The Diablo GH offers exceptional dynamic qualities and super-clear, warm tone in a precisely adjustable 2-in-1 Overdrive and Boost pedal.Unlike many other overdrives it works perfectly with clean amps.The GH model is based on the classic Diablo but comes with a few tweaks and a set of new controls that affect the "feel" of the pedal, the way how it reacts to your playing.- DYN(AMIC) adjusts the internal voltage from about 6 to 18 volts.Increasing the headroom results in less compression, tighter bass and more punch.- FEED controls low frequencies in the input signal allowing tight and transparent sounds even with the fattest sounding neck pickups.- BODY control is a bit different from the regular Diablo, adds low mids in the first gain stage for thick, singing lead sounds.- INPUT 3-position-miniswitch sets the sensitivity of the input gain stage for best interaction with your guitars. Just try and find your favorite setting.- MIDS changes frequencies in the tone control. Perfect for matching pedal and amp tone.- The BOOST section is a completely independent circuit and is located AFTER the DRIVE.- BOOST knob is the master volume (gain is set fixed), TONE controls treble content of the boosted signal. Dial back for sweet boosted lead sounds.