Description
NEW Alliance ‘RM3A’ Cornet mouthpiece in silver plate.
Please note that with effect from 1st January 2026 Alliance mouthpieces will no longer be supplied with a leather pouch, however these can be purchased separately.
Alliance signature line developed and used by Richard Marshall, Principal Cornet of the Black Dyke Brass Band.
With a slightly shallower cup and modified backbore providing a beautiful clear tone.
This mouthpiece improves the higher register response and is generally easier to play than the RM3.
Best-selling Richard Marshall model.
Cup Diameter: 16.50mm
Rim: 5.15mm
Bore: 4.50mm
Cup: Shallow
Comparison: Denis Wick 4B







