Skip to content

Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar Pedal

Marsoni M251S
Sale price$99.99
Pay 4 payments of $25.00 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar PedalOverview With original late 70s Op Amp Big Muffs selling for exorbitant prices, Mike Matthews decided to take the power to the people and reissue the classic pedal at a price that players could afford! The circuitry of the new EHX Op Amp Big Muff Pi sometimes also referred to as the IC or V4 Big Muff has been faithfully re created while several practical enhancements have been added including a compact, die cast chassis and true bypass switching. The
Easy Shipping

Quick Dispatch:

Your Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar Pedal orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar Pedal ships.

Need Help?
Questions about Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar Pedal, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Guitar Pedal in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 1995 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
T
Verified Purchase
Tara V.
Bozeman, US
★★★★★ 5
Tasty World Flavors for My Baby
Flavor Name: World Explorers Variety Pack, Size: 3.5 Ounce (Pack of 18)
I got the Serenity Kids 7+ Months World Explorer pouches to introduce my baby to more flavors. Each pouch is inspired by a popular dish from a different country, which makes mealtime fun and adventurous. They’re not meant to replace meals but are perfect for adding variety. Healthy and highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
T
Verified Purchase
The Clift’s
Pawtucket, US
★★★★★ 5
Always a Hit!
Flavor Name: World Explorers Variety Pack, Size: 3.5 Ounce (Pack of 18)
My son loves these so much! Amazing, quality ingredients! The variety packs are awesome because I buy in bulk and it makes it so much easier. Plus the variety itself is great. This is the only baby food pouch company that I trust and it’s the only one I buy from!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
A
Verified Purchase
Amazon Customer
Dallas, US
★★★★★ 4
Toddler loves them
Flavor Name: World Explorers Variety Pack, Size: 3.5 Ounce (Pack of 6)
I like the variety of flavors that I don’t get with standard food pouches. They’re like the food we eat, but they’re safe for my daughter which gives me peace of mind. I would buy more, more often, if it weren’t for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2024
A
Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 5
Child approved
Flavor Name: World Explorers Variety Pack, Size: 3.5 Ounce (Pack of 18)
Child loved all the flavors.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
S
Verified Purchase
S+B
Port Orchard, US
★★★★★ 5
Taste amazing with good quality ingredients
Flavor Name: World Explorers Variety Pack, Size: 3.5 Ounce (Pack of 18)
Love that I can expose my 6 month old to so many flavors so early on. Way better than rice cereal! I have tasted all flavors myself to see what my baby is eating and everything tastes amazing!!! Just bland, but thats good for babies ♡ good for use crunchy and silky Mamas
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 4, 2025

recommand products