The larger the copper wire the better. The suggestion for 12 ga magnet wire is excellent. You can use Romex 12/2 if you have it around. Insulation is not an issue, size of copper wire is and your only limit is the binding posts. Use 10/2 romex if it will fit.
Need advise choosing speaker wire
I just purchased a pair of B&W 802D's. I use a Bryston 14bsst solid state amp and a deHavilland Ultraverve tube preamp. I have a Wadia 302 for my music source. I am in a huge quandry as to what speaker wires to buy...there are hundreds out there. I would like to bi-wire the B&W's. I guess I am looking for the cleanest, non-colored path to the speakers as I very much enjoy the Bryston-deHavilland combo. I really don't want to further "color" my signal with speaker wires as much as I can help it. Thanks for the help, Jim