Detail 01
Helleburg-style design
A funnel-leaning cup shape known for a broad, round tuba sound rather than a bright, edgy one.

Independent shopping perspective
Yamaha's 66B tuba mouthpiece: a Helleburg-style rim and shape with a shallower cup, for players wanting Helleburg feel with more high-register ease.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
A funnel-leaning cup shape known for a broad, round tuba sound rather than a bright, edgy one.
Detail 02
Trades some low-end depth for a clearer, more responsive upper register and less air per note.
Detail 03
Sits in Yamaha's range next to the 66 and 67, the sizes aimed at BBb and CC tubas rather than small F horns.
Detail 04
Machined to consistent tolerances at a mid price, so a replacement years later should feel the same.
Detail 05
Mid-tier for tuba. Above student pieces, below custom and boutique work, where prices roughly double.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same Helleburg-based design, but the 66B has a shallower cup. Expect a slightly lighter low end and an easier, more responsive top.
It uses Yamaha's standard large tuba shank. Receivers differ between makers and models, so check your horn's shank size before ordering.
It works, though the shallower cup gives less low-end weight than a full Helleburg. If marching depth is the priority, a deeper cup suits better.
Yes. Stock mouthpieces are usually generic. The Helleburg-derived shape gives a more defined sound and more consistent response across the range.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.