The Bach Standard Series Large Shank Trombone Mouthpiece in Gold is available in the following model/sizes: 1G, 1-1/4G, 1-1/4GM, 1-1/2G, 1-1/2GM, 2G, 3G, 4G, 4GB, 5G, 5GL, 5 GB, 5GS, 6-1/2A, 6-1/2AL, and 6-1/2AM
When selecting a mouthpiece, a brass instrumentalist should choose one with 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 may be entirely unsuitable for the other. Bach produces many different models so that each player can find the best mouthpiece for their individual embouchure.
A mouthpiece consists of the rim, cup, throat, and backbore. Bringing these various components into proper relationship constitutes the art of superior mouthpiece production.
In choosing a special combination of rim, cup, throat and backbore designs, consider the effects of each.
Wide: Increases endurance
Narrow: Improves flexibility, range
Round: Improves comfort
Sharp: Increases brilliance, precision of attack
Large: Increases volume, control
Small: Relieves fatigue, weakness
Deep: Darkens tone, especially in low register
Shallow: Brightens tone, improves response, especially in high register
Large: Increases blowing freedom, volume, tone; sharpens high register (largest sizes also sharpen low register
Small: Increases resistance, endurance, brilliance; flattens high register
Except in general terms, it isn't possible to identify backbores by size because they also vary in shape. Various combinations of size and shape make the tone darker or more brilliant, raise or lower the pitch in one or more registers, increase or decrease volume. In each instance, the effect depends in part on the throat and cup used in combination with the backbore.
Key To Trumpet, Cornet and Fluegelhorn Model Numbers:
Bach trumpet, cornet and fluegelhorn mouthpieces have been numbered in an orderly progression from the largest to the smallest diameters and from the deepest to the most shallow cup, each with a choice of rim designs.
Rim shape is described for each indi- vidual model throughout the catalog. Model numbers progress numerically from model #1 with the largest cup diameter, to model #20C with the smallest cup diameter.
- Model No. / Depth of Cup / Approx. Cup Dia. / Rim Shape / Throat / Backbore / Description
- 1G / Deep / 28.00 mm / 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.
- 1-1/4G / Deep / 27.50 mm / 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.
- 1-1/4GM / Deep / 27.50 mm / 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.
- 1-1/2G / Deep / 27.00 mm / Medium wide, 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.
- 1-1/2GM / Deep / 27.00 mm / Medium wide, well rounded. / .319" / 800S / Larger throat and backbore than the No.112G results in less resistance, larger dynamic range, deeper, warmer sound.
- 2G / Deep / 26.75 mm / Medium narrow. / .276" / 429 / Deep, full, resonant tone. Big low register even through the pedal tones.
- 3G / Deep / 26.26 mm / Medium wide, 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 / 26.00 mm / Medium wide, 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 / 26.00 mm / Medium thin, very well rounded. / .276" / 429 / Same cup, throat and backbore as the No.4G with a more rounded rim.
- 5G / Deep / 25.50 mm / Medium wide, semi flat. / .276" / 429 / Same rim shape and diameter as No.5 small shank tenor trombone. Similar playing characteristics to No. 4G with a slightly smaller cup diameter.
- 5GL / Medium deep / 25.50 mm / Medium wide, semi flat. / .276" / 429 / Old style, shallower model than No.5G, facilitates upper range.
- 5GB / Deep / 25.50 mm / Medium thin, very well rounded. / .276" / 429 / Same cup, throat and backbore as the No.5G with a more rounded rim.
- 5GS / Medium deep / 25.50 mm / Medium wide, semi flat. / .261" "G" / 420 (modified) / Shallower "G"-style cup with smaller throat and backbore than No. 5G produces easy high register, slightly brighter sound.
- 6-1/2A / Medium deep / 25.40 mm / Medium wide, well rounded. / .276" / 429 / Same rim and cup as No.612A small shank tenor trombone, but with full bass trombone throat and backbore for a rich, compact sound of large volume.
- 6-1/2AL / Medium deep / 25.40 mm / Medium wide, well rounded. / .261" "G" / 420 / The same cup, throat, and backbore as No.612AL small shank tenor trombone but with bass shank. It requires a well developed embouchure.
- 6-1/2AM / Medium deep / 25.40 mm / Medium wide, well rounded. / .257" "F" / 413 / The same rim, cup, throat, and backbore as No.612AM small shank tenor trombone mouthpiece, but with bass shank.