A Electro-Harmonix Russian Big Muff Pi can be seen next to Russell's [Danelectro Reel Echo](http://equipboard.com/items/danelectro-reel-echo-tape-simulator-pedal) in this image. You can confirm that this is Russell's board by checking out this [overhead](http://cdn.pastemagazine.com/www/blogs/1000words/2011/09/26/P1012322.jpg) shot of the same basic layout.more
I love this thing so much! It's hard to describe how it differs from the standard Big Muff; the fuzz is a little less thick (I mean that in the best way possible!). Just go look it up. The circuit in this thing is apparently nearly identical to the Bass Big Muff.
I use it to pretend to be Dan Auerbach...it's surprisingly versatile for other sounds/styles, though!
This unit's in & out jacks, the easily-loosened tri-pole switch, and the curved shell without interior support make it unreliable under solid stomping. The sound, however, is as good as the legend is inspired.
I modified this fuzz by replacing a transistor or two with some from a 1969 Fuzz Face and it sounds like a freight train off the tracks with my Les Paul's 59 Standard Humbuckers. Its an incredible sound, i defy anyone to have a better fuzz sound than I do.