The Texas rockers have used the same tone formula for decades, but when it comes to gear and making a statement, they’re kings of style.

The few pedals Gibbons currently uses live include an MXR Bass Octave Deluxe, an MXR Carbon Copy for slap delay, a Tech 21 MIDI Mouse, and a Peterson tuner. A Jimi Hendrix Octavio Fuzz runs through the Boss GE-7 Equalizer separately on one channel.

ZZ Top’s guitar and bass tech, Elwood Francis, explains the ins and outs of the newest guitars and basses that Billy Gibbons and Dusty Hill have out on the road for 2015.