Try to keep your skull glued on while geeking out on the gear the Grammy-winning producer uses to make epic albums with Foo Fighters, Alice in Chains, Deftones, Korn, Rush, Mastodon, and others.

A mighty 8-watter, this Masco is from the 1940s—just two tubes, a transformer, an 8-inch speaker, and mojo. It’s the sort of amp that might have originally been sold with a lap steel. “It has one setting,” Nick says. “On.”

D'Addario Micro Tuner:

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