Detail 01
Axial flow F attachment
The valve routes air on a straighter path than a traditional rotor, so the trigger register feels more open and less stuffy.
Product detailSKU #1306875720920
Bach42AF Stradivarius Series Axial Flow F-Attachment Trombone 42AF Lacquer Yellow Brass Bell
Independent shopping perspective
The Korena take
A professional Stradivarius F-attachment trombone with an axial flow valve and lacquered yellow brass bell. For advancing and working players who live in the trigger register.
Strong match
Who this is for
- Orchestral and large-ensemble players needing the low register daily
- College and conservatory students on a professional horn
- Players moving up from a straight or rotor-valve trombone
Consider the trade-offs
When to look elsewhere
- Beginners — the price and the F attachment are both a lot to manage
- Marching and pep band, where finish and valve take abuse
- Lead jazz players who want a light, bright small-bore horn
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
F attachment at all
Adds the notes below E and gives you alternate slide positions, which shortens awkward long shifts in fast passages.
Detail 03
Yellow brass bell
The standard reference voice — even and clear, with more projection and edge than a red brass or nickel bell.
Detail 04
Lacquer finish
Protects the brass from hand acids and slightly smooths the response versus a raw or silver-plated horn.
Detail 05
Stradivarius series
Bach's professional tier, so parts, slides and service are widely supported by repair techs.
Final check
Know before you order
- 01Mouthpiece choice matters here — budget for one that suits your setup
- 02The axial valve needs regular oiling and a tech who knows the design
- 03Try it before committing at this price; horn and player have to match
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What does the F attachment actually do?
Pressing the trigger opens extra tubing that drops the horn into F. That fills in the low notes below E and gives you alternate positions higher up.
02How is axial flow different from a regular rotor?
The axial flow valve turns the air less sharply than a conventional rotary valve, so many players find the trigger side blows more freely and matches the open horn better.
03Is this too much horn for a high schooler?
It's a professional instrument. A strong advancing student will grow into it, but it's more horn and more money than most school programs require.
04Does the lacquer wear off?
Lacquer wears where your hands and body contact the horn over years of playing. It's cosmetic, and it can be relacquered by a tech.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Yellow
