Bi-wire cable versus 2 sets of cable

First you should always bi-wire if speakers have that capability, even if you have only one amp with one set of 5-way posts, use spades for one pair and bannanas for other. Internal bi-wire is the most cost effective and better than single wire, but it is a compromise to save money. High and low frequencies cannot be completely isolated in a single cable. If money is no object double runs are preferable to internal bi-wire, you can reduce the cost of double runs by using highest quality cable for high freq dirvers and lower quality cable for bass drivers, as bass is never bright and will have less detail loss. (cables must be same design family to do this) For example use AQ Clear for high freq and AQ Midnight for bass........regards Sam

Thtman the "main" reason for bi-wire is not to lower resistance, but to reduce distortion in treble and midrange. The high freq cable no longer has to handle magnetic fields caused by the higher current needed to produce bass signal. This is also why double run is preferable to internal bi-wire as it better isolates high freq from distortion. Best of all worlds is bi-amp and bi-wire set-up. Avguy also makes good point that speaker cables should in general be kept reasonably short.