Detail 01
.630 inch cup diameter
The smallest in this heavyweight lineup — over .07" narrower than the 20. Range comes easily, low register and volume do not.
Product detailSKU #1275776904025
SchilkeHeavyweight Series Trumpet Mouthpiece in Silver 6A4a Silver
Independent shopping perspective
The Korena take
Schilke 6A4a Heavyweight, silver-plated trumpet mouthpiece. Small .630" cup, shallow A cup, cushion #4 rim, tight 27 throat. Built for extreme high register.
Strong match
Who this is for
- Screamer lead parts sitting above the staff
- Players wanting the heavyweight blank's added mass and slotting
- Small-diameter specialists who need endurance up top
Consider the trade-offs
When to look elsewhere
- Anyone playing orchestral or legit repertoire needing a full low register
- Players with larger embouchures — .630" is very small
- Doubling one mouthpiece across all styles
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
Shallow A cup
Minimal cup volume brightens the tone sharply and puts the upper register within much easier reach.
Detail 03
Number 4 cushion rim
Wide, semi-flat bearing surface spreads mouthpiece pressure across more lip so you last through long high sets.
Detail 04
27 throat with tight a-backbore
High resistance. Gives you something to push against for high notes; feels stuffy at full volume in the low register.
Detail 05
Heavyweight profile
Extra brass mass around the cup. Firmer slots and a more focused core compared with the standard-weight version.
Detail 06
Silver plating
Standard finish with a slightly grippier feel on the lip than gold plate.
Final check
Know before you order
- 01Mouthpiece only — no case or pouch included
- 02Small shallow pieces shift intonation; expect to relearn slotting for a few weeks
- 03Heavier blank adds noticeable weight to the horn's balance in the hand
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How does the heavyweight differ from the standard 6A4a?
Same .630" cup diameter, shallow A cup, #4 cushion rim, and 27 throat. The heavyweight profile adds mass around the cup for firmer slotting and more focus.
02Is .630 too small for me?
It's the smallest diameter in this line. If your current mouthpiece is near .670 like a 14, the jump is large — the 13A4a or 14A4a heavyweight is a closer step.
03Can I use it for concert band or orchestra?
The shallow cup and small diameter thin out the low register and brighten the sound. The 15, 16C4, or 17 heavyweights suit all-around and larger-ensemble playing better.
04Will it fit any trumpet?
It uses a standard trumpet shank and fits standard trumpet receivers. It is not a cornet or flugelhorn mouthpiece.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Silver
11 detailsOther
- 16c4 Hvy
- 17.20mm, .677 inch cup diameter; 26 throat. Heavyweight Profile. Similar to the model 16 in dimensions, this mouthpiece offers a number 4 semi-flat rim for a more traditional feel and increased endurance.
- 17 Hvy
- 17.33mm, .682 inch cup diameter; 26 throat. Heavyweight Profile. A compromise of all the medium characteristics, this mouthpiece is an excellent medium to large diameter mouthpiece.
- 14a4a Hvy
- 17.09mm, .673 inch cup diameter; 27 throat. Heavyweight Profile. One of our most popular mouthpieces, the 14A4a offers a shallow A cup, semi-flat number 4 rim and tight a-backbore allows a player a strong upper register without sacrificing tonal production.
- 15a4a Hvy
- 17.14mm, .675 inch cup diameter; 27 throat. Heavyweight Profile. A larger diameter mouthpiece with a shallow A cup and tight a-backbore for upper register playing. Number 4 semi-flat rim offers comfort in upper register.
- 15 Hvy
- 17.12mm, .674 inch cup diameter; 26 throat. Heavyweight Profile. An excellent all-around mouthpiece which offers a free blowing, clear sound.
- 13 Hvy
- 16.89mm, .665 inch cup diameter; 26 throat. Heavyweight Profile. Ideal choice for a student or developing player with standard number 3 rim contour. Rounder rim provides increased flexibility and quick response. C cup offers volume for tone.
- 14 Hvy
- 17.02mm, .670 inch cup diameter; 26 throat. Heavyweight Profile. With a standard rim, cup and backbore, the model 14 is an excellent choice for all around playing.
- 20 Hvy
- 17.78mm, .700 inch cup diameter; 26 throat. Heavyweight Profile. This large diameter is for the robust embouchure. Original mouthpiece of choice for Renold O. Schilke.
- 13a4a Hvy
- 16.76mm, .660 inch cup diameter; 27 throat. Heavyweight Profile. The shallow A cup, semi-flat number 4 rim and tight a-backbore creates an ideal lead mouthpiece.
- 18 Hvy
- 17.52mm, .690 inch cup diameter; 26 throat. Heavyweight Profile. The high point being nearer to the center makes this mouthpiece feel smaller than it is. The standard characteristics produce a rich, brilliant tone.
- 6a4a Hvy
- 15.99mm, .630 inch cup diameter; 27 throat. Heavyweight Profile. A shallow A cup with cushion number 4 rim for extreme high register work.
