Somehow, on last year's Brothers record, Dan Auerbach and Patrick Carney of the Black Keys managed to sound like two stealth slackers.
It had that swaggering, hip-hop-influenced blues rock sound that has become their trademark over the past 10 years, and bristled with attitude. But there was a deliciously laid-back tempo and looseness to it too.
It was a classic and, in some parts of the world at least, it was the duo's breakthrough album selling more than 1.5 million copies.
On seventh album El Camino, they let loose once again but up the pace. Not so much in a wild and brazen style, but in a carefree and joyous way - like on the glammed up stomp and serenade of Nova Baby.
It's the sound of a band who walked into the recording studio, plugged in and played. Yes, much like they have always done, but this time what came out was 11 quick-fire tracks of effortlessly arse-shaking rock 'n' roll with a far broader appeal than anything they've done before.