![Hey I just attempted my first mod by trying to add a power supply to my big muff. When I plug everything in the pedal won't power on. Can someone tell me Hey I just attempted my first mod by trying to add a power supply to my big muff. When I plug everything in the pedal won't power on. Can someone tell me](https://preview.redd.it/hey-i-just-attempted-my-first-mod-by-trying-to-add-a-power-v0-su25l2wjwy3a1.jpg?width=640&crop=smart&auto=webp&s=4a11bebc6c244287623d188bf5efb957e63da879)
Hey I just attempted my first mod by trying to add a power supply to my big muff. When I plug everything in the pedal won't power on. Can someone tell me
![Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics](https://m.media-amazon.com/images/I/610pL2xDdXL._AC_UF894,1000_QL80_.jpg)
Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics
![Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments](https://m.media-amazon.com/images/I/31wu08jf02L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments
![9V myVolts replacement power supply compatible with Electro-Harmonix Little Big Muff Effects pedal | Fruugo US 9V myVolts replacement power supply compatible with Electro-Harmonix Little Big Muff Effects pedal | Fruugo US](https://img.fruugo.com/product/5/73/741453735_max.jpg)
9V myVolts replacement power supply compatible with Electro-Harmonix Little Big Muff Effects pedal | Fruugo US
![Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments](https://m.media-amazon.com/images/I/51ZEsqAKk3L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments
![Electro-Harmonix Big Muff Pi (Classic) - Distortion/Sustainer Battery included, 9.6DC-200 PSU optional - B's Music Shop Electro-Harmonix Big Muff Pi (Classic) - Distortion/Sustainer Battery included, 9.6DC-200 PSU optional - B's Music Shop](https://cdn.shoplightspeed.com/shops/639471/files/25735522/750x750x1/electro-harmonix-electro-harmonix-big-muff-pi-clas.jpg)
Electro-Harmonix Big Muff Pi (Classic) - Distortion/Sustainer Battery included, 9.6DC-200 PSU optional - B's Music Shop
![Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics](https://m.media-amazon.com/images/I/61O-qsP4YqL._AC_UF894,1000_QL80_.jpg)
Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics
![Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics](https://m.media-amazon.com/images/I/610rAoJYY1L._AC_UF350,350_QL80_.jpg)
Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics
![Electro-Harmonix Big Muff Pi Hardware Plug-in Effects Pedal and 2-in/2-out USB Interface | Sweetwater Electro-Harmonix Big Muff Pi Hardware Plug-in Effects Pedal and 2-in/2-out USB Interface | Sweetwater](https://media.sweetwater.com/api/i/q-82__ha-533bbba73cde7e6d__hmac-b17688d22f50275f0f43e104ec4beefc1c5bb724/images/closeup/750-BigMuffHW_detail1.jpg)
Electro-Harmonix Big Muff Pi Hardware Plug-in Effects Pedal and 2-in/2-out USB Interface | Sweetwater
![Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments](https://m.media-amazon.com/images/I/41YonJ1x-hL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Silverline Audio Replacement Power Supply/AC Adapter-EHX/Electro-Harmonix Pedals: Metal Muff, Germanium 4 Big Muff Pi, Little Big Muff Pi, Muff Overdrive, Double Muff, Pocket Metal Muff, Bigg Muff Pi : Musical Instruments
![Electro-Harmonix US9DC-100 Power Supply For Electro-Harmonix Big Muff Pi Classic/Double Muff/Small Clone Classic Pedals | Full Compass Systems Electro-Harmonix US9DC-100 Power Supply For Electro-Harmonix Big Muff Pi Classic/Double Muff/Small Clone Classic Pedals | Full Compass Systems](https://www.fullcompass.com/common/products/lgr/126779.jpg)
Electro-Harmonix US9DC-100 Power Supply For Electro-Harmonix Big Muff Pi Classic/Double Muff/Small Clone Classic Pedals | Full Compass Systems
![Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics](https://m.media-amazon.com/images/I/6124kZ28vGL._AC_UF350,350_QL80_.jpg)
Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Electro-Harmonix Little Big Muff Effects Pedal - US Plug : Electronics
![ELECTRO-HARMONIX LITTLE BIG MUFF PI DISTORTION/SUSTAINER BATTERY INCLUDED 9.6DC-200 PSU OPTIONAL - 683274010496 ELECTRO-HARMONIX LITTLE BIG MUFF PI DISTORTION/SUSTAINER BATTERY INCLUDED 9.6DC-200 PSU OPTIONAL - 683274010496](https://media.rainpos.com/7848/little_big_muff_1.jpg)