Detail 01
1-1/2C size
Near the large end of Bach's range. Lower numbers mean bigger rims, so this is a wide-diameter mouthpiece.
Product detailSKU #1274115059857
BachCornet Mouthpiece Group I 1-1/2C
Independent shopping perspective
The Korena take
Bach cornet mouthpiece in a large 1-1/2C size. For developed cornet players who want a bigger rim and a fuller low and middle register.
Strong match
Who this is for
- Brass band cornet players wanting a broad, dark sound
- Doublers moving from a large trumpet mouthpiece to cornet
- Players with an established embouchure who find small rims cramped
Consider the trade-offs
When to look elsewhere
- Beginners — the rim is well above typical starter sizes
- Players who need effortless high register
- Trumpets — the shank taper is different
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
C cup
Medium depth. Keeps a general-purpose response instead of pushing hard toward either extreme of the register.
Detail 03
Group I shank
Bach's cornet shank grouping. Check your cornet's receiver, since Group II is a different taper and will not seat the same.
Detail 04
Cornet, not trumpet
Shorter and a different taper. A trumpet mouthpiece will sit wrong in a cornet receiver and skew intonation.
Detail 05
Large rim diameter
More lip inside the cup. Usually more volume and low-end body, and more work to hold the top of the range.
Final check
Know before you order
- 01Mouthpiece only — no pouch, brush, or case
- 02Confirm your cornet takes a Group I shank before ordering
- 03Coming from a 7C, expect weeks of embouchure adjustment
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is 1-1/2C too big for me?
If you are on a 7C or 5C now, yes, this is a large step up. It rewards a strong embouchure with more sound and suffers if yours is still developing.
02Will this fit my trumpet?
No. This is a cornet mouthpiece with a cornet shank. Trumpets need a trumpet mouthpiece.
03What is Group I?
Bach's shank grouping for cornet mouthpieces. Your cornet's receiver has to match, so check the horn before buying — Group II mouthpieces have a different taper.
04Will it make my high notes harder?
Likely, if you are coming from something smaller. Larger rims generally trade upper-register ease for more low-end body and volume.
