Detail 01
Backbore only
The rim and cup are a separate Warburton top. This piece screws on behind it and cannot play alone.
Product detailSKU #1275776906495
WarburtonCornet Mouthpiece Backbores 8 Backbore
Independent shopping perspective
The Korena take
A replacement backbore for the Warburton modular cornet mouthpiece system. Buy it if you already run Warburton tops and want to change your blow.
Strong match
Who this is for
- Cornet players already on a Warburton top who want a different feel
- Trying resistance changes without buying a whole new mouthpiece
- Doubling setups where one rim serves multiple backbores
Consider the trade-offs
When to look elsewhere
- Anyone without a Warburton top — this is half a mouthpiece
- Trumpet players; this is the cornet-shank version
- Beginners who need a standard one-piece mouthpiece first
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
8 backbore
One point on Warburton's numbered backbore range. The number sets the bore taper, which changes resistance and where the horn slots.
Detail 03
Cornet shank
Cut for a cornet receiver. It will not seat properly in a trumpet leadpipe.
Detail 04
Modular threaded system
Tops and backbores mix and match, so you change one variable at a time instead of rebuying a whole mouthpiece.
Final check
Know before you order
- 01You need a matching Warburton top; the backbore alone will not play
- 02Confirm your instrument takes a cornet shank, not trumpet
- 03Changing backbores shifts intonation and response — expect an adjustment period
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Does this work on its own?
No. Warburton mouthpieces are two pieces. This is the backbore; it threads onto a Warburton top that carries the rim and cup.
02What does the backbore number change?
The taper of the bore behind the cup. It shifts how much resistance you feel and how firmly notes lock in, without touching rim feel.
03Will this fit my trumpet?
This is the cornet version. Warburton makes trumpet-shank backbores separately — match the shank to the horn's receiver.
04Do I need to change my top too?
No. That is the point of the system. Keep the rim and cup you know and swap only the backbore to change the blow.
