High Gain Amp Model Feedback in Helix Posted June 28, 2017 With respect, not in my experience. With a dual rec, if you're on Ch. 3 Modern, with the tube bias set as "silicon diode" playing on a guitar with EMGs, look out. It's got bite, very, very tight low end. EMGs usually tighten up everything, but I just don't have that experience here. That's why most high gain amps are good with EMG's on their own, without the use of a dirt pedal that takes away from the warmth and makes the sound tinny.