Classification system
Piston trumpet
Junction 1
You can screw rim with its junction number 1
Possible combinations
Junction | Cup | Throat | Backbore | Gap |
---|---|---|---|---|
1 | B | a | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | B | b | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | B | c | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | B | d | L – XL | 1 – 2 – 3 – 4 |
1 | C | a | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | C | b | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | C | c | S – M – L – XL | 1 – 2 – 3 – 4 |
1 | C | d | L – XL | 1 – 2 – 3 – 4 |
1 | D | a | L – XL | 1 – 2 – 3 – 4 |
1 | D | b | L – XL | 1 – 2 – 3 – 4 |
Fori
a = 3.70 mm
b = 3.75 mm
c = 3.80 mm
d = 3.85 mm
Backbore
S: Medium backbore. Compact and brilliant tone.
M: Medium-large backbore. Compared to S backbore is more open in the initial part. Fuller sound.
L: Large backbore. Big symphonic sound of great volume and projection.
XL: Extra-large backbore. Large sound of enormous volume. Intonation-wise it helps with small trumpets (D, E-flat, E, F).
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Junction 2
You can screw rim with its junction number 2
Junction | Cup | Throat | Backbore | GAP |
---|---|---|---|---|
2 | B | a | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | B | b | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | B | c | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | B | d | L – XL | 1 – 2 – 3 – 4 |
2 | C | a | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | C | b | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | C | c | S – M – L – XL | 1 – 2 – 3 – 4 |
2 | C | d | L – XL | 1 – 2 – 3 – 4 |
2 | D | aa | L – XL – XXL | 1 – 2 – 3 – 4 |
2 | D | a | L – XL – XXL | 1 – 2 – 3 – 4 |
2 | E | aa | XL – XXL | 1 – 2 – 3 – 4 |
2 | E | a | XL – XXL | 1 – 2 – 3 – 4 |
Fori
aa = 3.65 mm
a = 3.70 mm
b = 3.75 mm
c = 3.80 mm
d = 3.85 mm
Penne (retroforo)
S: Medium backbore. Compact and brilliant tone.
M: Medium-large backbore. Compared to S backbore is more open in the initial part. Fuller sound.
L: Large backbore. Big symphonic sound of great volume and projection.
XL: Extra-large backbore. Large sound of enormous volume. Intonation-wise it helps with small trumpets (D, E-flat, E, F).
XXL: extra-extra-large backbore. Suitable for piccolo trumpet. Easier upper range.
Cup

B Cup (in green):
Deep cup with a dark and full-bodied tone.
C Cup (in black):
Medium cup with a compact tone all over the range.
D Cup (in brown):
Medium-shallow cup, brilliant but still compact tone.
E Cup (in pink):
Shallow cup, brillant and sparky tone. Well-suited for piccolo trumpet.
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Junction 3
You can screw rim with its junction number 3.
Raccordo | Tazza | Foro | Penna | Gap |
---|---|---|---|---|
3 | D | aa | L – XL – XXL | 1 – 2 – 3 – 4 |
3 | D | a | L – XL – XXL | 1 – 2 – 3 – 4 |
3 | E | aa | XL – XXL | 1 – 2 – 3 – 4 |
3 | E | a | XL – XXL | 1 – 2 – 3 – 4 |
3 | F | aa | XXL | 1 – 2 – 3 – 4 |
3 | F | a | XXL | 1 – 2 – 3 – 4 |
Throat
aa = 3.65 mm
a = 3.70 mm
Backbore
L: Large backbore. Big symphonic sound of great volume and projection.
XL: Extra-large backbore. Large sound of enormous volume. Intonation-wise it helps with small trumpets (D, E-flat, E, F).
XXL: extra-extra-large backbore. Suitable for piccolo trumpet. Easier upper range.
P – Piccolo trumpet with cornet shank
The cups’ design is the same of the piston trumpet’s ones.
Junction | Tazza | Foro | Penna | Gap |
---|---|---|---|---|
2 | PD | aa – a | XXL | 1 – 2 – 3 – 4 |
2 | PE | aa – a | XXL | 1 – 2 – 3 – 4 |
3 | PD | aa – a | XXL | 1 – 2 – 3 – 4 |
3 | PE | aa – a | XXL | 1 – 2 – 3 – 4 |
3 | PF | aa – a | XXL | 1 – 2 – 3 – 4 |
Fori
aa = 3.65 mm
a = 3.70 mm
Backbore
XXL: extra-extra-large backbore. Suitable for piccolo trumpet. Easier upper range.
R – Rotary trumpet
You can screw rim with its junction number 1.
The cups’ and backbores’ design does not match the piston trumpet’s ones.
Junction | Cup | Throat | Backbore | Gap |
---|---|---|---|---|
1 | RA | c – d – e | L – XL – XXL | 2 – 3 – 4 |
1 | RB | c – d – e | L – XL – XXL | 2 – 3 – 4 |
1 | RC | c – d – e | L – XL – XXL | 2 – 3 – 4 |
Throat
c = 3.80 mm
d = 3.85 mm
e = 3.90 mm
Backbore
L: Smallest backbore available for rotary trumpet. Compact and brilliant tone.
XL: Simphonic sound of great volume.
XXL: Very big and deep sound.
K – Cornet
You can screw rim with its junction number 1 or 2.
The cups’ design does not match the piston and rotary trumpet’s ones.
Junction | Cup | Throat |
---|---|---|
1 – 2 | KB | q – u |
1 – 2 | KC | g – m – q – u |
1 – 2 | KD | g – m – q – u |
1 | KE | g |
Throat
g = 4.00 mm
m = 4.20 mm
q = 4.40 mm
u = 4.60 mm
All throat measures
aa = 3.65mm
a = 3.7 mm
b = 3.75 mm
c = 3.80 mm
d = 3.85 mm
e = 3.90 mm
g = 4.00 mm
m = 4.20 mm
q = 4.40 mm
u = 4.60 mm
All backbores
For Piston trumpet
S: Medium backbore. Compact and brilliant tone.
M: Medium-large backbore. Compared to S backbore is more open in the initial part. Fuller sound.
L: Large backbore. Big symphonic sound of great volume and projection.
XL: Extra-large backbore. Large sound of enormous volume. Intonation-wise it helps with small trumpets (D, E-flat, E, F).
XXL: extra-extra-large backbore. Suitable for piccolo trumpet. Easier upper range.
For rotary trumpet
L: Smallest backbore available for rotary trumpet. Compact and brilliant tone.
XL: Simphonic sound of great volume.
XXL: Very big and deep sound.
For piccolo
XXL: extra-extra-large backbore. Suitable for piccolo trumpet. Easier upper range.
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Underpart SONICA for piston trumpet€80.00
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Underpart R – Rotary trumpet€80.00
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Underpart P – Piccolo€80.00
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Underpart K – Cornet€80.00