Does the manual state the minimum impedence for speakers played at the same time? I suspect that the impedences will be missmatched for the high and lows and the power transfer not ideal. I would hook up both wires to the one output to be sure.
Bi-wiring using both speaker 1 and 2 outputs
I have a McIntosh MA6450 integrated amp. The amp supports two pairs of speakers and allows both pairs to be on at the same time. Currently, I am using this feature for bi-wiring purpose. That is, I connect one pair of cables from "speaker 1" to the low-frequency posts and another pair of cables from "speaker 2" to the hi-frequency posts. It works fine. Are there any protential problems with this kind of wiring?