A great acoustic guitar can only reach its full potential when properly set up and maintained. In this section, I’ll cover the basics of guitar setup and maintenance, as well as address some common misconceptions about acoustic guitars.
Guitar Setup Basics
A proper setup makes a dramatic difference in how your guitar plays and sounds. While I recommend having a professional handle your initial setup (especially if you’re a beginner), understanding the process helps you communicate your preferences and maintain your instrument.
What a Basic Setup Includes
Action Adjustment
What it is: Setting the height of the strings above the fretboard.
Why it matters: Too high, and the guitar is difficult to play; too low, and you’ll get fret buzz.
How it’s adjusted: On acoustic guitars, primarily through the saddle height. The saddle can be lowered by sanding it down or raised with shims underneath.
Nut Slot Height
What it is: The depth of the slots in the nut where the strings sit.
Why it matters: Affects playability in the first position. Slots that are too high make the guitar harder to play near the headstock.
How it’s adjusted: Carefully filing the slots deeper (a job best left to professionals).
Neck Relief
What it is: The slight forward bow or curvature in the neck.
Why it matters: The right amount of relief allows strings to vibrate freely without buzzing.
How it’s adjusted: Via the truss rod, accessible either at the headstock or through the soundhole.
Warning: Truss rod adjustments should be made in very small increments (1/8 turn max at a time). If you’re unsure, have a professional do this.
Intonation
What it is: How accurately the guitar plays in tune up the neck.
Why it matters: Poor intonation means some chords will sound out of tune even when your open strings are properly tuned.
How it’s adjusted: On acoustic guitars, primarily through saddle positioning and compensation (angling the saddle and varying its height along its length).
When Your Guitar Needs a Setup
Your guitar may need a setup if you notice:
- Strings feel too high or hard to press down
- Excessive fret buzz
- Poor intonation (notes sound out of tune up the neck)
- Dead spots where notes don’t ring clearly
- Significant changes in weather or humidity
- After changing to a different string gauge
- When you first purchase a new guitar (even expensive guitars benefit from personalized setup)
DIY vs. Professional Setup
What You Can Do Yourself (Even as a Beginner)
- Change strings
- Clean the guitar body and neck
- Make minor saddle height adjustments (if you’re handy)
- Basic cleaning and polishing
What’s Better Left to Professionals (At Least Initially)
- Truss rod adjustments
- Nut filing or replacement
- Saddle shaping for intonation
- Fret work (leveling, crowning, polishing)
- Bridge or structural issues
My recommendation: Learn to do basic maintenance yourself, but develop a relationship with a good guitar tech for more complex work. Watch and ask questions during professional setups to learn more about your specific instrument.
My experience: I’ve seen some terrible guitars over the years, especially when I was still teaching private guitar lessons. Often though, a lot of the issues these guitars had could have been greatly improved with a proper setup. You can hear me talk about this in my video “How bad are cheap guitars? // I tested 4 affordable models”.
Humidity and Temperature Control
Acoustic guitars are sensitive to environmental changes, particularly humidity. Wood expands and contracts with changes in moisture content, which can affect playability and potentially cause damage.
Ideal Humidity Range
Optimal range: 45-55% relative humidity
Too dry (below 40%):
- Fret ends may protrude as the fingerboard shrinks
- Top may sink, lowering the action
- Cracks may develop, particularly in the top
- Bridge may lift in extreme cases
Too humid (above 60%):
- Top may swell, raising the action
- Neck may back-bow, causing buzzing
- Finish may appear cloudy or sticky
- Wood may warp in extreme cases
Humidity Control Solutions
Basic solutions:
- Guitar humidifier (Dampit, Oasis, D’Addario Humidipak)
- Room humidifier or dehumidifier
- Hygrometer to monitor conditions
Advanced solutions:
- Climate-controlled display cases
- Dedicated humidity-controlled rooms
- In-case humidity systems like the D’Addario Two-Way Humidification System
My advice: At minimum, use a case humidifier during dry seasons and a digital hygrometer to monitor conditions. For valuable instruments, consider more comprehensive solutions. Remember that stable humidity is better than fluctuating, even if not perfectly in the ideal range.
String Changing and Maintenance
String Changing Tips
- Change strings one at a time to maintain neck tension (unless you’re cleaning the fingerboard thoroughly).
- Stretch your strings after installation to improve tuning stability.
- Wind strings neatly downward on the tuning post for better stability.
- String gauge matters – lighter strings are easier to play but produce less volume; heavier strings offer more volume but require more finger strength.
- How often to change strings: For regular players, every 1-2 months or when they lose their brightness or develop visible corrosion.
Cleaning and Polishing
- Wipe down the strings and guitar body after each playing session with a clean, soft cloth.
- Clean fretboard when changing strings:
- Rosewood/Ebony: Lightly clean with appropriate oil (lemon oil, etc.) 2-3 times a year
- Maple: Usually finished, so just wipe with a slightly damp cloth
- Polish the body occasionally with guitar-specific polish. Avoid household furniture polish or any products containing silicone.
- Keep the guitar in its case when not in use to prevent dust buildup and exposure to sunlight, which can fade finishes over time.
My advice: Less is more when it comes to cleaning products. A good microfiber cloth will remove most finger oils and dust without any chemicals. For deeper cleaning, use only products specifically designed for guitars.
Setup Specifications Guide
For those interested in specific measurements, here’s a general guide to typical acoustic guitar setup specs. Remember, these are starting points – personal preference should always take priority.
String Action (measured at the 12th fret)
Low action:
- Low E: 1.8mm (2/64″)
- High E: 1.6mm (1/16″)
Medium action:
- Low E: 2.4mm (3/32″)
- High E: 1.8mm (2/64″)
High action:
- Low E: 2.8mm (7/64″)
- High E: 2.4mm (3/32″)
Neck Relief (measured by capo at 1st fret, press at body joint, measure at 8th fret)
Light relief: 0.1mm (0.004″) Medium relief: 0.2mm (0.008″) Heavy relief: 0.3mm-0.4mm (0.012″-0.016″)
Nut Slot Depth
Ideal height: Just slightly above the first fret. When pressing down between the 2nd and 3rd fret, there should be a tiny gap between the string and the 1st fret.
Saddle Height
Varies widely depending on bridge design, neck angle, and desired action. Typically, a saddle should protrude about 2-3mm above the bridge surface to ensure adequate downward pressure on the bridge.
Maintenance Schedule
Every Playing Session
- Wipe down strings and body with a clean cloth
- Check tuning
- Store properly in case or on stand
Monthly
- Thorough cleaning of body and neck
- Check for any developing issues (buzzing, intonation problems)
- Inspect for humidity-related changes
Every 6-12 Months
- Complete check of setup (or professional setup)
- Condition fretboard if needed
- Deep cleaning
- Check structural elements (neck angle, bridge, etc.)
Every Few Years (or as needed)
- Professional fret dressing/leveling
- Saddle and nut replacement
- Electronics check (if applicable)
- Bridge or structural repair (if needed)
A Personal Note on Setup and Maintenance
I’ve learned that even an inexpensive guitar can play beautifully with a proper setup, while an expensive one can be frustrating with a poor setup. Whether you choose to learn these skills yourself or work with a professional, understanding how your instrument functions helps you communicate what you want and maintain your guitar in peak playing condition.
Acoustic guitars are particularly sensitive instruments – they respond not just to how they’re played, but to their environment as well. Proper humidity control is not an optional extra but an essential part of guitar ownership. The small investment in a case humidifier and hygrometer can prevent expensive repairs down the road.
Finally, remember that guitars are meant to be played! The most important maintenance you can do is to simply take your guitar out and play it regularly. This keeps the wood vibrating, the joints stable, and most importantly, brings music into your life – which is why we have these wonderful instruments in the first place.
