Bob Reeves DR DINO vs Giardinelli 5M
The Bob Reeves DR DINO has a wider cup diameter.
Mouthpiece A
Bob Reeves DR DINO
• Baritone / Euphonium
Cup diameter25.55 mm
Cup depthMedium
Rim width—
Throat diameter—
Backbore—
Finish—
Material—
vs
Mouthpiece B
Giardinelli 5M
• Baritone / Euphonium
Cup diameter25.00 mm
Cup depthMedium
Rim width—
Throat diameter6.00 mm
Backbore15/64" (.234)
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Bob Reeves DR DINO has a cup diameter of 25.55 mm compared to 25.00 mm on the Giardinelli 5M — a difference of +0.55 mm. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
Both mouthpieces share a medium cup depth, so the sound character from depth alone will be very similar.
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.