Bach – Classic Series Large Shank Tenor & Bass Trombone Mouthpieces

For a guide to Bach’s mouthpieces, click here to view their mouthpiece manual.

Vincent Bach was a rare combination of artist and engineer. He was constantly changing his mouthpiece designs until the mid 1960’s when they became more standardized.

Models available

Model Cup
Depth Cup
Dia.
(mm) Rim
Shape Throat Back
bore Description 1G Deep 28 Medium
thin, well
rounded .319″ 800S Extra large and deep for extraordinary power and depth of tone. Among the largest and most powerful bass trombone mouthpieces produced today. 1G Deep 27.5 Medium
thin, well
rounded .276″ 429 Cup diameter is smaller than No. 1G, but still very large and deep, with the sonority preferred by the modern American school. 1GM Deep 27.5 Medium
thin, well
rounded .319″ 800S Same rim and cup as No. 1 1/4G, but with a larger throat and backbore for large, powerful sound, well in tune. 1G Deep 27 Medium
thin, well
rounded .276″ 429 A large mouthpiece with powerful tone in the low register and great carrying power. For many years, the standard mouthpiece for the serious bass trombone player. 1GM Deep 27 Medium
thin, well
rounded .319″ 800S Larger throat and backbore than the No. 11/2G results in less resistance, larger dynamic range, deeper, warmer sound. 2G Deep 26.75 Medium
narrow .276″ 429 Deep, full, resonant tone. Big low register even through the pedal tones. 3G Deep 26.26 Medium
thin, well
rounded .276″ 429 Same rim shape and diameter as No. 3 small shank tenor trombone, but with a deep bass trombone cup, throat, and backbore to facilitate pedal tones. 4G Deep 26 Medium
thin,
slightly
rounded .276″ 429 Same rim shape and diameter as No. 4 small shank tenor trombone. A versatile, large diameter mouthpiece especially useful when only one trombone is used for both the upper and very low register. 4GB Deep 26 Medium
thin,
very well
rounded .276″ 429 Same cup, throat and backbore as the No. 4G with a more rounded rim 5G Deep 25.5 Medium
wide,
semi-flat .276″ 429 Same rim shape and diameter as No. 5 small shank tenor trombone. Similar playing characteristics to the 4G with a slightly smaller cup diameter. 5GL Medium
deep 25.5 Medium
wide,
semi-flat .276″ 429 Old style, shallower model than No. 5G, facilitates upper range. 5GB Deep 25.5 Medium
thin,
very well
rounded .276″ 429 Same cup, throat and backbore as the No. 5G with a more rounded rim. 5GS Medium
deep 25.5 Medium
wide,
semi-flat .261″
“G” 429
(modified) Shallower “G”-style cup with smaller throat and backbore than No. 5G produces easy high register, slightly brighter sound. 6A Medium
deep 25.4 Medium
wide,
well-
rounded .276″ 429 Same rim and cup as No. 61/2A small shank tenor trombone, but with full bass trombone throat and backbore for a rich, compact sound of large volume. 6AL Medium
deep 25.4 Medium
wide,
well-
rounded .261″
“G” 420 The same cup, throat, and backbore as No. 61/2AL small shank tenor trombone but with bass shank. It requires a well developed embouchure. 6AM Medium
deep 25.4 Medium
wide,
well-
rounded .257″
“F” 413 The same rim, cup, throat, and backbore as No. 61/2AM small shank tenor trombone mouthpiece, but with bass shank.

About Bach mouthpieces

The history of Bach starts with mouthpieces. A century ago, trumpet player Vincent Bach began experimenting with designs and manufacturing processes to replace a broken mouthpiece. Soon after, Vincent Bach”s mouthpieces, and later his trumpets, set the standard for excellence.

We continue that standard today through constant innovation and dedication to the craft. In the Bach workshop, crafting a mouthpiece begins with innovative, yet classic designs and is then carved by a computer-numeric-controlled machine that shapes and cuts solid brass bars. Each step is precise within one ten-thousandth of an inch.

When selecting a Bach trumpet, cornet and fluegelhorn mouthpieces, a brass instrumentalist should choose one that allows the player to produce a solid, compact tone of large volume. A carefully selected Bach mouthpiece can help improve a player’s embouchure, attack, tonguing, and endurance.

Because no two players have the same lip or tooth formation, what is perfect for one player may be entirely unsuitable for another. Bach produces thousands of different combinations of rims, cups and backbores so that each player can find the best mouthpiece for their individual embouchure.

Visit us at and try several genuine Bach mouthpiece models, all stamped with the Vincent Bach trademark.