Source Audio Aftershock Bass DistortionGet down and dirty with the AfterShock Bass Distortion. The AfterShock packs three bass distortion circuits that span the gamut of low end crunch, from smooth and natural overdrive to full on fuzz attack. The Tube circuit belts out a subtle, but powerful vintage tube overdrive with a nice smooth breakup and plenty of punch. Heavy offers intense germanium fuzz tones with loads of bottom and mucho grit. Fuzz slams your tone with zipper like gated fuzz,