Fretted vs fretless
This is the single biggest fretboard decision on bass. Fretted and fretless are essentially two different instruments.
| Type | Board | Tone | Difficulty | Best for |
|---|---|---|---|---|
| Fretted | Metal frets define pitch | Precise, punchy, standard bass sound | Standard — frets handle intonation | Most genres, most players |
| Fretless (lined) | Fret lines painted or inlaid for visual reference | Smooth “mwah” sustain with visual guide | Moderate — lines help but ear is still essential | Fretless beginners, transitioning players |
| Fretless (unlined) | Blank board with side dots only | Pure fretless voice; maximum expression | Hard — requires developed ear and muscle memory | Experienced fretless players, jazz, fusion |
The signature fretless sound is the “mwah” — a nasal, singing sustain caused by the string vibrating directly against the wood instead of stopping cleanly at a fret. Think Jaco Pastorius on Portrait of Tracy. The effect is strongest with roundwound strings on a hard fingerboard.
Fretless maintenance: roundwound strings eat into soft fingerboard woods over time. Ebony or an epoxy-coated board resists wear. Flatwound or tapewound strings are gentler on the board but sacrifice some brightness and “mwah.”
Fretboard woods
The fretboard wood affects feel, tonal coloring, and — on fretless basses — durability under string contact.
| Wood | Feel | Tonal influence | Fretless suitability |
|---|---|---|---|
| Maple | Slick, hard, often lacquered | Bright, snappy attack | Usable with lacquer coating; one-piece maple neck |
| Rosewood | Slightly oily, open pores | Warmer, softened top end | Softer — wears faster under roundwounds on fretless |
| Ebony | Very hard, very smooth | Bright with a tight, defined attack | Preferred for fretless — resists string wear |
| Pau ferro | Between rosewood and ebony | Slightly brighter than rosewood, articulate | Decent — harder than rosewood, softer than ebony |
Rosewood is the most popular historically, but ebony is the go-to if you play fretless with roundwounds. Maple offers the brightest tone and is standard on vintage Fender basses.
Fretboard radius
The curvature of the fretboard surface. Smaller numbers mean more curve; larger numbers mean flatter. Bass radii tend to be larger than guitar because the neck is wider.
| Radius | Curvature | Feel | Common on |
|---|---|---|---|
| 7.25″ | Very curved | Vintage feel; good for chording but can choke bends at low action | Vintage Fender reissues |
| 9.5″ | Moderate curve | Good all-around — comfortable fretting without choking | Modern Fender standard |
| 12″ | Flatter | Low action without fretting out; fast playing | Many modern basses, Music Man |
| Compound (9.5″→14″) | Curves at the nut, flattens toward the body | Best of both — comfort at the nut, speed up the neck | Modern boutique and high-end production basses |
9.5″ is the most common modern bass radius. If you want the lowest possible action for fast playing, look for 12″ or a compound radius.
Fret sizes
Fret wire height and width change how much force you need to fret a note and how long the frets last before needing a level or re-fret.
| Size | Feel | Best for |
|---|---|---|
| Vintage / small | Lower profile; more direct contact with the board; precise fingering | Vintage Fender style, traditional players |
| Medium jumbo | Good balance of comfort and precision; the modern standard | Most modern basses, all-purpose |
| Jumbo / stainless steel | Tall, wide; less fretting effort; stainless lasts much longer | Heavy players, touring basses, extended lifespan |
Medium jumbo is the safe default. Stainless steel frets cost more up front but can outlast the player — worth considering if you play every day.