Detail 01
USA large shank
Fits USA and Japanese euphoniums. Pre-1974 B&H and Willson horns take the medium-shank 6BM instead.
Product detailSKU #1274228081517
Denis WickDW5880E Classic Series Euphonium Mouthpiece - Silver, 6BY
Independent shopping perspective
The Korena take
Silver Denis Wick Classic euphonium mouthpiece, 6BY size, for USA or Japanese horns with large-shank receivers. A step up from a stock student piece.
Strong match
Who this is for
- Players on USA or Japanese euphoniums with large-shank receivers
- Wanting a clearer, more secure high register
- Moving up from the mouthpiece that shipped with the horn
Consider the trade-offs
When to look elsewhere
- Pre-1974 Boosey & Hawkes or Willson horns needing medium shank
- Players wanting the wider 26mm cup of the 4-series
- Small-shank receivers — this will not seat
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
25.40mm cup diameter
Narrower than the 4-series 26mm. Less lip inside the cup, so high notes sit easier and endurance improves.
Detail 03
6.26mm rim width
Narrower rim than the 4-series 6.72mm. More flexible between registers, slightly less cushion on long sessions.
Detail 04
7.12mm throat
Slightly tighter than the 4-series 7.38mm. Adds a little resistance, which helps centre pitch and control.
Detail 05
Medium backbore
Between the barrel and large backbores in this line. Keeps tone focused rather than spreading at volume.
Detail 06
Silver finish
Smooth and slick on the lip. Wipe it after playing; plating wears where you press hardest over years.
Final check
Know before you order
- 01Check your receiver: large shank here, medium shank on the 4AM and 6BM
- 02Nothing else included — no pouch, case or brush
- 03Changing cup size resets your embouchure; give it a couple of weeks
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Will this fit my Yamaha euphonium?
If it takes a large shank, yes — this is the USA large-shank size, made for USA and Japanese instruments. Check the receiver before ordering.
02What's the difference between 6BY and 6BM?
Same 25.40mm cup, 6.26mm rim, 7.12mm throat and medium backbore. Only the shank differs: 6BY is USA large shank, 6BM is medium shank for pre-1974 B&H and Willson.
03Is 6BY or 4AY better for low notes?
The 4AY has a wider 26mm cup and larger backbore for a more open low register. The 6BY trades some of that for a clearer, easier high register.
04Does it come with a case?
No. It ships as the mouthpiece alone.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Silver, 6BY
4 detailsOther
- 4am
- Medium shank; 26mm cup diameter; 6.72mm rim width; 7.38mm throat; Barrel backbore. Designed to fit Pre-1974 B&H and Willson instruments. Classic euphonium mouthpiece for an open sound with clear attacks and focused low register.
- 6bm
- Medium shank; 25.40mm cup diameter; 6.26mm rim width; 7.12mm throat; Medium backbore. Designed to fit Pre-1974 B&H and Willson instruments. True euphonium sound with clear high register and clean tone.
- 4ay
- USA small shank; 26mm cup diameter; 6.72mm rim width; 7.38mm throat; Large backbore. Designed for USA or Japanese instruments. Classic design as the 4AM version; Focused low register with open sound.
- 6by
- USA large shank; 25.40mm cup diameter; 6.26mm rim width; 7.12mm throat; Medium backbore. Nice tone with good high register.
