I agree with Ivan that it would most likely be best to keep the biwired speaker cables separated from each other. They are conducting different currents and different frequencies. Twisting them together can only increase interaction between those currents, which biwiring is intended to reduce.
In saying that, I do not completely rule out the possibility that twisting them together might be subjectively preferable, but if it were I suspect it would be because of the introduction of colorations that are complementary to the sonics of the rest of the system.
Close spacing or twisting of + and - conductors that are carrying the same signal, btw, is a completely different story, and is often desirable because it reduces inductance.
Best regards,
-- Al
In saying that, I do not completely rule out the possibility that twisting them together might be subjectively preferable, but if it were I suspect it would be because of the introduction of colorations that are complementary to the sonics of the rest of the system.
Close spacing or twisting of + and - conductors that are carrying the same signal, btw, is a completely different story, and is often desirable because it reduces inductance.
Best regards,
-- Al