Semi-hollow and full hollow body guitars often get lumped together, but they're genuinely different instruments with different strengths. Here's a clear breakdown of what separates them.

Full hollow body construction

A hollow body guitar has a completely open, resonant cavity, much like an acoustic archtop, with pickups mounted onto the guitar without a solid centre block running through the body. This gives it a warm, rich, highly resonant tone with a lot of natural acoustic character even before amplification, closely associated with classic jazz and early rock and roll tones.

Semi-hollow construction

A semi-hollow guitar has hollow chambers on either side of the body, but with a solid block of wood running down the centre, through where the bridge and pickups sit. That centre block is the key difference, and it fundamentally changes how the guitar behaves.

Why the centre block matters

Full hollow bodies are prone to feedback at higher volumes and gain levels, since the large open cavity resonates easily and can start feeding back through an amplifier. The solid centre block in a semi-hollow guitar significantly reduces that resonance and feedback risk, while still retaining some of the airy, open tonal character the hollow chambers contribute. This makes semi-hollow guitars considerably more practical at higher stage volumes or with any real amount of gain.

Tonal differences

Full hollow bodies generally have the warmest, most resonant, most acoustic-like tone of the two, with pronounced low-end warmth. Semi-hollow guitars sit somewhere between a hollow body and a solid body electric, retaining noticeable air and warmth compared to a solid body, while offering more control, sustain and feedback resistance than a full hollow design.

Which suits which player?

Full hollow bodies suit players prioritising warmth and vintage character at lower to moderate volumes, jazz and early rock and roll styles in particular. Semi-hollow guitars offer a genuinely versatile middle ground, handling everything from clean, warm tones to moderate overdrive with far less feedback risk, which is why they've found a home across blues, roots rock and indie playing.

The bottom line

Neither is universally better, it comes down to how loud you play and what balance of vintage warmth versus practicality and feedback control you're after. Understanding the centre block is the key to understanding everything else about how these two guitar types actually behave.