When Dave Grohl Used an Amp in a Gas Can to Make Foo Fighters’ Lo-Fi Debut

There is something uniquely nostalgic and spontaneous about the sound of Foo Fighters. The crunchy guitars and uptempo beats are straight off the heels of the grunge movement, with elements of punk and metal—staples of Grohl’s musical influences growing up—plus a sweet, melancholy shoegaze vibe, which permeates songs like “Floaty” and “X-Static.” These recordings are lo-fi, but still deliberate and precise, a testament to both Grohl’s skill as a musician as well as the limited session time allotted to complete the album.

The gear used to record this album has always been an intriguing mystery to me, and one piece specifically kept popping up in my research: an amp known as the Can. Over the years, both Grohl and Jones have cryptically mentioned a mythical amplifier that provided the most glorious, disgustingly raunchy fuzz tones, heard most notably on closing track “Exhausted.” For a long time, fans online talked about a “gas-can amp,” an “oil-can amp,” or even some claiming the effect was achieved by placing a microphone into a metal can next to a guitar amp—nobody was quite sure what exactly the source of this sound was.

In 2021, Jones hosted an “ask me anything” live stream on his YouTube channel. I was lucky enough to catch it, and the first question I asked was about this mystery amp. That’s when I first laid my eyes on the Can. It’s literally what it sounds like: a small, battery-powered practice amp built into a red plastic Jerry can. My mind was blown; I needed to know more.