This new mouthpiece designed by Aaron Tindall is the most popular of the
range, and is designed for use in 5/4 CC tubas. It has a large cup
which is a mixture of a funnel and a bowl with a large throat, and is
slightly shallower than the AT1U. This mouthpiece has already proved a
big hit with many leading American players. The rim is designed by
Warren Deck and is one of the most comfortable on the market. It
features just the right amount of width and bite to give the player a
sense of comfort and stability. This mouthpiece produces a rich and
vibrant sound with plenty of focus. There is a distinct ‘shelf’ at the
bottom of the cup which helps achieve a concentrated power that gives a
sound that really projects.