Which has a bigger cup — Kelly 51D-EU or Monette TS6 S1?

Both mouthpieces have virtually identical cup diameters at 25.40 mm / 1.0000 in.

How does cup depth compare between Kelly 51D-EU and Monette TS6 S1?

The Kelly 51D-EU has a — cup while the Monette TS6 S1 has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Kelly 51D-EU vs Monette TS6 S1

Name: Monette TS6 S1
Brand: Monette

the Kelly 51D-EU features a deeper cup.

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

Kelly 51D-EU

• Baritone / Euphonium

Professional

BackboreL

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📋Professional euphonium

Mouthpiece B

Monette TS6 S1

• Baritone / Euphonium

Backbore—

Best suited for

📣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.

Open in interactive tool + Add third mouthpiece Kelly 51D-EU details Monette TS6 S1 details Kelly 51D-EU equivalents Monette TS6 S1 equivalents

Kelly 51D-EU vs Monette TS6 S1

Playing Characteristics

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What Changes If You Switch?

Which is better?

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