Lin, welcome. Note that the maximum power rating of a speaker supposedly is the amount of power it could take continuously without going up in smoke; it has nothing to do with the amount of power it uses from the receiver at any given moment(which most of the time is about 1 watt). So, even a speaker with a 500 watt maximum rating doesn't necessarily create any sort of problem for an 80 watt receiver. As Rick mentioned, forget the bi-wiring, which is of no significant benefit, and simply connect your regular single length of lampcord to one set of terminals.
