Bach L.B. Trombone / Euphonium Mouthpiece

Model Cup Depth Cup Diameter Rim Shape Description 1G Deep  28.00mm Medium thin, well rounded Extra-large and deep cup for extraordinary power and depth of tone. Among the largest bass trombone mouthpieces produced. 1.25G Deep 27.50mm Medium thin, well rounded Cup diameter is smaller than a '1G', but still very large and deep, with the sonority preferred by the modern American school.  1.25GM Deep 27.50mm Medium thin, well rounded Same rim and cup as '1.25G' but with a larger throat and backbore for large, powerful sound.  1.5G Deep 27.00mm Medium wide, well rounded 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.  1.5GM Deep 27.00mm Medium wide, well rounded Larger throat and backbore than the '1.5G', results in less resistance, larger dynamic range, deeper, warmer sound.  2G Deep 26.75mm Medium narrow.  Deep, full, resonant tone. Big low register even through the pedal tones. 3G Deep 26.26mm Medium wide, well rounded Same rim shape and diameter as '3' small shank tenor trombone, but with a deep bass trombone cup, throat and backbore to facilitate pedal tones.  4G Deep 26.00mm Medium wide, slightly rounded The same rim shape and diameter as '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 26.00mm Medium thin, slightly rounded Same cup, throat and backbore as the '4G' with a more rounded rim. 5G Deep 25.50mm Medium wide, semi-flat Same rim shape and diameter as '5' small shank tenor trombone. Similar playing characteristics to '4G' with a slightly smaller cup diameter.  5GS Medium Deep 25.50mm Medium wide, semi-flat Shallower 'G' style cup with smaller throat and backbore than '5G' produces easy high register and slightly brighter sound.  6.5A Medium Deep 25.40mm Medium wide,well rounded  The same cup, throat and backbore as '6.5AL' small shank tenor trombone but with full bass trombone throat and backbore for a rich, compact sound of large volume.  6.5AL Medium Deep 24.50mm Medium wide,well rounded  The same cup, throat and backbore as '6.5AL' small shank tenor trombone but with bass shank. It requires a well developed embouchure.  6.5AM Medium Deep 25.40mm Medium wide,well rounded  The same rim, cup and throat as '6.5AM' small shank tenor trombone mouthpiece but with bass shank.
Model Cup Depth Cup Diameter Rim Shape Description 1G Deep  28.00mm Medium thin, well rounded Extra-large and deep cup for extraordinary power and depth of tone. Among the largest bass trombone mouthpieces produced. 1.25G Deep 27.50mm Medium thin, well rounded Cup diameter is smaller than a '1G', but still very large and deep, with the sonority preferred by the modern American school.  1.25GM Deep 27.50mm Medium thin, well rounded Same rim and cup as '1.25G' but with a larger throat and backbore for large, powerful sound.  1.5G Deep 27.00mm Medium wide, well rounded 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.  1.5GM Deep 27.00mm Medium wide, well rounded Larger throat and backbore than the '1.5G', results in less resistance, larger dynamic range, deeper, warmer sound.  2G Deep 26.75mm Medium narrow.  Deep, full, resonant tone. Big low register even through the pedal tones. 3G Deep 26.26mm Medium wide, well rounded Same rim shape and diameter as '3' small shank tenor trombone, but with a deep bass trombone cup, throat and backbore to facilitate pedal tones.  4G Deep 26.00mm Medium wide, slightly rounded The same rim shape and diameter as '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 26.00mm Medium thin, slightly rounded Same cup, throat and backbore as the '4G' with a more rounded rim. 5G Deep 25.50mm Medium wide, semi-flat Same rim shape and diameter as '5' small shank tenor trombone. Similar playing characteristics to '4G' with a slightly smaller cup diameter.  5GS Medium Deep 25.50mm Medium wide, semi-flat Shallower 'G' style cup with smaller throat and backbore than '5G' produces easy high register and slightly brighter sound.  6.5A Medium Deep 25.40mm Medium wide,well rounded  The same cup, throat and backbore as '6.5AL' small shank tenor trombone but with full bass trombone throat and backbore for a rich, compact sound of large volume.  6.5AL Medium Deep 24.50mm Medium wide,well rounded  The same cup, throat and backbore as '6.5AL' small shank tenor trombone but with bass shank. It requires a well developed embouchure.  6.5AM Medium Deep 25.40mm Medium wide,well rounded  The same rim, cup and throat as '6.5AM' small shank tenor trombone mouthpiece but with bass shank.

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