Guitar Types & Construction
What Is a Guitar F-Hole?
An f-hole is an elongated curved sound opening shaped broadly like the letter f. Many archtop guitars, hollow-body electric guitars and semi-hollow instruments place one opening on each side of the bridge area.
The design comes from bowed string instruments, but on guitar it belongs to the construction and sound system of the specific body.
F-Hole vs Round Sound Hole
A flat-top acoustic guitar commonly uses one round sound hole in the centre area of the soundboard. An archtop commonly uses two f-holes positioned away from the centre.
Both are acoustic openings, but they accompany different top shapes, bracing systems, bridges and body designs. The outline alone does not determine the complete tone.
How F-Holes Work with an Archtop
On many archtops, string tension passes over a floating bridge to a tailpiece. The bridge drives the arched top while the f-holes allow the internal air to interact with the outside.
The openings also reduce and shape sections of the top. Their placement, length and surrounding reinforcement are therefore construction decisions, not decorative cuts added after the sound is designed.
Acoustic and Amplified Use
Acoustic archtops use the carved or pressed top and body cavity for projection. Hollow-body electric guitars add magnetic pickups, allowing the amplified sound to dominate in many settings.
At high volume, the resonant cavity can feed sound back into the pickups and amplifier. Players manage this through stage position, volume, muting, equalization and instrument design.
Care Around F-Holes
The narrow tips and edges can be vulnerable to impact. Do not use the opening as a grip point. Loose braces, internal rattles or cracks near the cutout should be inspected.
Because the openings provide access to the interior, labels, wiring and controls may be visible through them. Repairing electronics through an f-hole can be specialized work because there may be no removable back panel.
F-Hole Listening Exercise
- Play a short chord on an archtop acoustically.
- Listen close to the player position and several feet away.
- Repeat with a smaller chord voicing.
- If amplified, begin clean and at moderate volume.
- Move relative to the amplifier and note where feedback begins.
Why F-Holes Matter
F-holes identify a construction family in which an arched top, floating bridge, tailpiece and hollow body often work together. They help explain why an archtop responds differently from a flat-top guitar even before amplification is added.
Kalymi Tip
Do not judge an archtop only by the sound directly beside the f-holes. Listen from several feet away, where projection and note separation may be easier to evaluate.
When amplifying a hollow instrument, increase volume gradually and learn the stage positions that trigger feedback. Controlled feedback can be musical, but uncontrolled resonance should not be the first test of tone.
Keep picks, cloths and small objects away from the openings. Retrieving an item through an f-hole can require more work than expected and may damage wiring or the top.
Related Terms
Learn More
- Guitar Learning Path
- Guitar Arrangements
- Kalymi Music Library
- Guitar Chords Chart
- Gibson Acoustic Body Shapes and Archtop History
- Which Instrument Should You Learn First?
Reviewed by
Brent C. Robitaille,
music educator and founder of
Kalymi Music.