The 9887 can't really control the H701 and while you could sort of do what you are looking at you'd really be better off not doing it that way. If you want to run 8's get the H701 first and don't mix them with an off the shelf comp set. Having an 8 play with a 6.5 makes no sense at all. I would also expect your 8's to play a much shallower range. 40-200 or so as you really want the midrange to do its job, which of course that big 6.5 can't. Not sure your end goals, but I would recommend rethinking it a bit. What locations? Type of car? Music choice, equipment tastes, listening preferences, install space, budget...give us some background.