"Just when you thought you had seen the strangest name for a stompbox, EMMA offers up the Reezafratzitz! Like it's unconventional handle, the RF-1 is a unique type of OD/Distortion unit that stands out in an extremely crowded playing field. The RF-1 offers incredibly rich, full-bodied crunch that is so close to tube-amp overdrive that you''d be hard pressed to choose which was which. The secret to the RF-1's amazing tone lies in it's Bias control. This knob allows the user to morph between Class B and Class A biasing, altering the harmonic structure of the signal and providing a much wider variety of tonal options than your standard distortion.
In Class B mode, the RF-1 exhibits a thick, chunky grind similar to a Marshall or Fender amp. Class A mode provides sweet, singing saturation worthy of the finest Vox AC30. Additional controls for Level, Gain, and a Hi Boost/Hi Cut Tone circuit allow the user to fine tune the RF-1 to taste. When you're ready to set trends rather than follow them, the Reezafratzitz will provide the audio inspiration you need to set yourself apart!"
Maybe ClausH knows more about this.
"The whole point of diy is diy. It's not dsoiyathodtr - do some of it yourself and then have others do the rest" (paulc)