Best speaker cable for B&W?

I use a pair of Blue Circle BiWire BC92 in my main system, but these are also $500 new and $300 used. Great cable for the money.

I used monster M series on my B&W 801 and they were ok but i upgaded to b/wire Audiotruth- Midnight3(lows) and Argent(silver highs)and enjoyed a major upgrade. good luck

For that price try some used DH Labs T-14 biwires or a biwire pair of JPS Labs Ultraconductors. I personally preferred the Ultraconductors. Good luck!

has anyone try harmoic techonolgy speaker cable for bw speaker ?

Squiddy:

At the price you are looking to purchase these things for you would be MUCH better served by a run of copper alarm wire, say in the 18 AWG range. If you can get some CAT 5 teflon insulated stuff, it will work really well - just make sure it's all solid core - stranded wire is just plain crippled by all sorts of nasty problems. Because you're running a short length the resistance of the wire itself shouldn't upset your amp's damping factor - all the control you need for the woof will be there.

Considering your budget and what is available in the audio realm to meet your budget, you will be way better off following my advice - it's super cheap to try, so if it doesn't work out... buy something else.