Bach 4C vs Schilke 45B
The Bach 4C has a wider cup diameter, the Schilke 45B features a deeper cup, the Schilke 45B has a larger throat opening.
Cup Diameter
The Bach 4C has a cup diameter of 25.75 mm / 1.0138 in compared to 24.30 mm / 0.9567 in on the Schilke 45B — a difference of 1.45 mm / 0.0571 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Schilke 45B has a medium cup while the Bach 4C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Schilke 45B has a wider throat (5.95 mm / 0.2343 in vs 5.85 mm / 0.2303 in). A wider throat allows more air through, increasing volume and projection but reducing resistance.
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.
Compare Bach 4C with others
Compare Schilke 45B with others
Popular Trombone comparisons
- Giardinelli Sym. T vs Bach 12E
- Bach 12E vs Bob Reeves 5G Gladstone
- Yamaha SL-YEO-S vs Marcinkiewicz ET3C. Loper
- Denis Wick 6BL vs Conn Connstellation 7CW
- Schilke 45B vs Marcinkiewicz ET3C. Loper
- Yamaha SL-48DL vs Yamaha SL-YEO-S
- Conn Connstellation 7CW vs Bach 6½A (small shank)
- Schilke 53 vs Giardinelli Sym. T