Bi-amping

Yes, just use one set of cables per speaker and a jumper between the positive pair and between the negative pair terminals. No need for a more expensive bi-wire cable. 

No need for any fancy jumpers! A few inches of copper wire will do just fine. That's what I use on my Snell Type A's.

@393gadget there is a big difference between bi-amping and going active, which is what has been discussed.. Bi-amping involves leaving the crossovers in tact and feeding each leg separately, going active involves removing the crossovers and having that function take place between the preamp and power amps. 

Pre 8 is the best way to achieve this.

Passive bi- amping can be achieved before the amps, given the right speakers. Marchant makes a passive line level crossover for this.