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

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 4M — 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 4M?

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

Bob Reeves DR DINO vs Giardinelli 4M

Name: Giardinelli 4M
Brand: Giardinelli

The Bob Reeves DR DINO has a wider cup diameter.

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

Bob Reeves DR DINO

• Baritone / Euphonium

Backbore—

Mouthpiece B

Giardinelli 4M

• Baritone / Euphonium

Backbore1/4" (.250)

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

Bob Reeves DR DINO vs Giardinelli 4M

Playing Characteristics

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