Designed specifically for 7-string guitars with the input from some of Ibanez hottest 7-string players, the SH7 Seventh Heaven distortion pedal accentuates the low-end girth of the 7-string while reducing unwanted string noise. A special mode switch allows you to choose between two different distortion voicings while Lo, Hi, Drive, and Level knobs give you total tone control. An absolute must-have effect for replicating the best 7-string sounds of others or creating your own individual tones. That is what is written on Ibanez' site. And it is the best distorition-pedal I've ever tried. It let me play all the low things I want to. It is just amazing.