Detail 01
17mm cup diameter
The widest cup in the line. More lip vibrating gives a bigger sound, and asks for more air to keep it centred.

Independent shopping perspective
Gold-finish cornet mouthpiece, 17mm cup with an open backbore. For established players who want a large, well-rounded sound and a free blow.

Strong match
Consider the trade-offs
What matters in use
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 01
The widest cup in the line. More lip vibrating gives a bigger sound, and asks for more air to keep it centred.
Detail 02
Narrower than the 5.5mm BW rims. More flexible for slurs, but pressure sits on less lip, so endurance is shorter.
Detail 03
Among the widest throats offered. Little resistance to push against, so air moves freely and the mouthpiece blows easy.
Detail 04
Broader and less focused than the V-type models. That is where the round, well-rounded quality comes from rather than a tight core.
Detail 05
Surface only. Cup, rim, throat and backbore are unchanged, so how it plays comes entirely from the size 2 geometry.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same 17mm cup and 4.92mm rim. The 2B tightens the throat to 4.27mm and uses a V backbore for clarity up high. The 2 blows freer and rounder.
No. It is a cornet mouthpiece with a cornet shank. A trumpet receiver takes a different taper, so you need a trumpet mouthpiece.
If you already tire on a 4 or 5, yes — the wider cup and free blow use more air. It suits players with settled air support and embouchure.
The 2BW keeps the 17mm cup but widens the rim to 5.5mm and uses a V backbore with a 4.27mm throat. More comfort and clarity up high, less free blow.
Reference
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