Bach 12C vs Giardinelli 5D
The Giardinelli 5D has a wider cup diameter, the Giardinelli 5D features a deeper cup, the Giardinelli 5D has a larger throat opening.
Cup Diameter
The Giardinelli 5D has a cup diameter of 25.00 mm / 0.9843 in compared to 24.50 mm / 0.9646 in on the Bach 12C — a difference of 0.50 mm / 0.0197 in. A wider cup generally produces a fuller, darker tone but requires more air support.
Cup Depth
The Giardinelli 5D has a deep cup while the Bach 12C has a shallow cup. Deeper cups favor a darker, richer sound; shallower cups provide more brightness and easier upper register.
Throat Diameter
The Giardinelli 5D has a wider throat (6.00 mm / 0.2362 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 12C with others
Compare Giardinelli 5D with others
Popular Trombone comparisons
- Bach 12E vs Bob Reeves 5G Gladstone
- Yamaha SL-YEO-S vs Marcinkiewicz ET3C. Loper
- Giardinelli Sym. T vs Bach 12E
- Schilke 45B vs Marcinkiewicz ET3C. Loper
- Denis Wick 6BL vs Conn Connstellation 7CW
- Yamaha SL-48DL vs Yamaha SL-YEO-S
- Conn Connstellation 7CW vs Bach 6½A (small shank)
- Giardinelli Sym. T vs Bruno Tilz 306-5 GS