Detail 01
.547-inch bore
Large bore. Broader, darker sound with more air required. Standard for orchestral and section work, not for lead playing.
Product detailSKU #1274034481351
XO1236L-O Professional Series F-Attachment Trombone 1236L-O Lacquer - Standard Valve and Yellow Brass Bell
Independent shopping perspective
The Korena take
Professional .547 large-bore F-attachment trombone with open wrap and three interchangeable leadpipes. For orchestral, big band, and advanced players wanting a customizable setup.
Strong match
Who this is for
- Orchestral and big band players needing low-register range below E
- Advancing players stepping up from a student straight tenor
- Players who want to tune response by swapping leadpipes
Consider the trade-offs
When to look elsewhere
- Beginners — .547 bore demands developed air support
- Players who need light weight for marching
- Anyone wanting a small-bore lead trombone for commercial work
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
Open wrap F-attachment
Fewer tight bends than a traditional wrap, so the horn feels freer when the trigger is engaged.
Detail 03
Three interchangeable leadpipes
Change resistance and response without changing horns. One horn covers a range of playing situations.
Detail 04
Gold-plated rotor
The valve surface is gold-plated, which resists corrosion. Rotor still needs regular oiling to stay quick.
Detail 05
Yellow brass 8.5-inch two-piece bell
Yellow brass gives brighter projection than rose brass. Two-piece construction is hand-formed rather than spun from one sheet.
Detail 06
Large mouthpiece shank
Small-shank mouthpieces won't fit. Your existing small-bore mouthpiece from a student horn will not work here.
Final check
Know before you order
- 01Case and mouthpiece are included; a large-shank mouthpiece is required for this horn
- 02Try all three leadpipes before settling — response differs noticeably between them
- 03Lacquer finish wears at hand contact points over years of playing
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What does the F-attachment do?
The trigger routes air through extra tubing, dropping the horn to F. It fills the low-range gap below E and gives alternate slide positions for smoother passages.
02Can I use my student trombone mouthpiece?
No, if it's a small shank. This horn takes a large shank. Small-shank mouthpieces won't seat properly.
03Is open wrap better than closed wrap?
Open wrap has fewer tight bends, so the horn typically feels less resistant with the trigger engaged. Closed wrap is more compact and better protected.
04Why three leadpipes?
Each changes how the horn responds and how much resistance you feel. You keep the one that suits your playing, or swap by setting.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
7 detailsBody & build
- Color
- Standard Valve and Yellow Brass Bell
- Type
- Trombone
- Bell Material
- Yellow or rose brass
- Leadpipe Material
- yellow brass and Sterling silver
- Handslide Material
- Yellow brass outer and chromed inner slides
- Body Finish
- Lacquer
- Finish
- Lacquer
1 detailsSize & weight
- Handslide Weight
- Standard
1 detailsIn the box
- Case or Gig Bag
- Included
10 detailsOther
- Tuning
- Bb/F
- Level
- Professional
- Mouthpiece
- Included
- Handslide Crook
- Nickel-silver
- Bell
- 8.5-inch hand crafted two-piece
- Bore
- .547-inch
- Mouthpiece Shank
- Large
- F Attachment Valve
- Gold-plated rotor
- F Attachment Wrap
- Open wrap
- Leadpipe
- Three interchangeable leadpipes with nickel-silver receiver
