A Major 9 (Amaj9) Chord Guitar

A bright major 9th anchored by the open A string.

A full five-tone major 9th (1-3-5-7-9) anchored by the open A.
A lush upgrade to a plain A major.
Turns a simple strummed part into something that sounds like a record.
The sophisticated, floating quality of jazz and dream-pop.

Root9th3rd5th7th

Not played

E6th string

FretMuted

Finger—

Root

ABass5th string

FretOpen

Finger—

5th

D4th string

Fret2

Finger1 index

9th

G3rd string

Fret4

Finger3 ring

3rd

B2nd string

Fret2

Finger1 index

7th

e1st string

Fret4

Finger4 pinky

NotesA – E – B – C# – G#

Formula1 – 3 – 5 – 7 – 9

Voicingx02424

TonesA×1·C#×1·E×1·G#×1·B×1

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This chord sounds even better than it looks.

Load A Major 9 (Amaj9) onto an interactive fretboard, hear every note, and build it into a progression.

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Questions about A Major 9 (Amaj9)

What notes are in a A Major 9 (Amaj9) chord?

A A Major 9 (Amaj9) chord contains the notes A, E, B, C#, G#. It is built from the major 9th formula 1 - 3 - 5 - 7 - 9, with A as the root.

Is Amaj9 a major or dominant chord?

Amaj9 is a major chord — it contains a major 7th (G♯), which gives it a lush, resolved sound. That's different from A9 (dominant 9th), which has a flat 7th (G) and sounds tense and bluesy. The 'maj' in maj9 always refers to that major 7th, not just the 3rd.

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