Minor 6th chords
The Minor 6th chord is a four-note chord that adds the sixth degree note in the scale to the minor triad. By comparing Cm with Cm6 we can see that the notes changes from C, Eb, G to C, Eb, G, A. The minor sixth chord can be a substitute for a common minor, but can sound somewhat dissonant depending on the musical circumstances.
Minor 6th chords
These are, generally, chords in open position, with Cm6 as an exception which is a closed chord (having no loose strings). Also noticeable is that Cm6, Fm6 and Bm6 are played with alternative bass notes, see different versions below.
Chord constructionCm6 x - x - Eb - A - C - G
Dm6 x - x - D - A - B - F
Em6 E - B - E - G - C# - E
Fm6 x - x - D - Ab - C - F
Gm6 G - Bb - E - G - D - E
Am6 x - A - E - A - C - F#
Bm6 x - x - D - G# - B - F#
Guitar versions of the chord
Notes in chordCm6 C - Eb - G - A
Dm6 D - F - A - B
Em6 E - G - B - C#
Fm6 F - Ab - C - D
Gm6 G - Bb - D - E
Am6 A - C - E - F#
Bm6 B - D - F# - G#
The intervals are 1 – b3 – 5 – 6
Movable minor 6th chord
The Minor 6th can be played as a barre chord. The diagram below shows a barre shape based on the Em6 shape with the root note on the 6th string.
To play, for example F#m6, the short notation is: 244242.
Voicings with bass note on 5th string
If you want to play the minor sixth with the bass note on fifth string, here are some voicings. Notice that the two shapes are movable. Concerning Gm6, Am6 and Bm6 the root note is note the same as the bass note.
Bm6: X 9 9 11 9 10
Here is one chord sequence that include a minor 6th:
G - Dm6 - E7 - Am7 - D7 - G
Notice that the Dm6 fits well before E7 since both include a B note, which Dm doesn't.