My take on ALNICO & PM drivers; The VC AC flux modulates the PM maginetic field which causes back EMF and higher distortion levels...non-linear maginetic flux...



My take on Field coil drivers; Back EMF in the field coil due to modulation of the Field coil magnet would be minimized as these currents would be shunted through the Field coil power supply....



My conclusion is that a Field coil driver should sound better..... But JBL came up with a
mod for PM drivers, A shorted turn to shunt the back EMF and reduce non linear flux ....This would be an interesting research project.....................My 2 cents......GC