Which has a bigger cup — Bach 1¼G or Bach 1G?

The Bach 1G has a cup diameter of 28.00 mm / 1.1024 in compared to 27.50 mm / 1.0827 in on the Bach 1¼G — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 1¼G and Bach 1G?

Both mouthpieces share a very deep cup depth, so the sound character from depth alone will be very similar.

Bach 1¼G vs Bach 1G

Name: Bach 1G
Brand: Bach

The Bach 1G has a wider cup diameter, the Bach 1G has a larger throat opening.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

The taper behind the throat leading to the shank. Affects projection and tone character.

Mouthpiece A

Bach 1¼G

• Trombone

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Bach 1G

• Trombone

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Which is better?

Neither mouthpiece clearly dominates the other — the right choice depends on your embouchure, playing style, and the sound you're after. Try both if possible.

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Bach 1¼G vs Bach 1G

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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