Such a simple chord, but it is extremely useful. The power chord is a chord that fits best in the rock or metal style of playing. They are useful for comping especially with a band. When you play with a band, there are other people there that you shouldn’t step on. If you play too many notes you will likely step on someone else. Power chords are created to avoid this. How do you play a power chord?
A power chord is a 2 note chord. It is made of the root note and the fifth. Because of this, the chord has no tonality. It can be major or minor, but it cannot be diminished of augmented. Any time you see a minor chord or a major chord these power chords will fit perfectly over them. Remember the third of the chord is what determines if it is a major or minor chord. Power chords omit the third so it can be easily played over both.
A power chord can be played on any 2 string set, low or high. Some work better for some styles than others, and some work better in a band situation than others. Learn power chords on all the strings, but what you decide to use comes down to personal style and experience. Remember, if you are playing with a band you will be playing with a bass. Power chords on low strings may clash with the bass player. Experiment and find what works with you and your style of playing.
Earlier we stated that power chords are made of tones 1 and 5. When you find voicing that you can use with the root and fifth note then experiment with voicing’s where the fifth is the lower note. This way you will be playing 5 and 1. They are the same notes, but this gives you more options to use when you are comping with a band. Also one other thing you can do with power chords is add the root on top on the power chord. This would be root, fifth, root. This will fill out your chord a little more.
Now you know what power chords are, and how they are used. They have no tonality, meaning they can be either major or minor chords. These chords are best used with a band, so use them and experiment to find your own style. Below are a couple of diagrams, but not all, of some power chords you can use. Find all of them and memorize them so that when the time comes you play with a band, you will be ready.