Detail 01
USA small shank
This is the fit spec that matters most. A medium-shank piece will not seat correctly in a small-shank receiver.
Product detailSKU #1274228081240
Denis WickDW5880E Classic Series Euphonium Mouthpiece - Silver, 4AY
Independent shopping perspective
The Korena take
Large-bore euphonium mouthpiece in the 4 size, cut with a USA small shank. For players on American or Japanese horns who want a big, open low register.
Strong match
Who this is for
- Players on USA or Japanese euphoniums with small-shank receivers
- Low-register work where you want an open, unrestricted sound
- Moving up from a smaller cup for more air and volume
Consider the trade-offs
When to look elsewhere
- Pre-1974 B&H or Willson horns — those take the medium-shank 4AM
- Players wanting a tighter, more focused high register
- Anyone chasing a compact sound; the large backbore opens it up
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
26mm cup diameter
Wide for a euphonium piece. More lip inside the rim means more volume and low range, but it asks for more endurance.
Detail 03
7.38mm throat
Larger than the 6-series throats. Air moves more freely, so the sound stays open at loud dynamics instead of clamping down.
Detail 04
Large backbore
Spreads the sound out. The 4AM uses a barrel backbore with the same cup and throat and stays slightly more contained.
Detail 05
6.72mm rim width
Broad rim. It spreads pressure over more lip, which helps comfort on long sessions but slightly dulls quick flexibility.
Detail 06
Silver finish
Standard brass-mouthpiece finish. Wipes clean easily; it will show wear on the rim over years of playing.
Final check
Know before you order
- 01Check your receiver: small shank only, not the medium-shank 4AM version
- 02Mouthpiece only — no pouch, brush, or case included
- 03A 26mm cup takes adjustment time if you're coming off a 6-size
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What's the difference between the 4AY and the 4AM?
Same 26mm cup, 6.72mm rim and 7.38mm throat. The 4AY is a USA small shank with a large backbore; the 4AM is a medium shank with a barrel backbore.
02Will this fit a Willson euphonium?
No. Willson and pre-1974 B&H instruments take the medium-shank versions, such as the 4AM. The 4AY is cut for USA and Japanese instruments.
03Is the 4AY too big for a student?
It's a large-cup piece. A student with limited endurance will usually get steadier results on a smaller 6-size before moving up to a 4.
04Which is better for high notes, the 4AY or a 6?
The 6 sizes are the ones described for a clear high register. The 4AY trades some of that for a focused low register and a more open overall sound.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Silver, 4AY
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.
