Conn vs Kelly Trombone Mouthpieces
Conn offers 19 trombone mouthpieces (made in United States), while Kelly has 17 models (made in United States). Below we compare both lineups side by side to help you choose the right brand for your playing style.
Conn
Models19
Avg cup—
Avg throat—
Common styleGeneral
CountryUnited States
vs
Kelly
Models17
Avg cup25.86mm
Avg throat—
Common styleBass
CountryUnited States
Conn vs Kelly — head-to-head comparisons
- Conn Connstellation 7CW vs Kelly JAZZ-LS-SS
- Conn Connstellation 7CW vs Kelly BASS-BONE-LS-SS
- Conn Connstellation 7CW vs Kelly BEAST-LS-SS
- Conn Connstellation 7CW vs Kelly 6-1/2AL-LS-SS
- Conn Precision 1 vs Kelly JAZZ-LS-SS
- Conn Precision 1 vs Kelly BASS-BONE-LS-SS
- Conn Precision 1 vs Kelly BEAST-LS-SS
- Conn Precision 1 vs Kelly 6-1/2AL-LS-SS
- Conn Precision 3A vs Kelly JAZZ-LS-SS
- Conn Precision 3A vs Kelly BASS-BONE-LS-SS
- Conn Precision 3A vs Kelly BEAST-LS-SS
- Conn Precision 3A vs Kelly 6-1/2AL-LS-SS
All models
Conn (19)
Connstellation 7CW
· — · General
Precision 1
· — · Orchestral
Precision 3A
· — · General
Connstellation 5BN
· V.Deep · General
Connstellation 7BN
· V.Deep · General
Connstellation 7CN
· — · General
Precision 3
· — · General
Connstellation 5CN
· — · General
Imp. Precision 3A
· — · General
Imp. Precision 5
· V.Deep · General
Precision 2
· Deep · Lead
Connstellation 9BN
· V.Deep · General
Imp. Precision 3
· — · General
Simone Mantia 10
· — · Orchestral
Imp. Precision 2
· Deep · Lead
Imp. Precision 4
· — · Orchestral
Precision 4
· — · Orchestral
Simone Mantia 11
· — · General
Imp. Precision 1
· — · Orchestral
Kelly (17)
JAZZ-LS-SS
25.65mm · — · Jazz
BASS-BONE-LS-SS
27.69mm · — · Bass
BEAST-LS-SS
28.70mm · — · Bass
6-1/2AL-LS-SS
25.15mm · V.Deep · General
12C
24.13mm · Shallow · Lead
5G-LS
25.40mm · — · Orchestral
6-1/2AL-SS
25.15mm · V.Deep · General
SKY-SS
24.64mm · Shallow · Lead
SYMPHONY-LS-SS
25.65mm · — · Orchestral
6-1/2AL
25.15mm · V.Deep · General
51D-LS-SS
25.40mm · — · Professional
5G
25.40mm · — · Orchestral
BASS-BONE
27.69mm · — · Bass
BASS-BONE-LS
27.69mm · — · Bass
51D
25.40mm · — · Professional
51D-LS
25.40mm · — · Professional
51D-SS
25.40mm · — · Professional
Frequently asked questions
Which brand makes better trombone mouthpieces — Conn or Kelly?
Neither brand is universally better. Conn has 19 models and Kelly has 17. 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 Conn and Kelly trombone mouthpieces compare in size?
Conn averages N/Amm cup diameter with N/Amm throat. Kelly averages 25.86mm cup diameter with N/Amm throat.