Ask any classical guitarist why one instrument sounds different from another and sooner or later the conversation turns to wood. The species used for the top, the back and sides, and the fingerboard all leave their mark on the final sound, and the finish applied over the wood adds another layer to the story. This page walks through the materials most often found in classical guitars and what each one tends to contribute.
Spruce vs cedar: the two main top woods
The top, or soundboard, is generally considered the single most influential part of a classical guitar's construction. Spruce and cedar dominate as choices, and they behave quite differently. A spruce top tends to produce a bright, clearly defined sound with strong separation between notes, but it is often described as needing time to "open up": a brand new spruce top can sound a little reserved, and its tone tends to bloom and gain complexity after months or years of regular playing. Cedar, by contrast, usually delivers a warmer, rounder tone and tends to sound fuller right away, without the long break in period associated with spruce. Neither wood is objectively superior, the right choice depends largely on personal taste and how a player wants the instrument to feel and respond from day one.
Rosewood for the back and sides
The back and sides of a classical guitar are usually cut from a denser, harder wood than the top, chosen partly to reflect sound back through the soundboard. Rosewood has long been one of the most common and most respected choices for this role. Indian rosewood is the most widely available variety and offers fairly consistent properties from piece to piece. Madagascar rosewood is less common and often shows more visual variation in its grain. Brazilian rosewood holds a special place in the history of guitar making and was long considered the finest tonewood available, though international conservation rules have made it increasingly difficult to source in recent decades. The back and sides mainly shape tonal fullness and projection, even though the top remains the dominant factor in how a note is actually produced.
Ebony for the fingerboard
The fingerboard takes constant contact from the player's fingers, so builders look for an extremely hard, dense wood that resists wear over decades of use. Ebony is the standard choice for classical guitar fingerboards, prized for its smooth surface and its ability to hold up to years of pressure and friction without developing grooves or dips. Its deep black color has also become a recognizable visual signature on many handmade instruments. Some makers use other dense hardwoods for the fingerboard, but ebony remains the default across most of the classical guitar world.
Shellac and modern lacquers
The finish applied to a guitar protects the wood from moisture and handling, but it also has an audible effect on the instrument. Shellac is the traditional finish used on handmade classical guitars for generations. It can be applied in extremely thin coats, which lets the top vibrate with very little added mass, and many players feel that a shellac finished guitar sounds particularly open and alive. The tradeoff is that shellac scratches and marks easily and reacts poorly to humidity, so it demands more careful handling over the life of the instrument. Polyurethane is the modern alternative, forming a noticeably tougher and more scratch resistant surface. A polyurethane finish holds up far better to everyday wear and changing humidity, though some players feel that its thicker, harder coating can slightly dampen the top's natural vibration compared to a thin shellac finish. In practice, the choice between the two usually comes down to weighing long term durability against a preference for maximum tonal openness.
Where to go next
To see how these materials come together during actual construction, visit our page on guitar construction. Once an instrument has been chosen, proper upkeep matters just as much as the materials themselves, so take a look at our guide to guitar care for advice on storage and humidity.
