Detail 01
1 rim size
Bach's largest standard diameter. Maximum lip vibration and low-end volume, but it demands serious air.
Product detailSKU #1274115059547
BachLarge Shank Trombone Mouthpiece 1G
Independent shopping perspective
The Korena take
Bach 1G large shank trombone mouthpiece — a very large, deep cup built for bass trombone and low-register work in orchestral and big band settings.
Strong match
Who this is for
- Bass trombone players needing pedal register and volume
- Orchestral low brass sections wanting a broad, dark core
- Doublers moving from tenor to bass trombone parts
Consider the trade-offs
When to look elsewhere
- Tenor trombone players — the shank will not fit a small-bore horn
- Lead trombone chairs needing bright top-end and easy high notes
- Students still developing air support for a large cup
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
G cup
Deep cup profile. Darker, rounder tone with strong fundamental — built for the bottom of the range.
Detail 03
Large shank
Fits large-bore trombones and bass trombones. Will not seat correctly in a small-shank tenor receiver.
Detail 04
Bach standard series build
One-piece brass with silver plating. Consistent cup geometry across replacements if you lose one.
Detail 05
Wide rim contour
The large diameter spreads pressure, but there is less rim to brace against on long high passages.
Final check
Know before you order
- 01Confirm your horn takes a large shank before ordering — measure the receiver
- 02Mouthpiece only; no case or cleaning brush included
- 03Stepping up to a 1G takes weeks of air-support adjustment
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will the 1G fit my tenor trombone?
Only if your tenor has a large-shank receiver, common on large-bore symphonic tenors. Standard small-bore tenors take a small shank and this will not seat.
02Is the 1G a bass trombone mouthpiece?
It is the size most commonly used on bass trombone. The 1 diameter with the G cup depth is aimed squarely at the low register.
03How does the G cup compare to a 1-1/2G?
The 1G has a larger rim diameter. Same deep cup character, more lip area vibrating, more low-end volume, more air required.
04Do I need to change anything on my horn?
No. It drops into a large-shank receiver as-is. No adapters or modification needed if the shank size matches.
