Bach Classic Large Shank Trombone Mouthpiece 4G, Silver Plated

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SKU: 3414G
By Bach

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Large Shank Trombone Mouthpiece, 4G Cup, Deep Depth, 26mm Diameter, Medium-wide slightly rounded Rim Shape, 0.276" Throat, 429 Backbore


  • 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.
  • Large shank for use with large bore tenor and bass trombones
  • It gives a full rich sound in all registers of the instrument, making it versatile and a popular all round mouthpiece.
  • 0.276-inch throat supports endurance and a brighter tone

- Click HERE for Bach Mouthpiece Guide -


Bach innovated on the most consistent brass mouthpieces in the industry by making them lead-free. Don't take the risk - it's better to play it safe with Bach mouthpieces.


  • Instrument: Trombone, large shank
  • Model: 3415G
  • Size: 5G
  • Cup Depth: Deep
  • Cup Diameter: 25.50mm
  • Rim: Medium-wide, semi-flat
  • Throat: 0.276"
  • Backbore: 429 Backbore
  • Material: Brass
  • Finish: Silver-plated
  • Made in USA


Bach History:

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.

Bach continues 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.

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.

Classic Series:

Vincent Bach was a rare combination of artist and engineer. He constantly changed his mouthpieces in search of the perfect design. It wasn't until the mid 1960's that he stopped and finally settled on more standardized design. It was around this time that the formalization of the 27 throat and backbore to cup letter (A=24, B=7, C= 10, etc.) created a standard for mouthpiece making that is still used today. These standards are now known as the Classic Series.