You may have heard about the trumpet mouthpiece comparator at https://trumpet.cloud/mpc/ which posts cross-section scans of trumpet mouthpieces for comparison sake.
The owner of the comparator is now adding tuba and trombone/euphonium mouthpieces. Now, it is of limited use, because we all know how much throat diameter and backbore lend to the actual tone of any particular mouthpiece. But it is interesting to see exactly how mouthpieces compare. The comparator has a goodly number of classic and popular mouthpieces already scanned. Don't be disappointed if you don't see your mouthpiece, because eventually and probably it will be scanned in later, as the owners are good about periodic updating. You can always pay to have your mouthpiece scanned, but I wait for others to do that.
For example, I was able to compare the classic Conn Helleberg and Bach 18 cup geometry to my Denis Wick Aaron Tindall AT3UY. Not much difference on screen, but major differences tonally.
Tuba Mouthpiece Comparator
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- iiipopes
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Tuba Mouthpiece Comparator
- These users thanked the author iiipopes for the post (total 2):
- 1 Ton Tommy (Tue May 05, 2026 10:12 am) • catgrowlB (Thu May 07, 2026 1:14 pm)
Jupiter JTU1110
"Real" Conn 36K
"Real" Conn 36K
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gocsick
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Re: Tuba Mouthpiece Comparator
Cool.. It looks like they just imported the models that already exist for free in VennCad.. but for quick comparisons it is faster than getting out the macbook to open it up.
As amateur as they come...I know just enough to be dangerous.
Meinl-Weston 20
Holton Medium Eb 3+1
Holton Collegiate Sousas in Eb and BBb
Conn 20J
and whole bunch of other "Stuff"
Meinl-Weston 20
Holton Medium Eb 3+1
Holton Collegiate Sousas in Eb and BBb
Conn 20J
and whole bunch of other "Stuff"
Re: Tuba Mouthpiece Comparator
Man, my eyes are showing their age! I read "Tuba Mouthpiece Compactor" and wondered what I'd missed in the time I've been away. 
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Heavy_Metal
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Re: Tuba Mouthpiece Comparator
@bloke , we'd love to see your MPs there..............
Principal tuba, Bel Air Community Band
Old (early 1900s?) Alexander BBb proto-163
1976 Sonora (B&S 101) 4-rotor BBb
~1904 York 3P BBb Helicon
Old Alex Comp.F, in shop
Old (early 1900s?) Alexander BBb proto-163
1976 Sonora (B&S 101) 4-rotor BBb
~1904 York 3P BBb Helicon
Old Alex Comp.F, in shop
- iiipopes
- Posts: 1319
- Joined: Thu Aug 13, 2020 4:26 pm
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Re: Tuba Mouthpiece Comparator
The scary thing is that there are many mouthpieces out there nobody would miss if that happened.smitwil1 wrote: Thu Apr 30, 2026 7:53 pm Man, my eyes are showing their age! I read "Tuba Mouthpiece Compactor" and wondered what I'd missed in the time I've been away.![]()
Jupiter JTU1110
"Real" Conn 36K
"Real" Conn 36K
-
Heavy_Metal
- Posts: 507
- Joined: Sat Aug 15, 2020 5:23 pm
- Location: Baltimore, MD, USA
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Re: Tuba Mouthpiece Comparator
@tclements ' Orchestra MP is on there. 
Principal tuba, Bel Air Community Band
Old (early 1900s?) Alexander BBb proto-163
1976 Sonora (B&S 101) 4-rotor BBb
~1904 York 3P BBb Helicon
Old Alex Comp.F, in shop
Old (early 1900s?) Alexander BBb proto-163
1976 Sonora (B&S 101) 4-rotor BBb
~1904 York 3P BBb Helicon
Old Alex Comp.F, in shop
