Jupiter XO 1240L-T Bass Trombone Overview
The XO 1240L-T is a professional bass trombone built for players who need a full independent-valve setup with a broad, centered bass trombone sound. The model sits in XO's professional trombone line and is designed around an open-wrap layout, a large bass trombone bore, a 9.5 inch bell, and XO's Thru-Flo (axial-flow) valve configuration, giving advanced players a serious option for orchestral, wind ensemble, studio, and low-brass section work. This instrument is finished in lacquer and offers the flexibility expected from a modern professional bass trombone.
Jupiter XO 1240L-T Bass Trombone Specifications
- Instrument Type: Professional bass trombone
- Key: Bb/F/Gb/D
- Finish: Gold lacquer
- Bore Size: .561 inch
- Bell Diameter: 9.5 inch
- Valve System: Dual independent Thru-Flo valves
- Case: XO Designer Series case
- Accessories: 2 extra leadpipes, polish cloth. No mouthpiece (takes large bore)
- Serial Number: BB01266
Condition & Setup
This open-box XO 1240L-T is in excellent playing order and has been professionally inspected, set up, and play-tested by The Mighty Quinn Brass and Winds. The finish is very clean overall, with light surface scratches and handling marks visible on the bell area. The fitted case and two extra leadpipes are included. A mouthpiece, valve oil, and slide cream are not included.
Who the 1240L-T Bass Trombone Is For
The 1240L-T is intended for advanced students, serious ensemble players, and professional bass trombonists who want an independent-valve instrument with modern response and flexible low-register facility. Its design is well suited to orchestral bass trombone parts, wind ensemble literature, brass ensemble playing, pit work, and commercial settings where clarity, valve efficiency, and a stable low register are important. Players comparing professional bass trombones should consider whether they prefer the feel and response concept of XO's Thru-Flo valve system.
Common Questions About the Jupiter XO 1240L-T
What distinguishes the XO 1240L-T from a standard double-rotor bass trombone?
The 1240L-T uses XO's Thru-Flo valve configuration rather than the standard rotor setup found on the 1240L. This design is intended for players who want efficient airflow through the valve section while retaining the breadth and stability expected from a professional bass trombone.
Is the 1240L-T appropriate for orchestral bass trombone work?
Yes. Its independent Bb/F/Gb/D configuration, bass trombone bore, and 9.5 inch bell place it in the professional bass trombone category used for orchestral, wind ensemble, and large-ensemble low-brass playing.
How should a player evaluate this model against other professional bass trombones?
Focus on valve feel, low-register response, slide action, intonation tendencies, and how the bell and bore match your tonal concept. The 1240L-T is a strong candidate for players who want a modern independent-valve bass trombone with a responsive valve-side feel.
We are proud to be an authorized Jupiter XO dealer
In stock! Ships within 1-2 business days.
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99
Jupiter XO 1240L-T Bass Trombone with Dual Independent Thru-Flo Valves
Jupiter XO 1240L-T Bass Trombone Overview
The XO 1240L-T is a professional bass trombone built for players who need a full independent-valve setup with a broad, centered bass trombone sound. The model sits in XO's professional trombone line and is designed around an open-wrap layout, a large bass trombone bore, a 9.5 inch bell, and XO's Thru-Flo (axial-flow) valve configuration, giving advanced players a serious option for orchestral, wind ensemble, studio, and low-brass section work. This instrument is finished in lacquer and offers the flexibility expected from a modern professional bass trombone.
Jupiter XO 1240L-T Bass Trombone Specifications
- Instrument Type: Professional bass trombone
- Key: Bb/F/Gb/D
- Finish: Gold lacquer
- Bore Size: .561 inch
- Bell Diameter: 9.5 inch
- Valve System: Dual independent Thru-Flo valves
- Case: XO Designer Series case
- Accessories: 2 extra leadpipes, polish cloth. No mouthpiece (takes large bore)
- Serial Number: BB01266
Condition & Setup
This open-box XO 1240L-T is in excellent playing order and has been professionally inspected, set up, and play-tested by The Mighty Quinn Brass and Winds. The finish is very clean overall, with light surface scratches and handling marks visible on the bell area. The fitted case and two extra leadpipes are included. A mouthpiece, valve oil, and slide cream are not included.
Who the 1240L-T Bass Trombone Is For
The 1240L-T is intended for advanced students, serious ensemble players, and professional bass trombonists who want an independent-valve instrument with modern response and flexible low-register facility. Its design is well suited to orchestral bass trombone parts, wind ensemble literature, brass ensemble playing, pit work, and commercial settings where clarity, valve efficiency, and a stable low register are important. Players comparing professional bass trombones should consider whether they prefer the feel and response concept of XO's Thru-Flo valve system.
Common Questions About the Jupiter XO 1240L-T
What distinguishes the XO 1240L-T from a standard double-rotor bass trombone?
The 1240L-T uses XO's Thru-Flo valve configuration rather than the standard rotor setup found on the 1240L. This design is intended for players who want efficient airflow through the valve section while retaining the breadth and stability expected from a professional bass trombone.
Is the 1240L-T appropriate for orchestral bass trombone work?
Yes. Its independent Bb/F/Gb/D configuration, bass trombone bore, and 9.5 inch bell place it in the professional bass trombone category used for orchestral, wind ensemble, and large-ensemble low-brass playing.
How should a player evaluate this model against other professional bass trombones?
Focus on valve feel, low-register response, slide action, intonation tendencies, and how the bell and bore match your tonal concept. The 1240L-T is a strong candidate for players who want a modern independent-valve bass trombone with a responsive valve-side feel.
We are proud to be an authorized Jupiter XO dealer
Pairs well with
In stock! Ships within 1-2 business days.
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99
Jupiter XO 1240L-T Bass Trombone with Dual Independent Thru-Flo Valves
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders valued over $99 ship via FedEx 2-Day within the U.S. and via DHL internationally. A physical address (no P.O. Boxes) and signature are required. Smaller accessories ship via USPS (2–5 day service) and do not require a signature if valued under $99. Please see our FAQ for additional details.
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Return Policy
We offer an unconditional 30-day return policy to ensure you’re completely satisfied. If you’re unhappy for any reason, return the item for a full refund or full exchange credit (reeds and other consumables are non-returnable once opened). Every instrument we sell is guaranteed to be free of mechanical defects—if an issue arises, contact us and we’ll either reimburse a local repair or provide a prepaid return label for repair, exchange, or refund. If you simply change your mind, you may still return the item for a full refund, but return shipping costs are the customer’s responsibility unless free returns were purchased through Redo at checkout. Please see our FAQ for additional details.
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Shop Warranty:
Brand new items are covered by the full manufacturer’s warranty unless otherwise noted (see the individual maker for details). Open box/refurbished, used, and vintage items include a two-year warranty serviced by our in-house repair shop, and we guarantee every instrument will be free of mechanical defects. Warranty coverage does not include damage from accident, misuse, negligence, improper operation, unauthorized alterations or removed serial numbers, normal wear and routine maintenance, environmental damage (including perspiration, corrosion, or extreme temperature and humidity), lacquer or plating wear, or consumable parts such as springs, pads, and felts. Please see our FAQ for additional details.