Compared to the dynamic germanium Fuzz Face, silicon versions sometimes come off as brutish. And even though they can be sonorously vicious, if dirty-to-clean range and sensitivity to guitar volume attenuation are top priorities, germanium is probably the way to go. The McGregor Classic Fuzz, however, offers ample reminders about the many ways silicon Fuzz Faces can be beastly, sensitive, and sound supreme.