I found the mouthpiece to be highly responsive and flexible across the range. It was very easy to adapt to and was also very comfortable on the embouchure.
As a soloist, it assists with projection, clarity, articulation and resonance. As a supporting player, it will also give warmth, depth and fullness to tone. In summary, it will enhance euphonium playing for all abilities.
It is, perhaps, more expensive than some of the other choices on the market, but the phrase ‘you get what you pay for’ rings true in this case. With Denis Wick, you are safe in the knowledge that this is a quality piece of workmanship, which has been subjected to rigorous testing. Combine this with Steven Mead’s name and you’re getting cutting-edge innovative mouthpiece design focused on improving all aspects of sound and quality.
In my opinion, the SM4U Ultra would be an excellent choice for any player.
Michael Dodd writing in Brass Band World, February 2010.