Here's my review of 73 Ram's Head from Vick Audio. Based on the classic Big Muff circuit this one's got an additional toggle switch for three different EQ modes: scooped (classic), flat and boost. I'm using a Fender Strat with EMG DG20 pickups into a Fender Blues Jr. Reverb and delays added in Logic. See the full review on www.gilmourish.Com