Bach numbering:   trained as an engineer in Germany; use English machinists measurements – drills 1-80 (large – small), plus letter names (A – H)

The smaller the number, the larger the diameter – range from 22 to 1 (10½C is the smallest you’ll likely find)

A – deepest cap – V shape – great for cornet
 –      2^nd deepest – V shape
B  – middle deep – V shape – theoretically for B-flat trumpet, but normally on C trumpet
C – middle shallow -cup shape – theoretically for C trumpet, but normally on B-flat trumpet
D – middle shallowest – D trumpet
E – shallowest – E-flat trumpet
F- extremely shallow – F trumpet – likely to bottom out with any pressure

Standard throat is 27
FL – flugel – much deeper and more V-shaped
W – wider rim to distribute pressure over more area

Megatone – same reamers but a bigger mouthpiece blank – costs a LOT more than it
     should
     play louder with less distortion, slots upper range better

Schilke – wanted to be the opposite of Bach

bigger number bigger mouthpiece – range from 6 to 24
Cup – A-E
     a= shallowest
     e= deepest
Rim Contour – 1-5
     1= curved, 5-flat
Backbore – a-e
     a=tight,e=open

more comfortable because of a more rounded bite – slurs better, doesn’t tongue as sharply

14C= 14C3c

Standard 26 Throat

Same as Yamaha because they hired Schilke to design the mouthpieces and trumpets