Which has a bigger cup — Bach 15 or Giardinelli 6D?

The Giardinelli 6D has a cup diameter of 24.50 mm / 0.9646 in compared to 24.40 mm / 0.9606 in on the Bach 15 — a difference of 0.10 mm / 0.0039 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 15 and Giardinelli 6D?

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

Bach 15 vs Giardinelli 6D

Name: Giardinelli 6D
Brand: Giardinelli

The Giardinelli 6D has a wider cup diameter, the Giardinelli 6D has a larger throat opening.

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

Bach 15

• Baritone / Euphonium

Backbore—

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣High-volume projection — open throat for power

Mouthpiece B

Giardinelli 6D

• Baritone / Euphonium

Backbore15/64" (.234)

Best suited for

🎻Orchestral playing — large cup for full, dark tone

📣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 Bach 15 details Giardinelli 6D details Bach 15 equivalents Giardinelli 6D equivalents

Bach 15 vs Giardinelli 6D

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bach 15 with others

Compare Giardinelli 6D with others

Popular Baritone / Euphonium comparisons

Bach vs Giardinelli

Browse by specification