Single vs Bi-wire Speaker Cable

I've found bi-wire to sound better with my speakers (B&W 802D's) than jumper(s). 

Thanks to everyone who replied. The comments/suggestions were very helpful and informative. I pulled the trigger today, and purchased two full-range speaker cable pairs (1) the AQ Robin Hoods and (2) AQ Thunderbirds, a step-up from the William Tells. Will try them both, and will return one.

One additional question has come up, based upon a couple responses. Several folks suggested I should connect the speaker cables to the bass speaker posts, and then jumper to the treble posts. AQ's US retail price book, on page 23, suggests the opposite, for 3 way speakers (I have B&W 802/D2's). Thoughts?

I am using the William Tell bi wire combo with my B&W 802D3’s. Sound is wonderful.

OP: With the 802D's I believe they suggest to run the wire to the bottom jacks, then jumper(s) to the top jacks. Since you have both pairs... try biwire with the tells on top to see if it improves the sound after trying them individually with jumpers.  

Also have found tip top jumpers is all yah need. (All I do)  I have tried connecting to treble and base and can’t tell any difference. 

A while back there was much to do about doubling up on speaker wires. ( double sets/runs) Not sure where that landed. Bueller? Bueller?

Happy Ike Quebec’s birthday y’all.