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Amaj(add9)/B is the A major add 9 / B (3rd inversion) guitar chord with B in the bass. It uses the notes A, C♯, E, and B and the interval formula 1-3-5-9.
The A major add 9 major add 9 chord extends the major triad with an added ninth B, creating a bright, expansive harmony. Unlike the major 9 chord, it lacks the major seventh, offering a fresher, more open sound often used in pop, rock, and jazz for uplifting atmospheres. With B in the bass, this voicing functions as the 3rd inversion of A major add 9.
Also written as Amaj(add9), Aadd9/B, and AMadd9/B.
These are quick-start shapes for players who want the answer first and the deeper theory second.
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Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
The root anchors the chord and defines its tonal center.
This note defines the chord's major quality and brings brightness to the sound.
The fifth reinforces stability and gives the chord its strong harmonic frame.
The ninth opens the chord up and adds a modern, spacious color.
Every shape is shown with its diagram and exact fingering instructions.
Amaj(add9)/B uses the notes A, C♯, E, and B. Its interval formula is 1-3-5-9.
Amaj(add9)/B is also written as Amaj(add9), Aadd9/B, and AMadd9/B.
Place the 1st finger on the 2nd fret of the 2nd string, 3rd string, 4th string, and 5th string in barre position. Let the first string ring open. Strum from the 5th string down.
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