Jo-Ral TRB-4C Copper Bottom Bass Trombone Straight Mute
TRB-4C Copper Bottom Bass Trombone Straight Mute. Aluminum/copper Jo-Ral mutes have a vibrant, exciting tonal quality and excellent intonation. They are made of spun aluminum, and are famous for their sound and for their consistency across all registers. This model features a copper bottom, which produces a warm, dark sound.
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