Willson K56S Euphonium Overview
The Willson K56S K-Series is an advanced level Bb euphonium built around the familiar three-top-valve and side-fourth-valve compensating layout. Positioned between Willson's non-compensating K46 and the company's higher-priced Q Series and Swiss Pro instruments, the K56S offers an established configuration for brass band, wind ensemble, solo, and chamber performance.
Willson K56S Euphonium Specifications
- Key: Bb
- Valve System: Four-valve compensating system with three top-action pistons and one side piston
- Bore Size: 0.590 inch (15 mm)
- Bell Diameter: 11.5 inches (290 mm)
- Bell Material: Yellow brass
- Finish: Silver plate
- Case: Willson padded gig bag
- Accessories: Laskey 59D large-shank mouthpiece, Ultra-Pure Professional Valve Oil, polish cloth
- Serial Number: K10142
Condition & Setup
This lightly used instrument is in excellent playing order and has been professionally serviced, set up, and play-tested. It is in very good overall cosmetic condition, with minor scratches on the bell and near the main tuning slide, including a localized area of scratching and scuffing on a vertical tube. The silver-plated surfaces otherwise present evenly across the instrument.
Who the K56S Euphonium Is For
The K56S is suited to advanced students, experienced ensemble musicians, and professional players seeking a traditional 3+1 compensating euphonium with a large-shank receiver. Its configuration supports the centered, full euphonium concept commonly required in brass bands and wind ensembles while remaining appropriate for solo, chamber, and teaching work.
Common Questions About the Willson K56S
How does the K56 differ from the Willson K46?
The K56 adds a compensating system and uses a larger 0.590-inch bore. The K46 uses a 0.571-inch bore and does not include the K56's compensating system, giving the two models different design goals within the K Series.
What does the compensating system contribute?
A compensating system routes additional tubing into the low register when the fourth valve is used with other valves. This helps address the naturally sharp tendencies of combined valve positions and supports more secure low-register intonation.
What mouthpieces fit the K56S?
The K56S uses a large-shank mouthpiece receiver. This instrument includes a Laskey 59D large-shank mouthpiece, while the receiver also accommodates other standard large-shank euphonium mouthpieces.
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 Intermediate Compensating Euphonium in Silver Plate SN K10142
Willson K56S Euphonium Overview
The Willson K56S K-Series is an advanced level Bb euphonium built around the familiar three-top-valve and side-fourth-valve compensating layout. Positioned between Willson's non-compensating K46 and the company's higher-priced Q Series and Swiss Pro instruments, the K56S offers an established configuration for brass band, wind ensemble, solo, and chamber performance.
Willson K56S Euphonium Specifications
- Key: Bb
- Valve System: Four-valve compensating system with three top-action pistons and one side piston
- Bore Size: 0.590 inch (15 mm)
- Bell Diameter: 11.5 inches (290 mm)
- Bell Material: Yellow brass
- Finish: Silver plate
- Case: Willson padded gig bag
- Accessories: Laskey 59D large-shank mouthpiece, Ultra-Pure Professional Valve Oil, polish cloth
- Serial Number: K10142
Condition & Setup
This lightly used instrument is in excellent playing order and has been professionally serviced, set up, and play-tested. It is in very good overall cosmetic condition, with minor scratches on the bell and near the main tuning slide, including a localized area of scratching and scuffing on a vertical tube. The silver-plated surfaces otherwise present evenly across the instrument.
Who the K56S Euphonium Is For
The K56S is suited to advanced students, experienced ensemble musicians, and professional players seeking a traditional 3+1 compensating euphonium with a large-shank receiver. Its configuration supports the centered, full euphonium concept commonly required in brass bands and wind ensembles while remaining appropriate for solo, chamber, and teaching work.
Common Questions About the Willson K56S
How does the K56 differ from the Willson K46?
The K56 adds a compensating system and uses a larger 0.590-inch bore. The K46 uses a 0.571-inch bore and does not include the K56's compensating system, giving the two models different design goals within the K Series.
What does the compensating system contribute?
A compensating system routes additional tubing into the low register when the fourth valve is used with other valves. This helps address the naturally sharp tendencies of combined valve positions and supports more secure low-register intonation.
What mouthpieces fit the K56S?
The K56S uses a large-shank mouthpiece receiver. This instrument includes a Laskey 59D large-shank mouthpiece, while the receiver also accommodates other standard large-shank euphonium mouthpieces.
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 Intermediate Compensating Euphonium in Silver Plate SN K10142
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.