Cusack Music Screamer Overdrive v2 The pedal that started it all! Yes, it is based on the classic Tube Screamer circuit, but its much more than that. The Cusack Screamer is a clean overdrive, but has about twice the gain of a typical Tube Screamer. Hey, whats that toggle for? That is the Clip Selector, which allows you to select either the Standard, Crushed, or Asymmetrical LED clipping! New LED Clip-O-Meter! Thats right boys and girls, you can SEE your guitar clipping!