Hawaiian Koa 4A Curly Concert Ukulele Top #CT-TOP-059
■ Product Description
Hawaiian Koa 4A Curly
Concert Ukulele Top Wood (Bookmatched)
Product Number: CT-TOP-059
This is a rare 4A [Mid-High] grade curly Hawaiian koa wood.
It features the beautiful gold to brown hues characteristic of Hawaiian koa and a curly grain that appears three-dimensional depending on the angle of the light.
This is a set of two bookmatched top wood pieces, carefully selected for concert ukulele construction.
It can be used as a top wood, as well as a back wood.
The wood is supplied directly from a supplier on the island of Hawaii and is part of a reforestation project.
■ Grade
4A [Mid-High] Curly
■ Scientific Name
Acacia koa
■ Set Contents
Top wood 2-piece set (bookmatched)
■ Size
Top (Bookmatched Top)
Approx. 300×230–265×3.3mm
(Length × Width × Thickness)
*The dimensions for the top wood are listed for its bookmatched (open book) state, not for a single piece.
*If two widths are listed, the wider one is for the bottom and the narrower one is for the top.
*Although listed as top wood, it can also be used as back wood.
■ Wood Information
Wood Type: Hawaiian Koa
Scientific Name: Acacia koa
Origin: Island of Hawaii, Hawaii State
■ Features
・Rare 4A [Mid-High] grade curly grain
・Concert ukulele top wood (bookmatched)
・Can be used for both top and back
・Beautiful natural gold to brown color
・Three-dimensional figured grain
・Direct from Hawaii Island, reforestation project wood
■ Recommended Uses
・Concert ukulele construction
・Ukulele top wood
・Ukulele back wood
・Acoustic instrument making
・High-end woodworking and craft production
This is a high-quality Hawaiian koa concert ukulele bookmatched top wood with a beautiful curly grain.
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: hawaiian koa
Usage: ukulele
Ukulele size: concert
Ukulele set: Top
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:
