When they got the idea for this pedal Catalinbread were trying to create a powerful bass overdrive based on the Ampeg flip-top style amplifier. THough during production of the SFT they realized that it works great for bass and guitar tones especially when you drop tune your favourite 6 string. All four of the controls do as you would expect being labeled Gain, Volume, Treble and Bass so you can instantly pick it up and get playing. Although it is known for being able to fill even the biggest mixes with high gain wonder turning down the gain produces a really nice subtle overdrive that many will love. And heck while were at it, it would be really cool if it worked for the more modern drop tuned heavy stuff too. Made sense since those tones were due in large part to guitars being played through amps designed for bass, right?