ral mutes creates an exciting tonal quality that results in near-perfect intonation. The 2C Bubble Mute for the trumpet is made of spun aluminum, and has 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 for your favorite brass instrument.
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