Built on a dual-channel design for boost and overdrive with familiar controls of a certain searing English amp and a whopping 35 decibels of power at hand, the Aura Amps Crunch Master summons the arena-filling roar of the Foo Fighters' signature sound in a single box. Inspired by the tones Dave Grohl gets out of his Marshall stack, this straightforward package of five knobs is an ideal option for those after mountains of gain with plenty of tone sculpting on tap.