Which has a bigger cup — Bach 30E or Bach 32E?

The Bach 30E has a cup diameter of 30.00 mm / 1.1811 in compared to 29.50 mm / 1.1614 in on the Bach 32E — 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 30E and Bach 32E?

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

Bach 30E vs Bach 32E

Name: Bach 32E
Brand: Bach

The Bach 30E has a wider cup diameter.

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

The narrowest point at the bottom of the cup. Affects resistance, volume, and tone color.

Mouthpiece A

Bach 30E

• Tuba

Throat diameter8.33 mm / 0.3280 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Bach 32E

• Tuba

Throat diameter8.33 mm / 0.3280 in

Best suited for

📣High-volume projection — open throat for power

Throat Diameter

Throat diameters are essentially identical at 8.33 mm / 0.3280 in, so resistance feel will be comparable.

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 30E vs Bach 32E

Throat Diameter

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

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