Which has a bigger cup — Bach 12E or Bob Reeves DR SOLO?

The Bob Reeves DR SOLO has a cup diameter of 25.55 mm / 1.0059 in compared to 24.50 mm / 0.9646 in on the Bach 12E — a difference of 1.05 mm / 0.0413 in. A wider cup generally produces a fuller, darker tone but requires more air support.

How does cup depth compare between Bach 12E and Bob Reeves DR SOLO?

The Bob Reeves DR SOLO has a medium cup while the Bach 12E has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.

Bach 12E vs Bob Reeves DR SOLO

Name: Bob Reeves DR SOLO
Brand: Bob Reeves

The Bob Reeves DR SOLO has a wider cup diameter, the Bob Reeves DR SOLO 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

Bach 12E

• Trombone

Throat diameter5.85 mm / 0.2303 in

Best suited for

📣High-volume projection — open throat for power

Mouthpiece B

Bob Reeves DR SOLO

• Trombone

Throat diameter—

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 Bach 12E details Bob Reeves DR SOLO details Bach 12E equivalents Bob Reeves DR SOLO equivalents

Bach 12E vs Bob Reeves DR SOLO

Playing Characteristics

What Do These Model Names Mean?

What Changes If You Switch?

Which is better?

Compare Bach 12E with others

Compare Bob Reeves DR SOLO with others

Popular Trombone comparisons

Bach vs Bob Reeves

Browse by specification