Detail 01
Bass trombone sizing
Cut for the larger bass bell throat. A tenor straight mute in a bass bell sits too deep and seals badly.
Product detailSKU #1274319726527
Jo-RalTRB-4B Brass Bottom Bass Trombone Straight Mute
Independent shopping perspective
The Korena take
Straight mute built for bass trombone, with a brass bottom. For bass players who need a mute sized to the larger bell.
Strong match
Who this is for
- Bass trombone players covering written straight-mute parts
- Orchestral and big band sections needing a proper bass fit
- Replacing a tenor mute that never seated in a bass bell
Consider the trade-offs
When to look elsewhere
- Tenor trombone players — this is the bass size
- Quiet home practice; a practice mute does that job
- Players wanting the lightest mute in the bag
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
Brass bottom
Brass is denser than aluminum, so the mute weighs more and its bottom end responds differently than an all-light build.
Detail 03
Straight mute
This is the default mute written into orchestral and big band parts. It is the one you get asked for by name.
Detail 04
Cork-seated
The seal depends on your bell. Corks wear down over time and need shaving or replacing to stay secure.
Detail 05
Just under $100
Standard territory for a section-grade bass straight mute rather than a student accessory.
Final check
Know before you order
- 01Confirm your horn is a bass trombone; the tenor model is a separate part
- 02No bag or case included — the brass bottom dents if it knocks around loose
- 03Recheck tuning with the mute in; straight mutes shift pitch
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this work on a tenor trombone?
It is sized for bass trombone. On a tenor bell it will seat too deep and not seal properly.
02What does the brass bottom do?
Brass is heavier than lighter mute materials, which adds mass at the bottom and changes how the mute responds.
03Is this the mute for standard muted parts?
Yes. Straight mute is the default when a part just says muted, unless cup or harmon is specified.
04Does it include a bag?
No. Just the mute. Store it padded — dents in the body or the brass bottom affect fit and sound.
