Dave Grohl’s MXR Phase 90 

This is one of the few pedals that were actually photographed on Dave’s pedalboard at one point, aside from the Boss TU tuner and a delay pedal. However, it’s hard to tell whether he actually ever uses it, aside from on the song “Breakout”.

If you happen to come across any interview where Dave talks about this pedal, or you have any knowledge of when he used it, please be sure to leave a comment below