TubeNet

Belltrouble wrote:Just being curious............

What makes the difference in some listings (Tilz,Klier and so on) between an mp for an F/Eb tuba and a mp suitable for CC/ BB tuba?

Disregarding the shank dimensions perhaps..................

Inner diameters are similar,often,as the backbore diameters are,on the larger F7Eb mp´s

Input please!!

Kurt

It's usually the depth and volume of the cup.

Rick "based on examples" Denney

With the PT series, it's more the diameter of the throat and the treatment of the backbore. When I tried out the entire series last year, everything in my preferred cup diameter, all the mouthpieces that were blurbed as being more for bass tuba had a smaller throat, @ 8 mm rather than the larger 8.2 - 8.4 throats for mouthpieces blurbed as being for contrabass tubas.

And it showed in the playing. The smaller throat mouthpieces did sound great on bass tuba, but at least for me, they all went flat in the upper register on a contrabass.

Belltrouble wrote:Just being curious............

What makes the difference in some listings (Tilz,Klier and so on) between an mp for an F/Eb tuba and a mp suitable for CC/ BB tuba?

Disregarding the shank dimensions perhaps..................

Inner diameters are similar,often,as the backbore diameters are,on the larger F7Eb mp´s

Input please!!

Kurt

The opinion of the manufacturer/marketer.

jonesbrass wrote:

Belltrouble wrote:Just being curious............

What makes the difference in some listings (Tilz,Klier and so on) between an mp for an F/Eb tuba and a mp suitable for CC/ BB tuba?

Disregarding the shank dimensions perhaps..................

Inner diameters are similar,often,as the backbore diameters are,on the larger F7Eb mp´s

Input please!!

Kurt

The opinion of the manufacturer/marketer.

Yes! What SIZE Eb/F CC/BBb? Bore? What accoustical tendancies does it have? In what size group? Playing what sort of music? et al...

I don't really understand the difference myself. I use a Conn Helleberg for my CC and for my school's F, and I've never had problems with the F.

What I usually tend to find is that the F/Eb mouthpieces are shallower. This will help keep the pitch from going flat in the high register. Yes, you can play a helleberg on an F tuba, but you may be working harder pushing the pitch up without realizing it.

I personally find that a shallow bowl mouthpiece (rather than a funnel one) will help ME keep the pitch where it belongs so I don't have to work too hard. Jens Bjorn-Larsen used to use a full sized Conn Helleberg on all his horns. He has been using a PT65 on his F but is currently having a custom, signature mouthpiece made. He found that, yes he could do it on the Helleberg, but it was an awful lot of work. Now it is a lot easier on him and he can put more energy into making the music.

Just my observations.

Roger

I make specific shanks for Eb & F tubas, and BBb & CC tubas (are those the correct designations?).

I won't discuss what the differences are, but it takes care of the flat high range on Eb & F tubas.