The Commercial series was designed specifically for lead trumpet players looking for greater depth of sound and volume when playing in higher registers.
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3S - Medium wide. Slightly flatter rim face than standard Bach 3C. Large diameter mouthpiece with a shallow cup. Special backbore helps facilitate the high register.
- 7S - Medium wide. Slightly flatter rim face than standard Bach 7C. Medium diameter mouthpiece with a shallow cup. Special backbore helps facilitate the high register.