Watch the A Minor Clusters online guitar lesson by Frank Vignola from Inversion Excursion

When you see an Amin or Amin altered chord in a piece of music, think about this Amin chord in it's simplest form meaning an A minor triad. This allows you to have the choice of all the different chord types and inversions to choose from. You may choose an A minor 7th or A minor 6th or any of the chord types we went over in the previous segments. Try connecting the different chord types. For example: Try A minor 7th for 4 beats to A minor 6th for 4 beats moving through the different inversions.
A chord cluster is a 3 note chord usually within the range of a fifth using any 3 notes in the various inversions and chord types we discussed. Example is B (9th) on the 3rd string (4th fret), C (3rd) on the 2nd string (1st fret) and open E (5th) on the 1st string. Tightly voiced three note chords are called chord clusters. We go over these chord clusters in detail during this segment. For each inversion, look at the chord and pick out each of the chord tones naming the notes.