Bob Reeves 43W/HF vs Bruno Tilz 210-S 4 E
The Bob Reeves 43W/HF has a wider cup diameter, the Bob Reeves 43W/HF features a deeper cup.
The internal diameter of the cup, measured at the widest point inside the rim.
Mouthpiece A
Bob Reeves 43W/HF
• Flugelhorn
Cup diameter17.07 mm / 0.6720 in
Best suited for
Orchestral playing — large cup for full, dark tone
vs
Mouthpiece B
Bruno Tilz 210-S 4 E
• Flugelhorn
CatalogCup diameter16.50 mm / 0.6496 in
Best suited for
Screamer / high notes — tight throat with shallow cup
Cup Diameter
The Bob Reeves 43W/HF has a cup diameter of 17.07 mm / 0.6720 in compared to 16.50 mm / 0.6496 in on the Bruno Tilz 210-S 4 E — a difference of 0.57 mm / 0.0224 in. A wider cup generally produces a fuller, darker tone but requires more air support.
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.