What notes are in the A9 chord?

A9 is made of A, C#, G and B: the root, major 3rd, minor 7th and major 2nd above A.

What is the easiest way to play A9?

Play 525225 (low E to high E): barre fret 2 from the A to the B string.

A9 chord on guitar

A9 is a dominant ninth chord: funky and full. It is built from A, C#, G and B (formula 1 3 ♭7 9). Dominant ninths are the classic funk and soul rhythm chord, and a richer swap for a plain seventh. The easiest way to play it in standard tuning is 525225.

5 2 5 2 2 5

x x 7 6 8 7

x 12 9 12 10 9

A9 fingerings (low E to high E)

Barre at fret 2: 525225. Barre fret 2 from the A to the B string.
Fret 6: xx7687. Mute the low E and A strings.
Barre at fret 9: x-12-9-12-10-9. Mute the low E string, barre fret 9 from the D to the high E string.

Questions

What notes are in the A9 chord?: A9 is made of A, C#, G and B: the root, major 3rd, minor 7th and major 2nd above A.
What is the easiest way to play A9?: Play 525225 (low E to high E): barre fret 2 from the A to the B string.

Also try: A Major · A Minor · A7 · Amaj7 · Chord Charts