Modular Trumpet Mouthpiece Backbores
B10 Standard, used with C cup tops.
B117 Piccolo, used with E cup tops, favors the upper register.
B24 Bigger, darker, symphonic, used with A cup tops.
B25 Recommended for V cups.
B3 Dark sound.
B41 Bright, with resistance.
B57 Bright and lively.
B7 Dark Schmidt style, used with B cup tops.
B76 Bright and edgy sound—Commercial used with D and F cup tops.
B87 Big—very free blowing.
GIR1 Tightest of GIR Series.
GIR117 Piccolo trumpet.
GIR2 Smaller than GIR3.
GIR3 Standard.
GIR4 Darker and more free blowing than GIR3.
GIR5 Largest of GIR Series.
P Very tight.
PUR Replica of old Purveyance tight playing backbore.
R2 Similar to B10.
R69 Bright, focused sound.
R692 Combination of R69 and 69 more open than 69, great lead backbore.
RZR Very tight.
S72 Free blowing, good for upper register.
SA Tight and bright.
SB Straight, slightly more open.
SC Standard.
SD Darker and more free blowing than SC.
SE Large.
| Model | Throat Size | Part # | Price |
|---|---|---|---|
| B10 | #27 – .144″ | 40803 | $80.00 |
| B117 | #27 – .144″ | 40810 | $80.00 |
| B24 | #27 – .144″ | 40804 | $80.00 |
| B25 | #27 – .144″ | 40805 | $80.00 |
| B3 | #27 – .144″ | 40801 | $80.00 |
| B41 | #27 – .144″ | 40806 | $80.00 |
| B57 | #27 – .144″ | 40807 | $80.00 |
| B7 | #27 – .144″ | 40802 | $80.00 |
| B76 | #27 – .144″ | 40808 | $80.00 |
| B87 | #27 – .144″ | 40809 | $80.00 |
| GIR1 | #27 – .144″ | 40966 | $80.00 |
| GIR117 | #27 – .144″ | 40971 | $80.00 |
| GIR2 | #27 – .144″ | 40967 | $80.00 |
| GIR3 | #27 – .144″ | 40968 | $80.00 |
| GIR4 | #27 – .144″ | 40969 | $80.00 |
| GIR5 | #27 – .144″ | 40970 | $80.00 |
| P | #27 – .144″ | 40919 | $80.00 |
| PUR | #27 – .144″ | 40845 | $80.00 |
| R2 | #27 – .144″ | 40930 | $80.00 |
| R69 | #27 – .144″ | 40931 | $80.00 |
| R692 | #27 – .144″ | 40932 | $80.00 |
| RZR | #27 – .144″ | 40933 | $80.00 |
| S72 | #27 – .144″ | 40961 | $80.00 |
| SA | #27 – .144″ | 40926 | $80.00 |
| SB | #27 – .144″ | 40927 | $80.00 |
| SC | #27 – .144″ | 40928 | $80.00 |
| SD | #27 – .144″ | 40929 | $80.00 |
| SE | #27 – .144″ | 40842 | $80.00 |
Visual Mouthpiece Comparator
Access our Mouthpiece Comparator here.
Visual Backbore Comparator
Access our Backbore Comparator here.