Hi Dale,
I think I know what you are trying to do, to get equal voltages out of each sensor? but I dont think it matters. The ABS computer compares wheel rpm based on frequency or pulses from the sensor, not voltage. The voltage produced is not important.
While the voltage may change with speed, or by adjusting the air gap, this is not measured by the ABS computer. It's counting peaks and troughs, like on and offs.