Sixth chords are triads with an added major 6ᵗʰ. There are two common forms:
Major 6: 1-3-5-6
Minor 6: 1-♭3-5-6
Major 6 Drop 2 Voicings
The diagrams below show F6 Drop 2 voicings with the root, 3ʳᵈ, and 5ᵗʰ in the bass.
Example:
F6 = F-A-C-D
Fm6 = F-A♭-C-D
Using the NANDI Method, the 6 is easy to locate because it is one adjacent fourth above the 3. Simply use the 3 as your reference point to find the added 6.

Minor 6 Drop 2 Voicings
The diagrams below show Fm6 Drop 2 voicings with the root, ♭3ʳᵈ, and 5ᵗʰ in the bass.
Unlike the major 6 chord, the ♭3 and 6 form a tritone. Since tritones remain tritones when inverted, the ♭3 and 6 are one fret apart in both inversions (♭3-6 and 6-♭3) on adjacent strings in both inversions (♭3-6 and 6-♭3), except on the G-B string pair, where they are two frets apart. This makes the added 6 easy to locate from the ♭3.

Learn More
Master sixth intervals and sixth chords throughout the fretboard using the Guitar Intervals Unleashed book and companion mobile apps.
Buy “Guitar Intervals Unleashed“. Visit https://www.amazon.com/dp/1073714292
