Would always TRY bi-wiring speakers to see if a difference can be
heard. I do not believe that a blanket statement of bi-wiring makes no
difference or bi-wiring will always sound better us true. I believe
that like most things in a home cinema set-up its depends on all sorts
of factors not limited to but including the type of cable, speakers,
amp and room layout.

Even just running twice the cables between sets of single terminals will
improve the sound due to the halving of the cable resistance and increase in
system damping factor.

My speakers are biwired, as the sub is currently on a passive x/over so I
don't want that crossover in line with my tweeters. There is a marked
difference in quality this way. Running without the sub there is a minimal
but noticable difference.