Xo 1240Rl-T Bass Trombone With Red Brass Bell - Clear Lacquer

Unit Price
US$ 7,521.32
US$ 9,234.00
US$ 7,521.32
US$ 9,234.00
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Manufacturer part number
Dual Independent Thayer
Outer slide
Yellow Brass
Inner slide
Leadpipe material
Yellow Brass (260mm, 220mm), Sterling Silver (220mm)
3 x Interchangeable
Bell material
Rose Brass
Case/gig bag
Hardshell Case
Clear Lacquer
Additional features
Nickel Silver Crook
Bb with F/Gb/D attachment

This article was Written By

Our Product Research Team

Flexibility for Any Ensemble

Built for the professional player, the XO 1240RL bass trombone offers the perfect amalgamation of traditional tone and contemporary playability. The 1240RL is equipped with both F and Gb attachments and comes with dual independent rotors, which give you a fully chromatic range of low tones. The rotor channels feature gold plating for easy maintenance. You’ll love the warm response of the 9.5-inch rose brass bell and the centered sound of the 0.561-inch symphonic bore. What’s more, this trombone includes three interchangeable leadpipes that allow the player to customize the feel and response of the horn. If you’re looking for a horn that can hold its own in any ensemble, Sweetwater Sales Engineers highly recommend the XO 1240RL bass trombone.

Related Videos: 1240RL-T Bass Trombone with Red Brass Bell - Clear LacquerThru-Flo axial flow valve for a truly “open” sound

The trombone’s unmistakable sound is a direct result of arrow-straight airflow and cylindrical tubing. And as much as a trombone’s valve opens the door for extra-low playing, it can also color your tone in undesirable ways. That’s where the Thru-Flo valve design comes in. XO’s take on the well-loved axial flow valve, the Thru-Flo valve eliminates the sharp bends found in traditional rotor valves for straighter airflow and less resistance than ever before. Trombone players at Sweetwater report that Thru-Flo valves provide a free-blowing feel that you have to experience to believe.

Expressive rose brass bell

The XO 1240RL ships with a responsive rose brass bell. Measuring in at expansive 9.5 inches, this bell delivers a warm and expressive sound through all registers. Thanks to its higher copper content, rose brass produces a rich tonal quality that improves upon the classic sound of yellow brass. You’ll appreciate the authoritative projection for louder dynamics and the nuanced response for quieter articulations. Courtesy of its rose brass bell, the XO 1240RL will provide the right tone for any occasion.

Dual independent attachments

A bass trombone’s attachments are integral to the horn’s sound. XO knows this, which is why they pulled out all the stops to produce responsive attachments to enhance your low end. This professional bass trombone comes equipped with independent F and Gb attachments, giving you a chromatic range of low tones that standard dependent systems cannot match. And since each rotor is independent, you get greater playing flexibility for technical passages. What’s more, XO includes gold-plated rotary channels to ensure upkeep a breeze.

Customize your playing experience with interchangeable leadpipes

XO is committed to delivering the best possible playing experience with each of their instruments. A trombone should feel like a perfectly natural extension of yourself, and breath resistance plays a major role in achieving that “perfect” feeling. The 1240RL comes with three interchangeable leadpipes, so you can customize the horn to fit your unique tonal needs. In addition, XO included a removable gold-plated counterweight to further customize the feel of your 1240RL trombone.

XO brass meets the mark for today’s top players

The XO brand was born out of the vision of Koichi Haido, chief instrument technician at the Global Corporation in Japan. Designed for today’s top players, XO brass instruments leverage the industry’s leading performance options. The company's specially tailored features enhance the experience of the performer with incredible sound, clarity, and resonance at all volumes, in all venues, and under any performance demand you may encounter. Each XO instrument is inspected for quality throughout the manufacturing process, ensuring that it can endure bumps and bruises as easily as it can navigate challenging technical passages. Sweetwater strives to meet the demands of our pro-level customers, and XO instruments meet the mark.

XO 1240RL Professional Bass Trombone Features:
  • Top-notch professional bass trombone
  • Dual independent attachments allow for a greater range of low tones
  • Open-wrap configuration lessens resistance
  • 0.561-inch bore delivers a free-blowing feel and centered timbre
  • 9.5-inch, 2-piece rose brass bell offers up a warm, rich tone
  • Expertly fit yellow brass outer slide responds to your slightest touch
  • Interchangeable leadpipes allow you to customize the horn’s response
  • Thru-Flo axial flow valves effectively eliminate wind resistance
  • Gold-plated valve channel makes upkeep a breeze
  • Lacquer finish adds a warm quality to the tone
  • Includes hardshell case and mouthpiece
Shipping from
This product is shipped from our supplier's warehouse in Fort Wayne, IN, United States
Our guarantee
This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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