One of the most iconic distortion pedals out there is the ProCo RAT, it shaped music as we know it and as such, many pedal builders out there came out with their clone or version of a RAT based pedal. The op-amp powered Flatiron by Electro-Harmonix is exactly that. EHX took the time to research and build their version of the RAT 2 and if you ask them, they are confident that their Flatiron surpasses the original. This symmetrical fuzz/distortion features a simple, three control layout. While Volume and Drive are self explanatory, the Filter knob is somewhat unique to the circuit and acts as a low pass filter. How does it compare to the classic RAT you ask? load both to the player and hear for yourself.