Description
The Big Muff Pi wasn’t built with bass in mind, but generations of low-end players have claimed it anyway — and for good reason. That singing, violin-like sustain everyone talks about doesn’t just sit on top of your tone, it swallows your fundamental whole and hands back something denser, angrier, and impossible to ignore in a mix.
Run your bass into this thing and you get crushing distortion with real body behind it, not just fizz. The Tone control is where you’ll spend your time — roll it back to keep the low end intact and let the fuzz sit underneath, or push it forward when you want your bass to cut through like a second guitar. Either way, this pedal doesn’t do subtle, and that’s exactly why it’s stuck around on pedalboards for over 40 years.
True bypass keeps your clean tone untouched when the fuzz is off, so it’s safe to leave parked on your board for the one song that needs it. A 9V battery is included, or run it off your standard pedal power supply for gig-night reliability.
- True bypass
- Singing sustain with attitude
- Crushing distortion
- Adjustable tone control
- 9V battery included
If you’ve ever wanted your bass to sound like it’s about to tear the venue apart, this is the pedal that started that whole conversation.









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