Bob Reeves 5G Gladstone vs Giardinelli 4M
The Bob Reeves 5G Gladstone has a wider cup diameter, the Bob Reeves 5G Gladstone features a deeper cup.
The width of the rim surface that contacts the lips. Wider rims improve endurance; narrower rims improve flexibility.
Mouthpiece A
Bob Reeves 5G Gladstone
• Trombone
Rim width—
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Giardinelli 4M
• Trombone
Rim width—
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.