Update: the pedal is fine in a live situation. In studio (or any other environment that requires the cleanest signal with as little background noise as possible) I found that having a pedal that can slightly reduce the output gain AFTER the Grand Canyon and BEFORE the amp completely solves the problem. I have a stereo setup and the last pedal in the chain is the Lehle Dual, which has separate gain controls for both channels. Reducing the gain in the Dual magically gets rid of the hiss. It’s been a total honeymoon with the Grand Canyon after discovering this trick!