The Abm/Eb chord is an Ab minor chord, with the Cb (the 5th) as the bass note.
The Ab minor chord itself has a dark, melancholy sound. Playing the 5th of the chord (in the case of Abm, the 5th is Eb) as the bass note, can make the chord sound even more dark and dramatic, even if it is only a subtle difference.
The chord is also referred to as A flat minor over E flat, or Abm ‘slash’ Eb, or simply, A flat minor with an E flat in the bass.
Technically, the A flat minor chord with the E flat in the bass is a second inversion A flat minor chord.
Some Abm/Eb Chord Theory and Info
- The Abm/Eb chord contains the notes Eb, Ab and Cb.
- It is an Ab minor chord with a Eb in the bass.
- The root note of Abm/Eb is Ab, the bass note is Eb.