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.
this was the first big muff I ever owned circa '96.... I gutted mine and built another effect into the box. I had the intact and function PCB in the wooden box for a long time and recently I took it out and housed it in a spare box... plugged her in and Is till hate this pedal. This is one of the worst sounding muffs. I've realized I don't actually like big muffs, but even going past that distaste these black Russian muffs sound like ass.
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.