Which has a bigger cup — Bach 3C or GR Technologies 64M?

The Bach 3C has a cup diameter of 16.30 mm / 0.6417 in compared to 16.26 mm / 0.6402 in on the GR Technologies 64M — a difference of 0.04 mm / 0.0016 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 3C and GR Technologies 64M?

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

Bach 3C vs GR Technologies 64M

Name: GR Technologies 64M
Brand: GR Technologies

The Bach 3C has a wider cup diameter.

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

The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.

Mouthpiece A

Bach 3C

• Trumpet

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

GR Technologies 64M

• Trumpet

Rim width—

Best suited for

🎵All-round versatile — balanced cup for general playing

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.

Open in interactive tool + Add third mouthpiece Bach 3C details GR Technologies 64M details Bach 3C equivalents GR Technologies 64M equivalents

Bach 3C vs GR Technologies 64M

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

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