How to read an acoustic guitar's tonewoods: what top, back and sides actually do

Now, I'll be straight with you — tonewoods are not exactly my usual territory. My world is groove, low-end, and making sure the bass locks in tight with the kick drum. But I've spent enough time around acoustic guitarists, and enough years in session rooms listening to what separates a guitar that sits in a mix from one that clutters it, to know this: tonewoods matter, and most buyers either ignore them completely or get lost in mysticism about them. Neither helps you pick the right guitar.

So let me break it down the way I'd break down any gear question — practically, from the bottom up.

The top (soundboard) does most of the work

If there's one piece of wood on an acoustic guitar that shapes its voice more than any other, it's the top — the soundboard. This is the face of the guitar, the piece that vibrates when you pluck a string and converts that energy into sound. Everything else on the guitar is, to a significant degree, responding to what the top sets in motion.

Sitka spruce is the industry default, and there's a very good reason for that. It has a wide dynamic range, meaning it responds differently to a gentle fingerpick than it does to a hard strum. If you want a guitar that rewards varying your attack — playing softer in the verse, digging in on the chorus — spruce gives you that headroom. It tends toward clarity and brightness.

Cedar is warmer and more responsive at lower playing volumes. It speaks up quickly with lighter touch, which is why fingerstyle players often gravitate toward it. The tradeoff is that it can compress a little earlier when you really dig in — it doesn't scale up dynamically the same way spruce does.

There are other tops — mahogany, koa, maple — but spruce and cedar cover the majority of what you'll encounter at most price points. If you're choosing your first acoustic, have a read of our best acoustic guitars for beginners guide — most of the guitars there use spruce tops, which tells you something about its versatility.

Back and sides: shaping the character

Here's where it gets interesting. The back and sides don't project sound outward the way the top does, but they shape how the sound reflects and resonates inside the body. Think of it like the walls of a room — they affect the character of what you hear even if they're not generating the sound directly.

Rosewood back and sides are associated with a scooped, hi-fi kind of sound — strong lows, sparkling highs, a slightly recessed midrange. It's a forgiving, wide-spectrum tone that tends to sit well in a mix without fighting for space.

Mahogany back and sides push the midrange forward. The sound is more focused, more immediate, woodier. It's particularly good for strumming and for styles where you want the guitar to cut through — blues, folk, country. A guitar like the Fender CD-60S (check price) uses mahogany back and sides, which gives it that direct, punchy quality.

Maple is bright and articulate, with tight lows and clear note separation. You'll hear it a lot in archtops and some flat-tops where note clarity is the priority over warmth.

Solid vs laminate: the practical question

Most of the tonewood conversation assumes solid wood construction, but at the more accessible end of the market you'll encounter laminate — thin layers of wood pressed together. Laminate tops especially are more resistant to humidity changes, which is a real practical advantage, but they don't vibrate quite the same way as solid wood and they don't open up and improve with age the way solid tops do.

A guitar like the Yamaha FG800 (check price) uses a solid spruce top with laminate back and sides — that's a smart compromise. You get most of the tonal benefit where it matters most (the top) while keeping the price and the durability practical. The Yamaha FS800 (check price) does the same in a smaller concert body. Both are solid starting points.

How body shape interacts with tonewoods

It's worth remembering that tonewoods don't work in isolation — the body shape affects how those tonal qualities are expressed. A dreadnought with mahogany back and sides will sound different from a parlour guitar with the same woods, because the air volume inside the body changes the whole acoustic picture. If you want to go deeper on that, our beginner acoustic guide touches on it, and there's a dedicated piece on body shapes elsewhere on the site.

What to actually listen for

When you're in a shop trying guitars, here's the simple version: play something you actually know, at the volume you actually play. Listen for whether the fundamental note of each chord is clear and present, or whether it gets muddy. A rosewood-backed guitar might give you more sparkle; a mahogany-backed one might feel more focused and direct. Neither is better in the abstract — it depends on your style and where that guitar needs to sit.

And if you can only play one thing to test a guitar, play it softly. How a guitar responds at low volume tells you a lot about its sensitivity. That's true whether you're a fingerstyle player, a strummer, or — like a lot of session players I know — someone who needs to do both in the same take.