The low E string on an acoustic guitar is the longest string, so it’s also the most likely to be out of tune. There are a few things that can cause the low E string to be out of tune, and there are a few things you can do to fix it.
Here are some possible causes of a low E string intonation problem:
- The intonation screws are not adjusted correctly. The intonation screws are located on the bridge saddles. They control the length of the string at the bridge, which affects the intonation. If the intonation screws are not adjusted correctly, the strings will be too long, which will make the notes sharp.
- The strings are too old or worn out. Old or worn out strings will stretch more than new strings, which can cause the intonation to go out of whack.
- The neck is bowed. A bowed neck will cause the strings to be too long, which will make the notes sharp.
- The nut is too high. The nut is the small piece of bone or plastic at the headstock of the guitar that the strings rest on. If the nut is too high, the strings will be too long, which will make the notes sharp.
Here are some steps you can take to troubleshoot a low E string intonation problem:
- Check the intonation screws. Make sure that the intonation screws are adjusted correctly. If they are not, adjust them until the notes are in tune at the 12th fret.
- Replace the strings. If the strings are old or worn out, replace them with new strings. This may fix the intonation problem.
- Check the neck. If the neck is bowed, have it adjusted by a qualified luthier.
- Check the nut. If the nut is too high, have it filed down by a qualified luthier.
If you’ve checked all of these things and your low E string intonation is still a problem, you may need to take it to a qualified luthier for further diagnosis. They will be able to help you figure out what’s causing the problem and fix it.
Here are some additional tips for troubleshooting guitar intonation:
- Use a tuner to check the intonation. This will give you a more accurate measurement than just listening to the notes.
- Be patient. It may take some time to get the intonation perfect.
- If you’re having trouble, you can always take your guitar to a qualified luthier. They will be able to help you get your guitar set up properly.
With a little patience and troubleshooting, you should be able to get your low E string intonation back in tune.
Here are some additional tips for acoustic guitar intonation:
- Use a quality tuner. A good tuner will help you get more accurate readings and make it easier to adjust the intonation.
- Check the intonation at the 12th fret. This is the most important fret for intonation, so it’s important to make sure that the notes are in tune here.
- Be patient. It can take some time to get the intonation perfect, so don’t get discouraged if you don’t get it right away.
- If you’re having trouble, ask for help. A qualified luthier can help you get your guitar set up properly and make sure that the intonation is correct.

