Detail 01
Large shank
Fits large-bore tenor and bass trombone receivers only. A small-shank horn needs an adapter or a different mouthpiece entirely.
Product detailSKU #1274115059951
BachLarge Shank Trombone Mouthpiece 1-1/4G
Independent shopping perspective
The Korena take
A large-shank trombone mouthpiece with a wide rim and deep cup. For bass trombone and large-bore tenor players who need weight in the low register.
Strong match
Who this is for
- Bass trombone players who want fuller pedal notes and low F
- Large-bore tenor players covering bass parts in a section
- Anyone whose current piece thins out below the staff
Consider the trade-offs
When to look elsewhere
- Small-shank tenor trombones — the shank will not seat
- Lead players chasing an easy, bright upper register
- Beginners still building embouchure strength and air support
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
1-1/4 rim size
Wide rim diameter. More lip vibrating inside the cup, which builds volume down low but gives less support up high.
Detail 03
G cup
The deepest standard Bach cup. Adds low-end body and darkens the sound; high notes take noticeably more air.
Detail 04
Wide rim paired with deep cup
Both changes push the same direction. Expect a real jump in low-register response and a real cost in endurance.
Detail 05
Rim width and bite
Broader rims spread pressure over more lip, so long sessions hurt less, but slotting feels less precise.
Final check
Know before you order
- 01Confirm your slide receiver is large shank before ordering — bore size varies by model
- 02Mouthpiece only. No pouch, cap, or cleaning brush included
- 03Give it two weeks. A rim change feels wrong before it feels right
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this fit my tenor trombone?
Only if your horn has a large-shank receiver, which usually means a .547 bore or larger. Most student and intermediate tenors take a small shank and will not accept it.
02Is 1-1/4G a good bass trombone size?
It is a common bass trombone choice — wide enough for the low register without going to the largest sizes. Players wanting more weight step up to a 1G; those wanting less go to 1-1/2G.
03Will a bigger mouthpiece improve my low notes?
It helps the low register speak with more body, yes. It will not replace air support, and it typically makes the upper register harder to hold together.
04Can a student start on this?
Not recommended. The wide rim and deep cup demand more air and lip strength than a developing player usually has. Start smaller and move up when the low range needs it.
