I would not try to power passive subwoofer a long with a pair of speakers at the same time with an Accuphase E-202. I know it is a pretty powerful quality amp but that is a lot to ask for the Accuphase to power all that. I agree with Brf. Get a self powered subwoofer and connect the preamp output from the E202 to the sub. There are lots of ways to hook up a sub to the E-202 with your speaker set.
Good luck.
Good luck.