Bach Classic 6.5AL Small Shank Trombone Mouthpiece Overview

The Bach 3506HAL 6 1/2AL is a small shank trombone mouthpiece in Bach’s Standard Series, featuring the familiar 6 1/2AL rim and cup paired with a larger bore and a special backbore designed to help produce a more Germanic tonal concept while maintaining a centered, versatile response.

Bach 3506HAL Trombone Mouthpiece Specifications

• Small shank trombone mouthpiece
• Model: 3506HAL (Classic 6.5AL)
• Finish: Silver-plate
• Cup Depth: Medium Deep
• Cup Diameter: 25.4 mm
• Rim Shape: Medium Wide
• Bore: 6.63 mm (G)
• Backbore: #420

Condition 

Brand new in the original manufacturer’s packaging

Who the 3506HAL 6.5AL Trombone Mouthpiece is For

The Bach 3506HAL 6 1/2AL is a small shank trombone mouthpiece designed for players who want the familiar 6 1/2AL feel with a tonal profile that leans more Germanic in color and core. It keeps a standard rim and cup geometry for comfortable endurance and predictable articulation, while the larger bore and #420 backbore are intended to support a broader, more projecting sound concept.

This model is also a practical choice for euphonium players seeking a round, mellow tone with strong volume and carrying power, especially when a small shank receiver is required. It is well-suited to advancing students, serious amateurs, and working musicians who need a dependable mouthpiece for ensemble playing where clarity and projection matter.

Common Questions About The Bach 3506HAL

Is the Bach 3506HAL 6.5AL the same as a standard 6.5A?

While both share an identical 25.40mm cup diameter and a medium-deep cup, the "L" signifies specific interior modifications designed to back a darker, more traditional German sound structure.

Will this fit my trombone?

This is a small shank mouthpiece. It fits trombones with a small shank (small bore) receiver and will not fit large shank receivers without an adapter.

Can euphonium players use this mouthpiece?

Yes. Bach recommends this model for euphonium players who want a round, mellow tone with substantial volume and carrying power, provided the instrument uses a small shank receiver.

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