Acoustic Guitar Body Selection Guide: Real Sound Comparison of 4 Popular Sizes

Why Body Selection Matters So Much

When you walk into a music store and see all those guitars on the wall, it's easy to feel overwhelmed. I want to help you understand the differences between body types in the most objective way possible. Guitars are unique instruments—they've evolved throughout history into various body designs, each with distinct sonic characteristics.

Choosing Body Size Based on Your Build

I recommend asking a store employee to help you select an appropriate size based on your body type. The main difference in body height affects the distance between your thigh and your right elbow. If you choose a body that's too large, you'll end up raising your shoulders and arms over time, which isn't great for shoulder health.

Here's a detail I always pay attention to: since guitars are portable, we play them in different settings. Sometimes you're on a low chair with your thigh at a steep angle, which raises the guitar; other times you're on a high stool with your thigh more extended, and the guitar slides down. I recommend testing a guitar with your right thigh kept straight and level—that's the only way to accurately feel how it sits in your lap.

Sound Comparison of Four Body Types

I prepared four guitars made from identical materials with only the body shape varying. I recorded them with professional stereo microphones and created three different examples: pure strumming, pure fingerstyle, and a song with percussive techniques.

D Body: The Full Orchestra

The D body is the oldest design, and I believe it has the fullest resonance. When you strum it, you get a very pronounced enveloping quality, with massive low-end presence that makes the whole guitar sound impressive. Using orchestral terminology, the D body is like a complete symphony—every frequency is full and continuous, creating a grand sound.

OM Body: The Reliable Rock Band

The OM is a classic, standard body that I think works especially well for fingerstyle. Through this comparison, I found that the OM's sound concentrates in the mid to mid-low frequencies, giving it a focused, powerful, and grainy character. I'd compare it to a rock band—smaller ensemble, all frequencies present, but not as continuous as an orchestra. Yet it's a completely cohesive sound. It's like a dependable friend who's honest and reliable.

AS Body: The Refined Modern Design

The AS is a newer design and the second-largest body in this comparison. At first listen, it might sound thinner, but if you listen through headphones, you'll notice it has wider frequency extension in both the highs and lows compared to the OM. This creates a more open, spacious quality with a refined character.

L Body: The Intimate Vocal and Piano Duo

The L body is Gibson's classic model and the smallest contender here. I didn't have much appreciation for small guitars before, but over the past few years I've grown to really admire their sound.

Here's how I'd describe it: imagine an ensemble with just a vocalist and a pianist, but the pianist only plays in the mid-to-high range, avoiding the very low notes. This intimate setup sounds very light, and the vocalist's tonal details shine through completely. For me, that's the L body's greatest appeal—it reveals the player's tonal nuances.

No Absolute Best, Only What Fits You

There are countless guitar body types out there, and different manufacturers have their own proprietary designs. This video focuses on how body size alone affects tone, and I believe these concepts apply to guitars from other makers too.

My advice: don't rush into buying a large body. When you visit a music store, first choose a size that fits your build. After you've played for a while and know whether you prefer something larger or smaller, that's when you can switch. There's no hurry.

Finally, I'm curious—which body type is your favorite, or what body does your current guitar have? Feel free to share in the comments!