Willson K56S Euphonium Overview
The Willson K56S is a Swiss-made Bb euphonium that combines a 3+1 compensating valve system with a large-shank receiver and the substantial proportions expected of a full-size ensemble instrument. Willson has an established reputation among euphonium players, and the K56S offers the compensating low-register facility associated with serious brass band, concert band, and solo repertoire.
Willson K56S Euphonium Specifications
- Key: Bb
- Valve System: 3 top-action stainless steel pistons, 1 side piston, compensating
- Bore Size: .590 inch, 15 mm
- Bell Diameter: 11.5 inches, 290 mm
- Bell Material: Yellow brass
- Finish: Silver plate
- Case: Fitted black Willson hard case
- Accessories: Laskey 59D mouthpiece, Ultra-Pure valve oil, tuning-slide lubricant, black protective accessory pouch
- Serial Number: K10247
Condition & Setup
This lightly used instrument is in excellent playing order and has been professionally serviced, set up, and play-tested. The silver-plated exterior remains bright overall, with minor fine scratches and handling marks. A localized impact deformation and finish disturbance are present at the lower bell rim, and the valve-button felts show light discoloration from use. These cosmetic observations do not prevent the instrument from serving as a fully prepared playing instrument.
Who the K56S Euphonium Is For
The K56S is suited to euphonium players who want a full-size Bb instrument with traditional 3+1 ergonomics, a large-shank mouthpiece receiver, and a compensating system for greater chromatic facility in the low register. Its .590-inch bore and 11.5-inch bell make it a practical choice for brass band, concert band, solo, and ensemble musicians seeking a substantial yet familiar compensating design.
Common Questions About the Willson K56S
What does the compensating system contribute?
The compensating system redirects air through additional tubing when the fourth valve is used with the first three valves. This improves the practicality and intonation of low-register valve combinations while extending the instrument's chromatic range.
How does the K56 differ from the Willson K46?
The K56 uses a compensating system and a .590-inch bore. The K46 is a noncompensating design with a smaller .571-inch bore, giving the two models different low-register capabilities and response concepts.
What does the large-shank receiver mean for the player?
A large-shank receiver accepts standard large-shank euphonium mouthpieces, giving experienced players access to a broad selection of cup, rim, and throat designs for refining response and tonal character.
We are proud to be an authorized Willson dealer
In stock! Ships within 1-2 business days
Financing available. Apply directly at checkout
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99
Willson K56S K-Series Bb 4-Valve Compensating Euphonium in Silver Plate
Willson K56S Euphonium Overview
The Willson K56S is a Swiss-made Bb euphonium that combines a 3+1 compensating valve system with a large-shank receiver and the substantial proportions expected of a full-size ensemble instrument. Willson has an established reputation among euphonium players, and the K56S offers the compensating low-register facility associated with serious brass band, concert band, and solo repertoire.
Willson K56S Euphonium Specifications
- Key: Bb
- Valve System: 3 top-action stainless steel pistons, 1 side piston, compensating
- Bore Size: .590 inch, 15 mm
- Bell Diameter: 11.5 inches, 290 mm
- Bell Material: Yellow brass
- Finish: Silver plate
- Case: Fitted black Willson hard case
- Accessories: Laskey 59D mouthpiece, Ultra-Pure valve oil, tuning-slide lubricant, black protective accessory pouch
- Serial Number: K10247
Condition & Setup
This lightly used instrument is in excellent playing order and has been professionally serviced, set up, and play-tested. The silver-plated exterior remains bright overall, with minor fine scratches and handling marks. A localized impact deformation and finish disturbance are present at the lower bell rim, and the valve-button felts show light discoloration from use. These cosmetic observations do not prevent the instrument from serving as a fully prepared playing instrument.
Who the K56S Euphonium Is For
The K56S is suited to euphonium players who want a full-size Bb instrument with traditional 3+1 ergonomics, a large-shank mouthpiece receiver, and a compensating system for greater chromatic facility in the low register. Its .590-inch bore and 11.5-inch bell make it a practical choice for brass band, concert band, solo, and ensemble musicians seeking a substantial yet familiar compensating design.
Common Questions About the Willson K56S
What does the compensating system contribute?
The compensating system redirects air through additional tubing when the fourth valve is used with the first three valves. This improves the practicality and intonation of low-register valve combinations while extending the instrument's chromatic range.
How does the K56 differ from the Willson K46?
The K56 uses a compensating system and a .590-inch bore. The K46 is a noncompensating design with a smaller .571-inch bore, giving the two models different low-register capabilities and response concepts.
What does the large-shank receiver mean for the player?
A large-shank receiver accepts standard large-shank euphonium mouthpieces, giving experienced players access to a broad selection of cup, rim, and throat designs for refining response and tonal character.
We are proud to be an authorized Willson dealer
Pairs well with
In stock! Ships within 1-2 business days
Financing available. Apply directly at checkout
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99
Willson K56S K-Series Bb 4-Valve Compensating Euphonium in Silver Plate
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.