The R4 is a trumpet with countless possibilities that allows the player a wide spectre of sound colours ranging from very bright to dense and dark, yet with a very fast response and accuracy of articulation.
- ML bore: 11.7 mm (0.461″)
- Lightweight or Standard weight valve casing
- One-piece hand-hammered bell
- Bell material: brass
- Bell diameter: 122 mm (4.807″)