Commercial Trumpet Backbores
Front Row (Backbores):
Trumpet -- Cornet -- British Cornet -- Series 80 Cornet -- Series 80 Trumpet
Back Row (Tops):
Anchor Grip -- Trumpet/Cornet -- British Cornet
KT Backbore - Added to the line in mid 1987, this backbore appeals to commercial/lead players and is characterized by its projection and secure slotting of notes above high C. The comparative resistance falls in the 4, 5, 6 series.
Q Backbore - New in 2004, the Q is our most aggressive backbore, preferred by lead players who also need to maintain dominance in the middle register without spreading or over-loosening their chops. More info on the Q backbore...
Qm Backbore - New in 2008, the Qm is a slight modification to the Q backbore. A modified taper in the venturi section slightly compresses the air column to increase velocity before releasing the air into the main body of the backbore. The result - An exciting commercial sound with an intense center.
NY Backbore - This backbore was inspired by the sound of the old Giardinelli #3 (default) backbore made popular by Maynard and others in the '70's. The New York sound was broad, bright, and acoustically loud - which are also the qualities of this backbore. Resistance is just a bit tighter than our #5.
We offer three styles of trumpet backbores:
The STANDARD Series - Our standard series models have long established themselves as the most popular choice for nearly any playing situation.
The STAR Series - These were designed to allow each of the STANDARD models to be more free blowing without the necessity of reaming to a larger bore size. This is important because the quality of sound remains the same without the risk of losing focus sometimes caused by playing of too large bore size. Since these models were made available, the medium large sizes (7* to 10*) have been very well received in the orchestral trumpet community.
The "B" Series - They are exactly like the STANDARD and STAR series internally. The only difference is in the external dimension which is slightly larger and causes a subsequent increase in the GAP. This added diameter can re-establish a functional gap distance in trumpets with worn receivers and where the mouthpiece receiver has been soldered to the lead pipe improperly.
While we recommend the use of our STANDARD series for most situations, if there is a noticeable problem with "LOCKING-IN" of the upper partials, the "B" backbore will very often rectify the problem.
Our standard shank size is designated as "C" and is only stamped with the model number or letter. We also offer "A" through "E" shank size variations, and those will be stamped with the shank size letter before the model number or letter. The different size shanks vary as listed below:
- "A" is 0.010 inch larger than "C" (increases the GAP by 0.2 inches)
- "B" is 0.005 inch larger than "C" and is most often used to correct the typical gap problems as described here. (increases the GAP by 0.1 inches)
- "C" is the standard size shank which properly fits most horns.
- "D" is 0.005 inch smaller than "C" (decreases the GAP by 0.1 inches)
- "E" is 0.010 inch smaller than "C" (decreases the GAP by 0.2 inches)
It should be noted that sizes "A", "D", and "E" are made to order. If your horn needs one of these sizes, it may indicate that something else is wrong with the horn, such as an extremely worn receiver.