Yes, sorry, amplifier.
So your controller is in the attic? My attic is insulated, but accessible. The only electrical wiring that I would have to avoid is the two power outlets for the garage opener. But I have some CAT 6 shield yet left over, so I could do that. Still have the amp near the antennas, but put them up in the attic and farther away from the electrical panel.
I do know I have one dimmer light in the dining room that messes with the E Field, but I haven't found anything in particular that is causing my H Field issues. Since it is one channel and fairly consistent, I'm guessing it's one source. I suspect it's actually not in the house even. I've turned off a bunch of the circuits in my house trying to track it down and can't. Not all circuits, but most. So that's why I'm hoping to move the H Field portion to a quieter part of the garage.