My Onkyo 876 also allows this. I can also "bridge" the two channels for greater power (alas, the speaker must be 8 ohms -sorry Thiels).
Your speaker's crossover will pass only the frequencies the tweeter can handle (assuming your speaker came with the bi-wire terminals connected (some kind of metal strap or jumper wires?).
Your speaker's crossover will pass only the frequencies the tweeter can handle (assuming your speaker came with the bi-wire terminals connected (some kind of metal strap or jumper wires?).