Originally Posted by
Sage
Okay, so I just wired up the backplate and tried it out. It's definitely different from a dummy coil because the circuit board that comes with it has two potentiometers for calibration. You wire the grounds of the pickups directly into this thing and then calibrate the dummy coil in the backplate against them. It does a good job of taking out the hum.
Unfortunately, there is indeed a cut in high frequencies. You can hear it in the attack. After playing around with it for a little while, I've taken it back off. I think I'd rather use a noise gate instead, for now.