Jo-Ral Mutes Jo-Ral Mutes

TRB-4C Copper Bottom Bass Trombone Straight Mute

The ideal choice for any musical genre, the Jo-Ral Copper Bottom Bass Trombone Straight Mute produces a smooth, distinct tone It is free-blowing in all registers and designed to fit all tenor trombone bells. Finished with a copper bottom, producing a powerfully dark and rich sound.

The Jo-Ral TRB-4C Bass Trombone Straight Mute made of spun aluminum, and has been tested to perform evenly in all registers. Jo-Ral mutes also feature neoprene-enhanced composite cork pads that provide extra durability. The result is a more pliable cork that grips well and doesn’t dry out, become brittle or break off—so it lasts longer while easily accommodating fine adjustments for a perfect fit.


  • Fits bass trombones
  • Crafted from lightweight spun aluminum and copper
  • Smooth, distinctive tone
  • Pliable neoprene-enhanced composite cork pads offer lasting durability and grip
  • Soft felt cap for extra protection
  • Made in the USA

Available at these select retailers

Available at these select retailers