1. Turn it upside down
For a different take on the basic powerchord shape, try ditching the root note and playing the 5th interval as the lowest note instead.
You still need to play the root note, but it should be higher pitched than the 5th. This gives you a slightly thinner sound than the three-string voicing, but the benefit is that you can play the shape with just one finger, which makes for easy improvising.
Check out Deep Purple’s Smoke On The Water and ZZ Top’s La Grange for two great examples of this technique.
2. Add A♭2ND OR A♭5TH
Powerchords sound solid, steady and, err, powerful thanks to the root note and the 5th being in ‘perfect’ harmony. You can adapt this safe sounding chord and generate some nastier thrash metal style dissonance by alternating the root note with a b2nd (a semitone higher than the root note).
So, for example, with a G5 powerchord you’d end up playing G5/G# (a G5 over a G# root note). Alternate the 5th note with a b5th (a semitone lower than the 5th interval) for a nice variation on the theme.
You’d better get that pesky, unruly pinky finger of yours in good shape quick sharp because you’ll need it here. You’re adding another note to the powerchord formula this time around.
First of all you have your root note and second note two frets up from that as before; but now you’re going to add a third two frets up again on the G string.
This may seem like an awkward shape at first (practice by playing The Police’s Message In A Bottle – it’s all Add9 chords) but it’s worth it because it adds a majestic dimension to your riffs and rhythms.
The rise of progressive metal has seen guitarists hitting new lows in terms of the pitch they’re playing on seven- and eight-string guitars.
Powerchords played on these guitars sound totally different to a standard tuned six-string. Even if you don’t own a guitar with an extra string, there’s nothing to stop you down-tuning your six string to B standard (B E A D F# B) for some serious low-end. If you want to go as low as an eight-string, you’ll need heavier gauge strings so you can tune to F# B E A C# F#.