Which has a bigger cup — Bob Reeves DR DINO or Giardinelli 4D?

The Bob Reeves DR DINO has a cup diameter of 25.55 mm / 1.0059 in compared to 25.40 mm / 1.0000 in on the Giardinelli 4D — a difference of 0.15 mm / 0.0059 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves DR DINO and Giardinelli 4D?

The Giardinelli 4D has a deep cup while the Bob Reeves DR DINO has a medium cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bob Reeves DR DINO vs Giardinelli 4D

Name: Giardinelli 4D
Brand: Giardinelli

The Bob Reeves DR DINO has a wider cup diameter, the Giardinelli 4D features a deeper cup.

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

Bob Reeves DR DINO

• Baritone / Euphonium

Throat diameter—

Mouthpiece B

Giardinelli 4D

• Baritone / Euphonium

Throat diameter6.40 mm / 0.2520 in

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 Bob Reeves DR DINO details Giardinelli 4D details Bob Reeves DR DINO equivalents Giardinelli 4D equivalents

Bob Reeves DR DINO vs Giardinelli 4D

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bob Reeves DR DINO with others

Compare Giardinelli 4D with others

Popular Baritone / Euphonium comparisons

Bob Reeves vs Giardinelli

Browse by specification