Bach 18 vs Denis Wick 6N
The Denis Wick 6N has a wider cup diameter.
Mouthpiece A
Bach 18
• French Horn
Cup diameter16.15 mm / 0.6358 in
Cup depthMedium
Rim width—
Throat diameter4.50 mm / 0.1772 in
Backbore—
Finish—
Material—
Best suited for
All-round versatile — balanced cup for general playing
High-volume projection — open throat for power
vs
Mouthpiece B
Denis Wick 6N
• French Horn
Cup diameter17.25 mm / 0.6791 in
Cup depthMedium
Rim width3.88 mm / 0.1528 in
Throat diameter4.50 mm / 0.1772 in
Backborebarrel
Finish—
Material—
Best suited for
High-volume projection — open throat for power
Cup Diameter
The Denis Wick 6N has a cup diameter of 17.25 mm / 0.6791 in compared to 16.15 mm / 0.6358 in on the Bach 18 — a difference of 1.10 mm / 0.0433 in. 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.
Throat Diameter
Throat diameters are essentially identical at 4.50 mm / 0.1772 in, so resistance feel will be comparable.
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.