Bach vs Kelly Baritone / Euphonium Mouthpieces
Bach offers 40 baritone / euphonium mouthpieces (made in United States), while Kelly has 4 models (made in United States). On average, Bach cups measure 24.74mm versus 25.40mm for Kelly. Below we compare both lineups side by side to help you choose the right brand for your playing style.
Bach
Models40
Avg cup24.74mm
Avg throat5.96mm
Common style—
CountryUnited States
vs
Kelly
Models4
Avg cup25.40mm
Avg throat—
Common styleGeneral
CountryUnited States
Bach vs Kelly — head-to-head comparisons
All models
Bach (40)
14½D
24.50mm · Shallow
17D
24.20mm · Shallow
8
24.75mm · Medium
5GB (small shank)
25.50mm · V.Deep
5
25.50mm · Medium
9
24.72mm · Deep
11C
24.70mm · Shallow
15
24.40mm · Deep
5G (small shank)
25.50mm · V.Deep
5GS (small shank)
25.50mm · Deep
6
25.50mm · Medium
6½A (small shank)
25.40mm · Deep
8½BW
24.75mm · Shallow
11
24.70mm · Deep
12
24.50mm · Deep
12C
24.50mm · Shallow
15EW
24.30mm · Shallow
17
24.20mm · Medium
17C
24.20mm · Shallow
3
26.26mm · Deep
Frequently asked questions
Which brand makes better baritone / euphonium mouthpieces — Bach or Kelly?
Neither brand is universally better. Bach has 40 models and Kelly has 4. 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 Bach and Kelly baritone / euphonium mouthpieces compare in size?
Bach averages 24.74mm cup diameter with 5.96mm throat. Kelly averages 25.40mm cup diameter with N/Amm throat.