Voicing of A Major 6

Drop 2 III

Back to A6

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Left hand
A2
Right hand
A3E4F#4C#5
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Drop 2

The Drop 2 III voicing of A6 stacks A, E, F# and C# from the bottom up: the root, 5th, 6th and major 3rd of the chord.

It's one of the Drop 2 voicings: four-note chords in close position with the second note from the top dropped an octave, played over the root. The others for A6 are Drop 2 I, Drop 2 II and Drop 2 IV.