How to get the most out of Jadis DA50S?


I found out that there are eight speaker binding post (two blacks and two reds at each side). How must I connect? My pair of speakers have only one black and one red behind each.

Pls help, I'm going to buy speaker cable today.
audiostax
Regarding impedance adjustments in jadis them are internal adjusments. At least on the ja-30, 80's and se-300b.
For those that have had a chance to hear the 30 and 50, what difference do you find? The fact that the 30 accepts EL34s and KT88s seems to be a bid selling point to me. The 50 seems to weigh quite a bit more, I assume bigger trannies - how does that translate into sound. I have had an Ars Sonum with my Merlin VSM, but the Jadis has always caught my eye and I'm looking for my last integrated; Jadis owners seems to stay owners for a long time.