It has a old school voice but not as smooth as EFE Dope Priest or Rams Head, a bit more bite and bass, quite boomy. Tonestack is quite versatile, it's configurated as in Musket Fuzz although the component values is completely different. I really dig the LED's for clippers and with the Doom swith closed, it gets a throaty aggressive grind. lot's of sounds to be had. I really like but I might lower input cap from 1uF to something like 100nF cause it's a bit flabby at times according to my subjective, damaged ears.