Detail 01
Brass bottom
Brass is denser than aluminum, adding weight and edge. The muted tone cuts harder through a loud section.
Product detailSKU #1274319726568
Jo-RalTRB-1B Brass Bottom Trombone Straight Mute
1/3
Independent shopping perspective
The Korena take
Straight mute for trombone with a brass bottom, giving a brighter, more cutting muted sound than an all-aluminum straight. For section and pit work.
Strong match
Who this is for
- Big band section players who need the mute to project
- Pit and theater books calling for straight mute
- Orchestral passages wanting a brighter muted color
Consider the trade-offs
When to look elsewhere
- Quiet practice — a straight mute is not a practice mute
- Bass trombone players; sizing is for tenor bells
- Players wanting a dark, blended straight-mute sound
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Straight mute shape
The standard cone that most charts mean when they just write 'mute'. Your default first mute.
Detail 03
Cork mounting
Three corks hold it in the bell. They compress with use, so fit loosens and needs occasional replacement.
Detail 04
Tenor trombone sizing
Matched to a tenor bell throat. On a bass trombone it will sit too shallow to seal.
Detail 05
Metal body
Brighter and more focused than fiber or cardboard mutes, which sound softer and blend more.
Final check
Know before you order
- 01Mute sharpens pitch — pull the tuning slide slightly when playing muted
- 02No bag or mute holder included
- 03Fit varies by bell; corks may need sanding for a snug seat
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is this the mute my part means when it says 'mute'?
Usually yes. Unqualified mute markings in trombone parts almost always mean straight mute. Cup, harmon, and plunger are named explicitly.
02Does the brass bottom actually change the sound?
Yes. Brass adds mass and brightness compared to all-aluminum, so the mute reads as more cutting and less blended in a section.
03Will it fit my bass trombone?
It's built for tenor bell sizing. A bass bell is wider, so the mute would sit too far in and seal poorly.
04Can I practice quietly with it?
No. A straight mute changes tone, not volume. You want a dedicated practice mute for that.
