Which has a bigger cup — Bach 16 or Kelly MC?

The Kelly MC has a cup diameter of 16.76 mm / 0.6598 in compared to 16.25 mm / 0.6398 in on the Bach 16 — a difference of 0.51 mm / 0.0201 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 16 and Kelly MC?

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

Bach 16 vs Kelly MC

Name: Kelly MC
Brand: Kelly

The Kelly MC has a wider cup diameter, the Bach 16 has a larger throat opening.

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 16

• French Horn

Rim width—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Kelly MC

• French Horn

General

Rim width—

Best suited for

📣High-volume projection — open throat for power

📋All-purpose French horn

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 16 details Kelly MC details Bach 16 equivalents Kelly MC equivalents

Bach 16 vs Kelly MC

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bach 16 with others

Compare Kelly MC with others

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