Detail 01
Large shank
The taper that fits the leadpipe. Large shank will not seat in a medium-shank receiver, so check your horn first.

Independent shopping perspective
Silver-plated large-shank euphonium mouthpiece, SM3 size. Aimed at players doing solo and lead work who want projection with a warm tone.

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
The taper that fits the leadpipe. Large shank will not seat in a medium-shank receiver, so check your horn first.
Detail 02
A mid-size rim in this series. Wider than the SM5 and SM6, narrower than the SM2, so endurance and flexibility sit in between.
Detail 03
Shapes the air past the throat toward a warmer, rounder sound rather than a hard, bright edge.
Detail 04
Sets how much the mouthpiece pushes back. This size gives resistance you can lean on for projection instead of a wide-open blow.
Detail 05
A moderately wide rim. More contact spreads pressure across the lip, which helps on long sessions.
Detail 06
Standard plating finish. Feels slightly grippier than gold and holds up to regular handling.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Shank size. Both share a 26.40mm cup, 6.80mm rim and 7.38mm throat. SM3 is large shank, SM3M is medium shank. Pick by what your horn's receiver takes.
SM4 has a slightly smaller 26mm cup with the same throat, aimed at clarity up top. SM3 has the wider cup and is set up for projection with a warm tone.
Only if it has a large-shank receiver. Many euphoniums are medium shank. Check before ordering; the SM3M is the same cup in a medium shank.
It is a solo-oriented mouthpiece with a fairly large cup. A student still building embouchure may find a smaller cup, like the SM5, easier to control.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.