At The NAMM Show earlier this year, Dunlop debuted the MXR Dookie Drive, a signature pedal for Billie Joe Armstrong. Now, the Green Day frontman himself has revealed the amp that inspired Dookie‘s guitar tone.

In a video for MXR – itself a follow-up to a clip of Armstrong demoing the pedal – the guitarist said it was a Marshall 100-watt Plexi Super Lead that producer Rob Cavallo had provided the band during the album’s recording.

“We just plugged it in, and turned it up, and it sounded really good. All the tone was there,” Armstrong says in the video.

The American Idiot singer also shed light on the amp he used prior to the Marshall: a Gallien-Krueger 250RL. This amp featured on Green Day’s first two records: 39/Smooth and Kerplunk.

Watch part two of Armstrong’s introduction of MXR’s Dookie Drive above.

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