bi-amp bi-wiring using the dual zones on receiver

Can I use the A and B zones on my NAD T753 receiver to bi-amplify a pair of Linn Index speakers (A zone will go to the low freq and B zone will go to the high)? I guess I can use also one zone for bi-wiring - connect the low and the high to zone A with to different cables? Will I see any significant improvement in the sound with the equipment mentioned?
The dual zones are only to drive different pairs of speakers.
As you described connection of A to high and B to low will only probably decrease an output resistance. If the output devices good power supply and current reserve, it will give you a possibility to drive a speaker with low impedance.