Ahhhh lucky you with a DA50. Go ahead make us all druel....You must have bought it used, no manuel. The 4 posts are for the WONDERFUL option of biwiring, I'm sure of it. Or is it as Jay says 4 or 8 ohm option which is also quite a perk.
? Not sure really.
Hows the bass? Mids? Highs?
Speaker? cdp?
btw I wouldn't spend alot on speaker cables. I use Home Depot monster copper wire, $1.50 ft, works perfectly fine. In fact radio shaks regular wire is just as good. Goes for interconnects as well. Rat shaks cheapo's are all I need. i was sucked into buying a used Zen pair of interconnects at $250.
EDIT: Just looked at the Jadis web page, like all Jadis amps (except the 300B) the DA50 will accept any impedance loads, 1-16. Jadis quality. So the double posts are for the phenomenal option of biwiring.
I could use something like that as my speakers are double posts. MY JOR has single posts.