Guitar Setup Basics You Can Do at Home
Most of the guitars that come across my bench do not need parts. They need a setup: a few small adjustments that turn a stiff, buzzing instrument into one that feels easy under the fingers. The basic setup is something you can learn to do yourself in an afternoon, and it will change how much you enjoy your guitar more than any pedal will. Here is the order I teach it in.
Tools you actually need
- A set of feeler gauges, the kind sold at auto parts stores.
- A 6-inch steel ruler marked in 64ths of an inch.
- The hex wrench that fits your truss rod (usually included with the guitar).
- A small screwdriver or hex key for the bridge saddles.
- A capo, a tuner, and fresh strings.
That is $30 of tools. A nut file set is the one expensive item, and it is fine to leave nut work to a tech at first.
Step one: neck relief
The neck should have a very slight forward bow, called relief. Put a capo on the first fret, press the low E string down at the fret where the neck joins the body, and look at the gap between the string and the top of the 8th fret. You are looking for something around .008 to .012 inches, roughly the thickness of a business card. Use the feeler gauge.
If there is no gap, the neck is too straight or back-bowed; loosen the truss rod a quarter turn counterclockwise. If the gap is much bigger, tighten a quarter turn clockwise. Wait a few minutes, retune, and measure again. Small moves. If the rod feels stuck or creaks, stop and take it to a tech.
Step two: action
Action is the string height at the 12th fret, measured from the top of the fret to the bottom of the string. A comfortable starting point for most players is 4/64 inch on the low E and 3/64 inch on the high E. Lower feels faster but buzzes sooner; higher is cleaner but harder to play.
Raise or lower the saddles or the bridge posts to get there, then play every fret on every string with your usual picking strength. A little buzz you cannot hear through the amp is acceptable. Notes that choke out are not; raise the action slightly.
Step three: intonation
Play the 12th fret harmonic on a string, then fret the same note. If the fretted note is sharp, move the saddle back, away from the neck. If it is flat, move it forward. Adjust, retune, and check again until both notes match on the tuner. Do this on every string with the guitar in playing position, because the neck bends slightly when you sit up.
Intonation is the last step for a reason: relief and action both change string length a bit, so do them first.
The nut
If your open chords sound sharp even after intonating, or the strings feel stiff in the first three frets, the nut slots are probably too high. Check by pressing a string at the 3rd fret and looking at the gap over the 1st fret; it should be barely there, about the thickness of a sheet of paper. Cutting nut slots deeper takes proper files and a light touch, and cutting too far means a new nut. This is the one setup job I tell beginners to hand off.
When to see a tech
- The truss rod is at the end of its travel and the neck still will not straighten.
- Frets are worn into flat spots, or one fret sits high and buzzes on its own.
- The guitar will not intonate no matter where the saddles go.
- Anything involving the nut, a tremolo rebuild, or electronics.
A professional setup runs $50 to $90 in most towns and includes fret polishing and cleaning. If you have just bought a new guitar, especially one ordered online, this is the first place your money should go. The guide on buying a guitar online explains what to check on arrival before you decide.
Do the relief, the action, and the intonation yourself. Do them again every time the seasons change and the wood moves. After a couple of rounds, you will feel your guitar shift before you can measure it, and that is the point where the instrument starts to feel truly yours.