Commercial Trumpet Backbores

Commercial Trumpet Backbores

  • $95.00
    Unit price per 


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. Great for latin and commercial playing!

KT* Backbore - With all the characteristics of the above, the KT* is modified in the venturi to offer a little more open blow, which allows for a more Broadway-style lead trumpet sound!

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.

Highly efficient - The player's buzz is amplified to a vibrant sound, even in the mid and low registers. This makes it possible for lead players to remain authoritative in these registers without having to overly-loosen their chops. This pays off big in the endurance department.

Resistance - similar to our #4 backbore, but the increased quantity of sound requires less physical drive to sustain dominance. An entirely new reamer was created to make the Q backbore so more specific comparisons aren't possible.

Slightly lower pitch center - The Q is .050" longer in length overall than our standard backbores. This added a unique type of resistance resulting in firmer "walls" around the slots. If you are playing at extreme volumes, this type of security can make the difference between a guarded performance and a boldly dynamic one. Most players who use the Q have found that their tuning slides can come in as much as a quarter inch, resulting in a more consistent timbre and better intonation.

Commercial sound - the Q was designed for verve and projection.

Why the funny name? - The designation "Q" was used during its development as a working name because the letter Q was not used in any other product that we make. Later, we learned that the "Q" factor is used by pollsters to describe someone's immediate likeability. If someone has a high Q factor, most people like them upon their first encounter. Serendipitously, this is precisely what happened with this backbore, so we kept the name!

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.


H Backbore - ​The​ ​"H" backbore fits squarely into the commercial category ​as it seems to perform best with a fast moving airstream associated with shallow cups. Featuring ​a longer blank with reverse taper in the venturi, the ​"H" is preferred by strong lead players who are able to convert the high resistance into an efficient and focused buzz. The benefit is that the "H" projects the full spectrum of their sound rather than just making the highs more piercing.​

H Backbore ​Specs:
Length overall - 2.85"
Bore - 27 at interface, 28 at -215"
Comparative resistance - Warburton 4
"I find the H backbore to be more efficient for me than the NY. For longer, harder gigs, I'm able to back off and my endurance is increased. The H provides great projection. The H also works great with my 5MW on picc."
Jon Yates, Air Force Band

"I keep going back to the H because it makes me sound like a more seasoned player."
Brian Anderson, Ringling Bros Circus

J29 Backbore - The J29's reverse-taper "hourglass" design produces an intensely focused sound. It prints exceptionally well on the mic in live performances and in the studio. The bore is 27 at the interface to match a standard top, but shrinks to #29 at the "waist." High PSI is required for this backbore.

TJ Backbore - For the commercial-style player who is used to putting more air through the horn, the new TJ backbore is the perfect balance of power and support! Played by the lead trumpet for Marc Anthony, and other professional players, we're getting great feedback:

"This backbore opened my sound in all registers and still maintained acoustical feedback. It's amazing how it does this. You get the best of both worlds. Bigger sound without falling into the cup - a really great feel"
Bill Carmichael, Universal Studios, Orlando Transit Authority

PT Backbore - With the introduction of a new reamer design, this backbore helps to create the old-style Symphonic Trumpet sound that can project over the orchestra without becoming too bright or strident. Resistance falls between the 8 & 9 backbores. The scope of the PT backbore is not as wide as the Warburton star series, which may pay off at the end of long passages.

We offer three styles of trumpet backbores:

Our standard shank series is designated as "C" and is only stamped with the model number or letter. Most players will be most comfortable with the "Standard Series"

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.

The "D" Series - They are exactly like the STANDARD and STAR series internally. The only difference is in the external dimension which is slightly smaller and causes a subsequent decrease in the GAP. This smaller diameter can create a more functional gap distance for players who feel like their horn plays stuffy, or who need a little more flexibility in the slotting. 

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.