Acoustic guitar tonewoods for the body: back and sides explained

Most of the tonewood conversation in acoustic guitar shops centres on the top — and fair enough, the soundboard does the heavy lifting. But after spending a lot of time in session rooms playing alongside acoustic guitarists, I've noticed that the back and sides are where the character really lives. Two guitars with identical spruce tops can feel and sound completely different from each other depending on what's behind them.

I'm a bass player, not an acoustic fingerpicker, so take my perspective for what it is: someone who cares obsessively about how the fundamental sits in a mix, and who's watched players grab one mahogany-bodied dreadnought after another when they need a sound that pokes through without overpowering the rhythm section.

What back and sides actually do

The top generates most of the volume and initial tone. The back and sides reflect and colour that sound as it bounces around inside the body before exiting through the soundhole. Think of the back as a wall — a hard, bright wall throws sound back fast and punchy, while a softer, more porous wall absorbs and softens it.

Different species affect sustain, the balance between low-end warmth and high-end sparkle, and how quickly transients decay. None of this is dramatic in isolation, but side by side on a good recording, the differences are real.

Mahogany: the workhorse

If I had to pick one back-and-sides wood that makes sense for players who want their acoustic to sit in a mix without fighting everything else, mahogany is it. It's midrange-forward, slightly dry in character, and doesn't bloom with as much overtone complexity as rosewood. That sounds like a limitation written down, but in practice it means notes articulate cleanly and the guitar tracks your dynamics honestly.

A lot of entry-to-mid level instruments use nato or sapele as mahogany substitutes — both are tonally similar enough that the distinction rarely matters at that price point. The Yamaha FG800 (check price) uses nato back and sides and is a textbook example of how well this can work: punchy, balanced, no mud. The Fender CD-60S (check price) uses laminate mahogany and still captures some of that directness.

Rosewood: the classic

Indian rosewood is what most players picture when they think "acoustic guitar tone." It's rich, complex and has a noticeable scooped quality — lows and highs both get a lift, with a slightly recessed midrange. The result is an open, singing sound with long sustain and a lot of overtone activity.

For solo fingerpicking, a rosewood-backed guitar is hard to beat. For strumming in a dense arrangement, that complexity can occasionally work against you — it takes up more sonic space. Brazilian rosewood is now subject to strict CITES Appendix I trade restrictions, which is why Indian rosewood dominates the market. Worth knowing if you're considering a vintage instrument with Brazilian back and sides, because the paperwork required to transport it internationally is genuinely complicated.

If you're looking at beginner-oriented acoustics that use rosewood (or ovangkol, which is a frequent substitute), our best acoustic guitars for beginners guide walks through some solid options at that level.

Maple: bright, focused, a bit of a character piece

Maple back and sides cut through. They're bright, with a tight low end and pronounced clarity on the attack. There's less warmth than mahogany, less complexity than rosewood. I'd argue maple gets a bit unfairly overlooked — it's genuinely great for players who pick hard, want definition on every note, and need to cut through a band without needing a pickup.

Archtop jazz guitars have used maple forever, and the transient response is a big reason why. On a flat-top acoustic, maple gives you something more percussive and immediate. Taylor uses figured maple on various models, and it's become almost its own sound: clean, modern, articulate.

Koa and walnut: the alternatives worth considering

Hawaiian koa sits somewhere between mahogany and rosewood tonally — warmer than maple, more complex than mahogany, without quite the full bloom of rosewood. It also looks extraordinary, which isn't a tone characteristic but it does affect how much the guitar costs.

Walnut has come up a lot in recent years as a rosewood alternative since tightening timber regulations have pushed builders toward it. Tonally it leans toward mahogany — warm, midrange-focused — but with a bit more brightness on the top end. The Taylor GS Mini Mahogany (check price) actually uses layered sapele, not walnut, but it's a good reference point for how a warmer-voiced, compact body can still produce a surprisingly full low-end.

Laminate vs solid back and sides

This matters more than the species debate for a lot of buyers. Solid wood back and sides will open up over time — the wood becomes more resonant with play, and the guitar you have in five years sounds different (better, usually) than the one you bought. Laminate back and sides don't change that way. They're more stable in fluctuating humidity, harder to crack, and often cheaper to manufacture.

At the budget end, laminate is a practical choice. But if you're spending north of $500 AUD on an acoustic, I'd push hard for solid back and sides if you can get them. The long-term payoff is real.

Humidity still matters either way — laminate is more forgiving but not immune. If you haven't read our guide on caring for an acoustic guitar through humidity and seasonal changes, that's worth a look before you store or travel with any acoustic.

How to use this when you're shopping

The wood doesn't exist in isolation. A mahogany body with a cedar top is a very different thing to a mahogany body with an adirondack spruce top. Body shape matters too — a parlour guitar with rosewood back and sides won't sound the same as a dreadnought with the same tonewoods, because the internal air volume is completely different. Our existing breakdown of acoustic body shapes and how they affect tone is a good companion read here.

When you're in a shop, try to compare guitars that share the same body shape and top wood but differ in back and sides. That's the only way to actually hear what the back material is contributing. And play the thing the way you'll actually play it — not harder and more carefully than usual, the way everyone plays in shops.

Back and sides are a real tonal variable, not marketing fluff. But they're not magic either. A great setup and a well-voiced top will outperform a beautifully grained back on a poorly built instrument every single time.

— Sheildon, Bass & Low-End Editor