No bi-amping just using an Audio Research Reference 75SE for both runs.
In regard to the jumpers I used high grade Audioquest as well as some top line Kimber and Nordost jumpers. Costs, over $1,000AUD.
The maker of the speakers, Colin Whatmough, always believed his would perform better if you used tri or bi-wired cables.
He also recommended bi/tri amplification as a further improvement.