The Complete Guide to Acoustic Guitars

Anatomy of an Acoustic Guitar

An acoustic guitar has three main sections: the headstock (where the tuning machines sit), the neck (the long fretted section you grip), and the body (the large resonating chamber). The body is where the magic happens.

The soundboard (or top) is the most acoustically important piece of wood on the instrument. It vibrates in response to the strings, amplifying their energy. Beneath it, a system of bracing — thin strips of wood glued in patterns like X-bracing or scalloped bracing — controls how the top flexes and resonates. The back and sides reflect sound back through the soundhole, shaping volume and projection.

The saddle sits on the bridge and transfers string vibration directly into the soundboard. A well-cut saddle made from bone or TUSQ transmits energy more efficiently than cheap plastic, which is why a simple saddle upgrade is one of the most cost-effective tone improvements you can make.

From String Vibration to Sound Projection

When you pluck or strum a string, it vibrates at a specific frequency determined by its length, tension, and mass. That vibration transfers through the saddle and bridge into the soundboard, which acts like a speaker cone — pushing air in and out of the body through the soundhole.

The shape and volume of the body cavity determine how much air moves and which frequencies are emphasised. A large dreadnought body moves more air than a small parlour body, producing greater volume and stronger bass response. But size isn't everything: the bracing pattern determines how freely the soundboard can vibrate. Scalloped bracing removes material from the brace peaks, letting the top flex more and producing a more responsive, dynamic sound.

This is why two guitars made from the same wood can sound completely different. Construction technique matters as much as material selection.

Dreadnought — The All-Rounder

The dreadnought is the most popular acoustic guitar body shape in the world, and for good reason. Developed by C.F. Martin & Company in the 1930s, its wide waist, deep body, and broad shoulders produce a powerful, bass-rich sound that cuts through a mix. If you're strumming chords around a campfire or leading a band without amplification, the dreadnought delivers.

The trade-off is comfort. The large body can feel unwieldy for smaller players or anyone used to a classical guitar. Sitting down with a dreadnought requires more arm reach. But for raw acoustic volume and a balanced, full-bodied tone, nothing beats it.

Best for: Strumming, flatpicking, singer-songwriters, country, folk, bluegrass.

Concert and Grand Concert — The Fingerpicker's Choice

Concert (0) and grand concert (00) shapes have narrower waists and smaller bodies than dreadnoughts. They emphasise midrange frequencies and produce a more focused, articulate tone that rewards fingerstyle technique.

These guitars are more comfortable to hold, especially for extended playing sessions. The reduced bass response means they won't overpower a vocal performance — they sit underneath the voice rather than competing with it. Taylor's Grand Concert models and Martin's 0 and 00 series are benchmark instruments in this category.

Best for: Fingerpicking, recording, intimate performances, smaller-framed players.

Grand Auditorium — The Versatile Middle Ground

The grand auditorium (sometimes called the orchestra model at Martin, or the GA at Taylor) sits between the dreadnought and concert in size and tone. It handles both strumming and fingerpicking well, making it arguably the most versatile body shape available.

Grand auditoriums have a slightly narrower waist than dreadnoughts, a more pronounced curve, and a balanced frequency response that doesn't lean too heavily into bass or treble. Taylor's 214ce and 314ce are among the best-selling acoustic guitars in Australia, both grand auditorium shapes.

Best for: Players who switch between strumming and fingerpicking, live performers, those who want one guitar for everything.

Jumbo — Maximum Volume and Presence

Jumbo guitars (think Gibson J-200 or Guild F-50) have the largest bodies of any standard acoustic shape. They produce enormous volume with deep bass and sparkling treble. The wide, rounded body moves a lot of air.

Jumbos are statement instruments — visually striking and sonically commanding. They excel in live settings where you need to project without amplification. The downside is size: they're heavy and can be uncomfortable for long sessions.

Best for: Strumming with authority, stage presence, country, rock, blues.

Parlour and Travel Guitars — Compact and Portable

Parlour guitars are small-bodied instruments that date back to the late 1800s. They produce a focused, intimate tone with less volume but a character that's uniquely charming — think blues, ragtime, and singer-songwriter material. Modern parlour guitars from brands like Maton and Taylor have revived the shape for players who value portability and comfort.

Travel guitars (like the Martin LX1E or Taylor GS Mini) take portability further, using a scaled-down body and shorter scale length. They're excellent practice instruments and genuinely playable guitars, not toys.

Best for: Travel, practice, small-space living, blues, intimate performances.

Body Shape Comparison at a Glance

Soundboard (Top) Woods

Sitka Spruce is the most common soundboard wood. It's strong relative to its weight, responds well across all playing styles, and produces a bright, clear tone with excellent dynamic range. If a spec sheet doesn't name the top wood, it's almost certainly Sitka spruce.

Engelmann Spruce is lighter and more responsive than Sitka, producing a warmer, more nuanced tone. It rewards a lighter touch and is favoured by fingerstyle players.

Western Red Cedar is darker in both colour and tone. Cedar tops are warm, rich, and respond instantly — they don't need years of playing-in to open up. The trade-off is slightly less headroom: push too hard and a cedar top compresses rather than projecting further. It's the traditional choice for classical guitars and a beautiful option for fingerstyle steel-string players.

Redwood and Adirondack Spruce are premium options. Redwood is similar to cedar but with more projection. Adirondack (or red) spruce was the standard before the 1940s — it's stiffer and louder than Sitka, prized for vintage-style projection. Both are expensive and typically found on guitars above $3,000.

Back and Sides Woods

Mahogany produces a warm, focused, midrange-heavy tone. It's the classic pairing with spruce for blues, folk, and singer-songwriter styles. Martin D-18 and D-15 models are the benchmark for the spruce/mahogany combination.

Rosewood (Indian or East Indian) delivers a wider frequency range — deep bass, sparkling treble, and a complex overtone character often described as "scooped" in the mids. The Martin D-28 and Taylor 314ce showcase this tonewood beautifully. It's the most popular back-and-sides wood for premium acoustics.

Maple is bright, reflective, and projects clearly. It adds less of its own colour to the sound, making it popular for live and studio work where clarity and note separation matter. It's also visually striking — flame and quilted maple are among the most beautiful guitar woods.

Koa is a Hawaiian hardwood with a tonal character between mahogany and rosewood. It starts bright and warms with age. Taylor and Maton both produce stunning koa-bodied acoustics.

What to Expect at Each Price Point

Key Differences Between Acoustic and Electric

An acoustic guitar produces sound mechanically through body resonance. You don't need an amplifier, cables, or power. It's self-contained and portable. The strings are typically heavier gauge (thicker), which requires more finger pressure but produces a fuller, louder unplugged sound.

An electric guitar uses magnetic pickups to convert string vibration into an electrical signal that's sent to an amplifier. Without an amp, an electric guitar is nearly silent. Electric strings are lighter gauge, making bending and fast playing easier on the fingers. The tone is shaped as much by the amp, pedals, and pickups as by the guitar itself.

Side-by-Side Comparison

Acoustic Guitar Strings: Materials and Gauges

Steel-string acoustic guitars use strings made from bronze (bright and articulate), phosphor bronze (warmer with longer life), or coated variants (like Elixir Nanoweb, which resist corrosion and last 3–5 times longer). For beginners, light gauge strings (typically .012–.053) are easier on the fingers while still producing good volume.

Classical (nylon-string) guitars use nylon treble strings and silver-wound nylon bass strings. Never put steel strings on a classical guitar — the higher tension will damage the neck and bridge.

Change your strings every 2–4 weeks if you play daily, or whenever they start sounding dull, feel rough, or show visible discolouration. Fresh strings make any guitar sound dramatically better.

Must-Have Accessories for Every Guitarist

Why a Professional Setup Matters

A guitar setup involves adjusting the action (string height), neck relief (truss rod), intonation (tuning accuracy up the neck), and nut slots to optimise playability. Even expensive guitars benefit from a setup tailored to your string gauge and playing style.

A good setup typically costs $60–$120 at a specialist shop and transforms how a guitar feels. If you're buying a guitar from a dedicated guitar store (not a department store or online), ask for a setup as part of the purchase — many shops include it.

Humidity, Temperature, and Storage

Wood expands in humid conditions and contracts in dry ones. For acoustic guitars, the ideal relative humidity is 45–55%. Below 40%, the top can shrink and crack. Above 60%, the top can swell, raise the action, and dampen the tone.

In Melbourne, humidity is generally guitar-friendly, but air conditioning and heating can dry out indoor air dramatically. If you keep your guitar in a case with a humidifier (like the D'Addario Humidipak two-way system), you're covered. If you display your guitar on a wall or stand, invest in a room hygrometer and a small humidifier for dry months.

Avoid leaving your guitar in a car, direct sunlight, or near heating vents. Rapid temperature changes are more dangerous than gradual ones — let the guitar acclimatise in its case before opening it after a cold or hot journey.

Cleaning and Routine Maintenance

Wipe down the strings and fretboard with a dry microfibre cloth after every session. This removes oils and sweat that corrode strings and grime the fretboard. Once a month (or at every string change), clean the fretboard with a dedicated fretboard conditioner — lemon oil for unfinished rosewood or ebony, nothing for maple (which is typically sealed).

Polish the body with a guitar-safe polish (not household furniture polish, which contains silicone). Clean the hardware — tuning machines, bridge pins, strap buttons — with a dry cloth.

Every 12–18 months, take the guitar to a luthier or guitar tech for a general check: action, neck relief, nut condition, fret wear, and electronics (if applicable). Preventive maintenance catches small issues before they become expensive repairs.

Martin — The Original

C.F. Martin & Company has been building acoustic guitars since 1833. They invented the dreadnought body shape, pioneered X-bracing, and set the standard that every other maker measures against. The D-28 is arguably the most iconic acoustic guitar ever made — rosewood and spruce, powerful projection, and a tone that's been on more hit records than any other instrument.

Martin's lineup covers every price point: the LX1E (travel guitar, ~$600), the D-15M (all-mahogany, ~$2,200), and the D-28 (~$4,500). Their Road Series offers solid-wood construction at mid-range prices. In Australia, Martin is widely stocked at specialist retailers.

Taylor — Modern Precision

Taylor Guitars revolutionised acoustic guitar manufacturing with CNC precision, the NT (New Technology) neck joint (a bolt-on system that allows easy adjustment), and their Expression System 2 pickup — one of the best acoustic-electric systems on the market.

Taylor's lineup is organised by series number: 100 series (entry-level, layered wood), 200 series (solid top, layered back/sides), 300 series (all-solid, sapele/blackwood), and up. The 214ce and 314ce are perennial best-sellers in Australia. Their GS Mini is the most popular travel guitar in the country.

Maton — Australian Made

Maton has been handcrafting guitars in Melbourne since 1946. They use Australian tonewoods — Queensland maple, blackwood, and bunya pine — that give their instruments a distinctly warm, rich character. Their AP5 Pro pickup system is widely considered one of the best onboard acoustic systems available.

The SRS808 is Maton's flagship — an all-solid small-body guitar with extraordinary tone. The EBG808 is their dreadnought equivalent. Maton guitars hold their resale value exceptionally well in Australia and are the go-to choice for many Australian professional musicians including Tommy Emmanuel.

Gibson, Yamaha, Fender, Cole Clark, and More

Gibson — The J-45 is the iconic Gibson acoustic. Round-shouldered dreadnought, warm and woody. Premium prices ($3,500+) but Epiphone offers excellent Gibson designs at lower price points.

Yamaha — Unbeatable value at the entry level. The FG800 (~$350) and FG830 (~$500) consistently outperform guitars twice their price. Yamaha's quality control at scale is remarkable.

Fender — Better known for electrics, but Fender's acoustic range (especially the Paramount series) has improved dramatically. Good value in the $600–$1,500 range.

Cole Clark — Another Australian maker, based in Melbourne. Known for using native Australian timbers (bunya, blackwood, redwood) and their exceptional 3-way pickup system. The Fat Lady series is their flagship.

Guild — American-made guitars with a reputation for wide necks, big bodies, and jumbo models. The F-55E and D-55 are superb.

Brand Quick Reference