Detail 01
26.40mm cup diameter
The largest in this Ultra range except the SM2U. More lip vibrating area, more low-end body, faster fatigue.
Product detailSKU #1288970926988
Denis WickDW5880E-SMU Steven Mead Ultra Series Euphonium Mouthpiece in Silver SM3U
1/2
Independent shopping perspective
The Korena take
Silver-plated Steven Mead Ultra euphonium mouthpiece, SM3U large shank: 26.40mm cup, 6.30mm rim, 7.40mm throat. The large-cup option in the range.
Strong match
Who this is for
- Experienced euphonium players wanting maximum low-register weight
- Large-shank instruments in orchestral or brass band settings
- Players with the air support to fill a 26.40mm cup
Consider the trade-offs
When to look elsewhere
- Students and returning players — the cup is demanding on endurance
- Medium-shank receivers, which need the SM3MU instead
- Players who want quick high-register access over low-end body
What matters in use
The specifications, translated
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 02
7.40mm throat
Open throat paired with a large cup. Very free blowing, but it will expose a weak air supply.
Detail 03
Large shank
Only fits large-bore euphonium receivers. The medium shank equivalent is the SM3MU.
Detail 04
6.30mm rim width
Same rim as the rest of the Ultra euphonium sizes, so switching cup sizes doesn't change how the rim sits.
Detail 05
V-type backbore
Conical taper. Keeps a large cup from turning harsh when you play loud.
Final check
Know before you order
- 01Verify large versus medium shank on your instrument first — they are not interchangeable
- 02Mouthpiece only; no case or brush included
- 03Stepping up from a 25mm-class cup takes weeks of embouchure adjustment
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How much bigger is the SM3U than the SM4U?
0.40mm wider cup — 26.40mm versus 26mm. Rim width, throat and backbore are identical, so cup diameter is the only variable.
02Will this fit a medium-shank euphonium?
No. This is the large shank version. The medium shank equivalent is the SM3MU, with the same 26.40mm cup and 7.40mm throat.
03Should I jump straight to this size?
Large cups reward strong air support and cost endurance. Moving up one size at a time is usually easier on the embouchure.
04What is the biggest in the series?
The SM2U, at 27mm cup diameter with a slightly tighter 7.30mm throat, is the largest large-shank size.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Silver
9 detailsOther
- Sm6mu
- Medium shank; 25.40mm cup diameter; 6.30mm rim width; 6.66mm throat; V-type backbore.
- Sm4mu
- Medium shank; 26mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
- Sm5mu
- Medium shank; 25.75mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
- Sm3mu
- Medium shank; 26.40mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
- Sm2u
- Large shank; 27mm cup diameter; 6.30mm rim width; 7.30mm throat; V-type backbore.
- Sm3u
- Large shank; 26.40mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
- Sm6u
- Large shank; 25.40mm cup diameter; 6.30mm rim width; 6.66mm throat; V-type backbore.
- Sm4u
- Large shank; 26mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
- Sm5u
- Large shank; 25.75mm cup diameter; 6.30mm rim width; 7.40mm throat; V-type backbore.
