Kelly vs Marcinkiewicz Trombone Mouthpieces
Kelly offers 17 trombone mouthpieces (made in United States), while Marcinkiewicz has 75 models (made in United States). On average, Kelly cups measure 25.86mm versus 26.20mm for Marcinkiewicz. Below we compare both lineups side by side to help you choose the right brand for your playing style.
Kelly
Models17
Avg cup25.86mm
Avg throat—
Common styleBass
CountryUnited States
vs
Marcinkiewicz
Models75
Avg cup26.20mm
Avg throat6.60mm
Common style—
CountryUnited States
Kelly vs Marcinkiewicz — head-to-head comparisons
- Kelly BEAST-LS-SS vs Marcinkiewicz ET3C. Loper
- Kelly BEAST-LS-SS vs Marcinkiewicz 11
- Kelly BEAST-LS-SS vs Marcinkiewicz 6E-S (Standard (Bass))
- Kelly BEAST-LS-SS vs Marcinkiewicz 8H-S
- Kelly BASS-BONE-LS-SS vs Marcinkiewicz ET3C. Loper
- Kelly BASS-BONE-LS-SS vs Marcinkiewicz 11
- Kelly BASS-BONE-LS-SS vs Marcinkiewicz 6E-S (Standard (Bass))
- Kelly BASS-BONE-LS-SS vs Marcinkiewicz 8H-S
- Kelly JAZZ-LS-SS vs Marcinkiewicz ET3C. Loper
- Kelly JAZZ-LS-SS vs Marcinkiewicz 11
- Kelly JAZZ-LS-SS vs Marcinkiewicz 6E-S (Standard (Bass))
- Kelly JAZZ-LS-SS vs Marcinkiewicz 8H-S
All models
Kelly (17)
BEAST-LS-SS
28.70mm · — · Bass
BASS-BONE-LS-SS
27.69mm · — · Bass
JAZZ-LS-SS
25.65mm · — · Jazz
12C
24.13mm · Shallow · Lead
5G-LS
25.40mm · — · Orchestral
6-1/2AL-LS-SS
25.15mm · V.Deep · General
SKY-SS
24.64mm · Shallow · Lead
SYMPHONY-LS-SS
25.65mm · — · Orchestral
6-1/2AL-SS
25.15mm · V.Deep · General
51D-LS-SS
25.40mm · — · Professional
5G
25.40mm · — · Orchestral
6-1/2AL
25.15mm · V.Deep · General
BASS-BONE
27.69mm · — · Bass
51D
25.40mm · — · Professional
51D-LS
25.40mm · — · Professional
51D-SS
25.40mm · — · Professional
BASS-BONE-LS
27.69mm · — · Bass
Marcinkiewicz (75)
ET3C. Loper
25.10mm · Deep
11
25.40mm · Deep
6E-S (Standard (Bass))
25.78mm · Medium
8H-S
26.06mm · Shallow
11C
25.37mm · Deep
7C
25.12mm · Deep
8H BS/ 6.5 AL
26.06mm · Medium
11 BS
25.37mm · Deep
12-S
25.10mm · Deep
5G-S
25.55mm · V.Shallow
5GWG. Woll
25.55mm · V.Shallow
8
25.93mm · Medium
9
26.06mm · Medium
9 BS
26.06mm · Medium
10 BS
25.40mm · Deep
12 BS
25.10mm · Deep
5F
25.78mm · V.Shallow
5F BS
25.78mm · Shallow
5F-S
25.78mm · V.Shallow
5G
25.55mm · V.Shallow
Frequently asked questions
Which brand makes better trombone mouthpieces — Kelly or Marcinkiewicz?
Neither brand is universally better. Kelly has 17 models and Marcinkiewicz has 75. The best choice depends on your playing style, preferred cup depth, and tonal goals. Compare specific models head-to-head to find the right fit.
How do Kelly and Marcinkiewicz trombone mouthpieces compare in size?
Kelly averages 25.86mm cup diameter with N/Amm throat. Marcinkiewicz averages 26.20mm cup diameter with 6.60mm throat.