[Trombone-l] Mouthopieces

[Dr Dennis L. Clason]

The 6.5AL is a deeper mouthpiece than the 7C, inside rim diameters are 
close to the same.  The throat and backbore on the 6.5AL are 
considerably bigger than on the 7C.  I don't find that the 6.5AL works 
well for me on horns smaller than a King 3B.  The 6.5A has Bach's 
standard tenor throat and backbore with the same cup and rim as the 
6.5AL.  It's a better match for me on small horns.

The legend I heard was that Vincent Bach designed the 6.5 AL for Glenn 
Dodson, who used it on a Conn 78H.  If true, it explains why the thing 
works so well on medium to medium-large horns.

Basically, if you're happy with the 7C I'd forget about all this stuff.

Dennis