Power Chords

A power chord is the basic type of movable chord.
The power chord is the building block of most
popular rock and metal songs.
Other than power chords incorporating the 5th string*,
the same shape is utilized to
build this chord anywhere on
the guitar fretboard.
Since there are only 2 or 3 notes
in a power chord, it is easy to play
and reposition for quick
chord transitions.

The power chord is known as a dyad because it is
comprised of only two notes, the root note and perfect
5th interval. Sometimes the root note is doubled to
sound a fuller tone. Being without a 3rd interval,
the power chord can sound major or minor
in a song. The chord name is written by
naming the root note and adding the number
5 for the interval, ex. E5 or A5.