Which has a bigger cup — Bach 5C or GR Technologies 64MS?

The GR Technologies 64MS has a cup diameter of 16.26 mm / 0.6402 in compared to 16.25 mm / 0.6398 in on the Bach 5C — a difference of 0.01 mm / 0.0004 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 5C and GR Technologies 64MS?

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

Bach 5C vs GR Technologies 64MS

Name: GR Technologies 64MS
Brand: GR Technologies

The GR Technologies 64MS 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 5C

• Trumpet

Throat diameter3.66 mm / 0.1441 in

Best suited for

🎵All-round versatile — balanced cup for general playing

Mouthpiece B

GR Technologies 64MS

• Trumpet

Throat diameter—

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 5C details GR Technologies 64MS details Bach 5C equivalents GR Technologies 64MS equivalents

Bach 5C vs GR Technologies 64MS

Playing Characteristics

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