Hawaiian Koa 4A Curly Soprano Ukulele Top, Back Side 6-Piece Set #KOA-SP-TBS-091
■ Product Description
Hawaiian Koa 4A Curly
Soprano Ukulele Top, Back & Side 6-Piece Set
Item Number: KOA-SP-TBS-091
Rare Curly Figure and Sapwood Contrast
This exceptional Hawaiian Koa set features beautiful curly figure combined with a distinctive band of light-colored sapwood running through the center.
Unlike typical Curly Koa, the bright central sapwood creates a striking natural contrast against the surrounding rich, darker heartwood.
This unusual combination of curly figure and contrasting sapwood makes the set particularly rare, highlighting the unique beauty of a one-of-a-kind piece created by nature.
Although graded 4A (High-Mid Grade), this premium set offers exceptional character and distinctive visual appeal that set it apart from typical 4A Hawaiian Koa.
An excellent choice for luthiers looking to create a truly unique and visually striking ukulele.
■ Grade
4A (High-Mid Grade) Curly
■ Scientific Name
Acacia koa
■ Set Contents
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2 Top pieces (Bookmatched)
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2 Back pieces (Bookmatched)
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2 Side pieces
Total: 6 Pieces
■ Size
Bookmatched Top
Approx. 270 × 155–280 × 2.3 mm
Bookmatched Back
Approx. 270 × 155–280 × 2.4 mm
Side
Approx. 375 × 65–75 × 2.2 mm
(Length × Width × Thickness)
The Top and Back dimensions are measured with the bookmatched pieces opened and laid flat. These are not the dimensions of a single piece.
The widths vary depending on the section of the wood. Please confirm that the available dimensions are suitable for your instrument design before purchasing.
■ Wood Information
Species: Hawaiian Koa
Scientific Name: Acacia koa
Origin: Hawaii Island, State of Hawaii, USA
■ Features
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4A (High-Mid Grade) Curly Hawaiian Koa
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Complete 6-piece Top, Back & Side set for Soprano Ukulele construction
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Bookmatched Top and Back
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Attractive natural curly figure that changes with the viewing angle and light
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Beautiful natural golden-to-brown coloration
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Suitable for Soprano Ukulele and custom acoustic instrument making
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Hawaiian Koa sourced from Hawaii Island
■ Recommended Uses
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Soprano Ukulele construction
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Custom ukulele building
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Ukulele Top
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Ukulele Back
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Ukulele Sides
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Acoustic instrument making
A beautiful 4A Curly Hawaiian Koa 6-piece set for Soprano Ukulele construction, featuring attractive natural curly figure and warm golden-to-brown coloration for a distinctive custom instrument.
KOA
What Is Hawaiian Koa?
Why Is Everyone So Fascinated by Koa?
What Is Koa?
Hawaiian Koa (Acacia koa) is a remarkable wood that has been treasured by the people of Hawaii for centuries.
Traditionally used for outrigger canoes, paddles, boxes, and furniture, Koa is now highly valued worldwide as a premium tonewood for ukuleles and guitars.
It is known for its rich, warm tonal character and distinctive natural beauty.
The Rarity of Hawaiian Koa
Hawaiian Koa is a tree species native to Hawaii, with a naturally limited geographic range and a finite supply of harvestable timber.
Historical logging and changes in land use have affected Koa forests. High-quality lumber displaying exceptional curly figure is particularly rare and highly sought after.
Today, forest conservation and reforestation initiatives are helping support the future of this valuable Hawaiian resource.
Our Koa Grading System
Our grading system is based on decades of experience in the wood industry. We evaluate Hawaiian Koa primarily by the strength, depth, and visibility of its curly figure, providing a consistent reference to help customers compare and select lumber.
Little or no curl,
with subtle figuring
Moderate curl
visible at certain angles
Prominent curl
visible from most angles
Deep, strong,
highly defined curl
Exceptionally rare,
outstanding curly figure
Note: These grades are based on our own grading standards. As Koa is a natural material, color, grain patterns, and the appearance of curl may vary depending on the individual piece and lighting conditions.
Moisture Content & Drying
Some of our lumber comes from naturally fallen trees or logs that have been drying for extended periods after harvesting. Moisture content varies from piece to piece. Some lumber may be ready for processing, while other pieces may require additional drying or acclimatization.
Careful drying and gradual moisture adjustment help minimize the risk of checking, cracking, and warping.
Stack Properly
Use stickers between boards to allow air to circulate freely.
Ensure Ventilation
Avoid direct sunlight and sudden changes in temperature or humidity.
Circulate Air
Use fans when necessary to maintain gentle and consistent airflow.
Minimize Warping
Stack lumber carefully and use appropriate weights when needed.
Recommended Uses
With its beautiful grain and excellent versatility, Hawaiian Koa is suitable for a wide range of applications, from fine musical instruments to decorative woodworking and handcrafted accessories.
Ukulele & Guitar Making
Knife & Tool Handles
Pens, Small Crafts & Inlays
Boxes & Fine Woodworking
Dimensions & Tolerances
Because wood is a natural material, actual dimensions may vary slightly. The following measurement tolerances may apply depending on the product.
| Thickness | ±0.2 mm |
|---|---|
| Length | ±5 cm |
| Width | ±3 mm |
Natural lumber may not be perfectly square or uniformly shaped. Please allow for the natural characteristics of wood. Dimensions and conditions specified on individual product pages take precedence.
Detailed information
Tree species: ハワイアンコア
Usage: ウクレレ
Ukulele size: ソプラノ
Ukulele set: トップ、バック、サイド
Guitar size:
Guitar set:
Guitar grade:
Color:
Format:
Striped pattern:
Dimensions of top thickness:
Top width:
Top length:
Back thickness:
Back width:
Back length:
Side thickness:
Side width:
Site length:
