The CHI Brass Jacobs 2 Tuba Mouthpiece is a modern recreation of a classic 1930s-era Helleberg-style mouthpiece used and cherished by legendary Chicago Symphony tubist Arnold Jacobs. Carefully developed in collaboration with Jacobs’ longtime associate Brian Frederiksen (author of Arnold Jacobs: Song and Wind), this model reflects the essential qualities Jacobs valued in his own equipment.
Originally part of a small batch of custom mouthpieces made in the 1980s, the Jacobs 2 offers a unique blend of tonal clarity, projection, and flexibility. Jacobs had multiple variations of this design made over the years, and today these originals are preserved in Frederiksen’s collection. This CHI Brass edition faithfully captures that iconic sound and feel while enhancing playability for today’s tubists.
Designed to fit modern tubas, the CHI Brass Jacobs 2 is available in two shank options that work well for most tubas built after 1976:
A shank: 0.530in, small American shank from the original Helleberg mouthpiece
Standard Chi Shank: 0.5in25, standard, large European shank
Overall Length: 3.95″
Maximum Outer Diameter (OD): 1.868″ (47.45 mm)
Inner Diameter (ID at 0.060″ depth): 1.287″ (32.7 mm)
Throat Diameter: 0.3236″ (8.22 mm)
Shank Size Options:
Standard CHI Shank
A or S Shank (Small American Taper)
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