Had the pleasure of seeing this band the other day, and I was absolutely blown away by their live performance.
Despite having only 2 members people are often baffled about how can a bass player emulate the sound of a guitar and do both instruments at the same time.
This article gives some explanation regarding this: http://onlineguitarlessons.co.uk/mike-kerr-royal-blood-get-sound/
I'm still sort of perplexed, but perhaps some of you musicians would understand this better.