Which has a bigger cup — Bach 8 or Bob Reeves DR DINO?

The Bob Reeves DR DINO has a cup diameter of 25.55 mm / 1.0059 in compared to 24.75 mm / 0.9744 in on the Bach 8 — a difference of 0.80 mm / 0.0315 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 8 and Bob Reeves DR DINO?

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

Bach 8 vs Bob Reeves DR DINO

Name: Bob Reeves DR DINO
Brand: Bob Reeves

The Bob Reeves DR DINO has a wider cup diameter.

Overall Comparison Cup Diameter Cup Depth Rim Width Throat Diameter Backbore Finish Material

Base metal or construction (e.g. brass, stainless steel, plastic). Influences weight, response, and tone color.

Mouthpiece A

Bach 8

• Baritone / Euphonium

Material—

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Bob Reeves DR DINO

• Baritone / Euphonium

Material—

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.