potboyslim:
Active is the way forward for you then!
Honestly, buy a much better single run of speaker cable, then cut a bit off for going between the hf and lf terminals. You will get a better sound this way than a cheaper biwire cable.
Dont agree with that Ptboy
I have found that some speakers (mainly Monitor Audio) do sound better with a decent run of cable to the LF connections with decent speaker cable jumpers in place (or even the 2-4 cable set-up) but B&W speakers have sounded better to me when bi-wired and obviously bi-amped
If the OP feels that bi-wiring his Mezzo's has proved better than yes; speaker A connections to the HF on the speakers and the Speaker B connections to the LF on the speakers.
However you could just go for the bi-wire cable and get it in a 2-4 set-up so your amp is only using one set of speaker outputs but youre connecting to all 4 terminals on the speakers (remeber to remove the OEM speaker jumper bars though)!