Detail 01
3C rim size
Wider than a 7C. More lip inside the cup, so low notes open up and endurance changes.
Product detailSKU #1274115059979
BachCornet Mouthpiece Group I 3C
Independent shopping perspective
The Korena take
A 3C cornet mouthpiece — medium cup, medium rim. The common step up from a student piece for players wanting more volume and a fuller low register.
Strong match
Who this is for
- Cornet players moving off a small student mouthpiece
- Concert band and brass band work needing a broader sound
- Players whose upper lip pinches out on smaller cups
Consider the trade-offs
When to look elsewhere
- Trumpet players — the shank is cornet-taper, not trumpet
- Lead players chasing easy high register above the staff
- Beginners in a first year of playing
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 depth
Medium depth. Middle-ground tone — not the bright shallow sound, not a dark deep-cup flugel-like sound.
Detail 03
Group I
Bach's standard rim contour group. Rim shape stays consistent as you move between sizes in the group.
Detail 04
Cornet shank
Shorter, more tapered than a trumpet mouthpiece. It will not seat correctly in a trumpet leadpipe.
Detail 05
Silver plating
Standard finish. Some players react to silver on the lips; gold-plated pieces exist for that reason.
Final check
Know before you order
- 01Confirm your cornet takes a standard shank — some older or British models differ
- 02Sold as the mouthpiece alone; no pouch or case included
- 03Expect a few weeks of adjustment if you're coming off a 7C
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Is a 3C bigger than a 7C?
Yes. The 3C has a wider rim diameter. Lower Bach numbers mean larger cups, so 3C is a step up in size from 7C.
02Will this fit my trumpet?
No. This is a cornet mouthpiece with a cornet shank. Trumpet leadpipes need a trumpet mouthpiece or a cornet-to-trumpet adapter.
03Is 3C good for a beginner?
It's usually a second mouthpiece rather than a first. Most beginners start on a 7C and move up once their embouchure settles.
04Will it make my high notes easier?
Generally the opposite. The larger cup favors low and middle register power and fullness; smaller cups tend to help the upper register.
