

S.E. Shires STBBSCA Custom Bass Trombone Overview
The S.E. Shires STBBSCA Custom Bass Trombone (Custom BII 7YM) is a professional bass trombone built around a 9.5 inch hand-hammered yellow-brass bell, a .562-inch handslide, and independent F and G flat axial-flow valves. This configuration is designed to deliver a clear, centered core with broad projection, quick response, and an open low register, while maintaining consistent playability and balance across dynamics.
S.E. Shires STBBSCA Custom Bass Trombone Specifications
- Instrument: Bass Trombone
- Model: STBBSCA Custom (Custom BII 7YM)
- Bell: 9.5 inch, two-piece, hand-hammered BII taper, medium weight yellow brass; traditionally brazed seam; soldered bead
- Valves: Independent S.E. Shires F/G flat axial-flow valves
- Tuning Slide: BYB “B” taper, drawn yellow brass
- Handslide: B62, .562-inch bore; standard weight yellow brass; nickel-silver crook
- Leadpipes: Three interchangeable yellow-brass leadpipes
- Finish: Lacquer
- Engraving: S.E. Shires maker’s mark with traditional floral pattern
- Case: S.E. Shires bass trombone case
- Accessories: Mouthpiece and care kit
Condition & Setup
Brand new with full manufacturer's warranty. This instrument has been professionally serviced, set up, and play-tested to confirm proper slide action, valve alignment, and overall performance.
Who the STBBSCA Custom Bass Trombone Is For
The S.E. Shires STBBSCA Custom Bass Trombone is a professional-level bass trombone designed for players who need a flexible orchestral and commercial instrument with independent axial-flow valves and a strong, open low register. The BII 7YM bell is engineered to combine the quick response and tonal color associated with a one-piece bell feel with the centered feedback and expansive sound often associated with a two-piece bell design.
The BII taper in medium weight yellow brass supports a broad, rich sound that stays balanced from soft to loud playing, making it suitable for demanding ensemble work where clarity, blend, and projection all matter. The independent F and G flat axial-flow valve section is intended to feel even and open, particularly when using both valves, for secure response in extended low-range passages.
Common Questions About The S.E. Shires STBBSCA
What makes the BII 7YM bell different from other bass trombone bells?
The BII 7YM bell is a 9.5 inch, two-piece, hand-hammered yellow-brass bell with a BII taper that is intended to combine fast response and tonal color with a centered feel and an expansive sound.
Are the valves independent, and what are they tuned to?
Yes. The STBBSCA uses independent S.E. Shires axial-flow valves in F and G flat, giving access to standard bass trombone valve combinations and an open-feeling low register when both valves are engaged.
What comes included with the S.E. Shires STBBSCA Custom?
It includes an S.E. Shires bass trombone case, a mouthpiece, and a care kit, along with three interchangeable yellow-brass leadpipes.
We are proud to be an authorized S.E. Shires 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
S.E. Shires STBBSCA Custom Bass Trombone
S.E. Shires STBBSCA Custom Bass Trombone Overview
The S.E. Shires STBBSCA Custom Bass Trombone (Custom BII 7YM) is a professional bass trombone built around a 9.5 inch hand-hammered yellow-brass bell, a .562-inch handslide, and independent F and G flat axial-flow valves. This configuration is designed to deliver a clear, centered core with broad projection, quick response, and an open low register, while maintaining consistent playability and balance across dynamics.
S.E. Shires STBBSCA Custom Bass Trombone Specifications
- Instrument: Bass Trombone
- Model: STBBSCA Custom (Custom BII 7YM)
- Bell: 9.5 inch, two-piece, hand-hammered BII taper, medium weight yellow brass; traditionally brazed seam; soldered bead
- Valves: Independent S.E. Shires F/G flat axial-flow valves
- Tuning Slide: BYB “B” taper, drawn yellow brass
- Handslide: B62, .562-inch bore; standard weight yellow brass; nickel-silver crook
- Leadpipes: Three interchangeable yellow-brass leadpipes
- Finish: Lacquer
- Engraving: S.E. Shires maker’s mark with traditional floral pattern
- Case: S.E. Shires bass trombone case
- Accessories: Mouthpiece and care kit
Condition & Setup
Brand new with full manufacturer's warranty. This instrument has been professionally serviced, set up, and play-tested to confirm proper slide action, valve alignment, and overall performance.
Who the STBBSCA Custom Bass Trombone Is For
The S.E. Shires STBBSCA Custom Bass Trombone is a professional-level bass trombone designed for players who need a flexible orchestral and commercial instrument with independent axial-flow valves and a strong, open low register. The BII 7YM bell is engineered to combine the quick response and tonal color associated with a one-piece bell feel with the centered feedback and expansive sound often associated with a two-piece bell design.
The BII taper in medium weight yellow brass supports a broad, rich sound that stays balanced from soft to loud playing, making it suitable for demanding ensemble work where clarity, blend, and projection all matter. The independent F and G flat axial-flow valve section is intended to feel even and open, particularly when using both valves, for secure response in extended low-range passages.
Common Questions About The S.E. Shires STBBSCA
What makes the BII 7YM bell different from other bass trombone bells?
The BII 7YM bell is a 9.5 inch, two-piece, hand-hammered yellow-brass bell with a BII taper that is intended to combine fast response and tonal color with a centered feel and an expansive sound.
Are the valves independent, and what are they tuned to?
Yes. The STBBSCA uses independent S.E. Shires axial-flow valves in F and G flat, giving access to standard bass trombone valve combinations and an open-feeling low register when both valves are engaged.
What comes included with the S.E. Shires STBBSCA Custom?
It includes an S.E. Shires bass trombone case, a mouthpiece, and a care kit, along with three interchangeable yellow-brass leadpipes.
We are proud to be an authorized S.E. Shires 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

S.E. Shires STBBSCA Custom Bass Trombone
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.

