70's Electro Harmonix LITTLE BIG MUFF code EF321

Same silky smooth violin-like sustain and creamy tone that made the legendary 1970 Big Muff Pi famous

http://www.kitrae.net/music/big_muff_history.html

https://www.youtube.com/watch?v=F_nbyCseA8Q

https://www.youtube.com/watch?v=tIywaPJARKU