I'm mostly just curious why yours is adding some hiss, even if minimal, and mine doesn't seem to. I don't have an Alchemist, so I can't say if it's something there, although I doubt it. One of my friends has one, so I'll have to bring along my TF next time I see him. In any case, in my setup, multiple Factors don't cause any additional noise. I hope you find this to be the case, too, if you decide to add another.