What’s the Difference Between a Classical and Acoustic Guitar?

What’s the Difference Between a Classical and Acoustic Guitar?

Like with any new hobby, learning to play guitar comes with a slew of new terms and qualifiers that you’re probably puzzling over.

The difference between a classical and an acoustic guitar is just one of many things you want to know about as you start your musical journey.

It’s pretty straightforward, and I’m happy to detail for you exactly what sets these two types of guitars apart.

First Things First: They’re Both Acoustics!

The first thing you should know is that when you ask “what’s the difference between a classical and an acoustic guitar?” is that what you really want to know is “what’s the difference between a classical and a steel string guitar.

Classicals are, by definition, acoustic guitars, but the term acoustic is frequently used to refer only to those that are strung with steel strings.

This is probably due to the prominence of steel string guitars over classical guitars in popular music, and most people will assume you’re talking about a steel string guitar if you mention an acoustic, but it’s important to know that classicals are themselves acoustic instruments.

Sound

With different body sizes and different string types comes a big difference in the way steel string guitars and classical guitars sound.

Steel string acoustics, especially the large-bodied dreadnoughts, can be played quite loudly without losing any sonic clarity. Take one to a busy intersection and jam out on the sidewalk and you’ll see you can be heard fairly well over the sound of traffic.

Classical guitars, on the other hand, are much quieter. With acoustics, body size determines volume, and classicals have a lot less space for the sound to be internally amplified.

Nylon strings, as you might imagine, don’t have a lot of oomph either.

This makes classicals soft, warm, and mellow sounding compared to the big, brassy, bold tone of their steel string cousins.

Construction

So, with that out of the way, let’s talk about their physical differences: namely, how they differ in build and construction.

Looking at the two from a distance, the first and most obvious difference you’ll notice is that steel string guitars usually have larger bodies than classical guitars.

Although steel string acoustics come in a range of sizes [explained in depth here] including mini instruments for children and medium-sized parlor guitars, they are most commonly found with dreadnought bodies, smaller only than the “jumbo” style body of some uncommon larger acoustics.

Classical guitars also come in a variety of sizes, ranging from the smallest Piccolo style body to the largest Contra bass styles.

Most commonly, you’ll find the Prime, or Concert style body in classical guitars.

These are further categorized from largest to smallest, notated 4/4 (full-size), 3/4, 1/2, and 1/4. Generally the most common classical guitar body will roughly compare with the parlor size in steel string acoustics.

The next obvious difference between classical and acoustic guitars is that the fretboard of classical guitars is anywhere from six to twelve millimeters wider than the width found on steel string instruments.

This serves two purposes: it adds strength and stability to the guitar’s neck, and the greater string spacing accommodates fingerstyle playing used on classicals.

Sizing aside, there are a few more construction differences worth noting.

  • Typically thought of as the main difference between the two types of guitars is the string material. Obviously steel string guitars have, you guessed it, steel strings. Classical guitars are strung with nylon, with the bass strings sometimes made of nylon wound with copper.
  • Nylon strings are under much less tension than steel strings, which enables the final two differences in build. Since the strings aren’t pulling so hard on the neck, classical guitar necks are usually solid wood, without the truss rod found in steel string guitars.
  • The truss rod in other acoustics adds support to the neck, keeping it straight while under pressure from the tightly wound steel strings. Make sure you know how to change strings on your classical guitar so you’re not tempted to use steel strings which can seriously damage your neck.
  • Finally, also contributable to the differences in string tension, is the fact of internal bracing. Steel string acoustics need a lot more support inside the body to keep it from collapsing under the pull of its strings, whereas classical guitars need very little.

Without this sturdy internal bracing system, classical guitars are generally significantly lighter than acoustics of around the same size.

You can see prime examples of great classical guitar construction by reading about the best classical guitar brands [link to Best Classical Guitar Brands article].

Playability

How do these differences in build affect the playability of the guitars?

First, it’s obvious that the wide fretboard is going to change how the instruments play.

You’ll need a wider fingering position to fret chords on a classical than you’ll need on a steel string guitar, and a longer reach for those riffs that require multi-fret jumps, as the fret spacing on acoustics is a bit shorter than classicals.

What about the steel versus nylon strings?

Nylon strings are much easier on the finger tips and don’t cause as much pain to beginner guitarists as do steel strings. But this softness of material also means you can’t really play with a pick.

Classical guitars are intended to be plucked with the fingertip or fingernails; using a pick will cause string breakage in short time.

Need to practice your fingerstyle technique?

Here are 111 songs for classical guitar perfect for beginners.

They’re also held differently and require different playing postures, at least if you’re going to be formal about it.

The smaller body size and shallow waists of classical guitars don’t rest on the thigh; instead, you’re supposed to hold it between your legs with the neck pointing more skyward than how steel string acoustics are played.

A Note About Nylon String Guitars

Not all guitars with nylon strings are classical guitars! They have a similar relative in the guitar family called a flamenco guitar. The main differences between classical and flamenco guitars are:

  • Flamenco guitars are smaller than a 4/4 classical .
  • They are built with different types of wood: flamencos typically with cypress and maple, and classicals usually with rosewood.
  • Due to the wood choices, flamenco guitars are brighter and snappier than the warm, mellow classical guitars.
  • Flamenco guitars often have a “tap plate” that protects the top of the guitar from damage caused by the percussive tapping used in much flamenco-style playing.

Flamenco guitars are more of a rarity in music shops than classical guitars, but if you find one, compare the two and you’ll see how different they can be!

The Final Word

That should clear things up a bit regarding the differences between classical guitars and acoustics.

Either one could work well for you depending on the type of music you’re wanting to play. Just remember: steel string acoustics are big, loud, and can be played with a pick.

Classical guitars are smaller, quieter, more mellow, and require you to learn  the fingerstyle technique made famous by some of the best classical guitar composers in the world. If a classical guitar sounds right for you, check out our review of the best classical guitars for the money.

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