This is a model that emulates the popular Mesa/Boogie Rectifier. I have a Triple Rectifier and the distortion is almost indistinguishable. It can produce a wide range of distortion, from crunch to extreme distortion, with a wide gain range. You can also increase the gain further by partially inserting the plug. I had it set up in a switcher, so I didn't step on it directly, and it was stored after being removed, so it's in good condition. I'm selling it to organize my equipment.