Bass effects - Electro Harmonix Russian Big Muff (modded) 

A black Russian Big Muff from the later years of manufacture. This one was modded by Moho Mods (now disappeared?) with better components, a proper power input and, most importantly, a cool green LED!
The Big Muff is a great fuzz for bass as it has so much low end, however the lack of mids can sometimes make it a bit too mushy in the mix.
Pardon the crackly pots, this one hasn’t been out for a while and probably needs a bit of a clean...