All I can say is wow. I keep trying it on and/off, clean, distorted, with a lot of gain, mid gain, etc. If it sucks tone or changes the sound of my amp, I can't hear it. Yes, I know that clean power, good cables, etc., help with noise. However, if you use high gain amps and play with a lot of gain, which I do (and love to do!), there will be noise. There is no way around it. This unit is amazing, worth every penny. Just thought I'd share!