With the Galileo, the front end of a Vox AC30 is available with a precision-tuned Rangemaster circuit to mix the perfect Brian May tone cocktail. Since the preamp circuit of the AC30 is intact within the Galileo (with JFET’s instead of tubes) and because a precision-engineered Rangemaster-style circuit hits an actual AC30 preamp, this IS the Brian May tone. The pedal behaves just like an amp, replete with all the complexities of the marriage. Your guitar’s volume knob essentially acts as the fourth knob on the unit, as it’s much more interactive with the Galileo than any other pedal. There’s an amazing range to be found with starving the front end of output.