Which has a bigger cup — Bob Reeves DR SOLO or Bruno Tilz 305-D 5?

The Bruno Tilz 305-D 5 has a cup diameter of 26.00 mm / 1.0236 in compared to 25.55 mm / 1.0059 in on the Bob Reeves DR SOLO — a difference of 0.45 mm / 0.0177 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bob Reeves DR SOLO and Bruno Tilz 305-D 5?

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

Bob Reeves DR SOLO vs Bruno Tilz 305-D 5

Name: Bruno Tilz 305-D 5
Brand: Bruno Tilz

The Bruno Tilz 305-D 5 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 SOLO

• Trombone

Backbore—

Mouthpiece B

Bruno Tilz 305-D 5

• Trombone

Catalog

Backbore—

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.