No; the vpep350 is to be used only with the M50s. They get connected "between" the speaker-out terminals in the back of each M50. The jumpers shown in the back of the M50s are to be removed unless the vpep350 is used, then the proprietary, patent applied for, impedence matching, jumpers are installed.
It garners a hybrid "Phantom-Greater Dispersion" sound.
The jumpers were originally designed to be used to add an additional x-over to be able to add a remote 5.25 mid, time matching turned out to be unobtainable however, so the new center was developed.
