David, a simple rule of thumb is that doubling the size of the conductore takes you down three wire gauge sizes. In other words, two 16 gauge wires run in parallel = 13 gauge. In order to go measurably heavier than this, you would need four 16 gauge wires. Since two of the 16's equals 13 gauge, we are in effect doubling that amount again ( 2 + 2 ) to come up with 10 gauge. This is a generic rule of thumb. As to specific wire gauges for individual drivers, it is sometimes not the actual gauge that matters most but the materials used and the geometry of the overall design. While a larger gauge does offer less resistance which is very critical on a real long run, heavier wires typically tend to roll-off or smear high frequency information. Running heavy wires like this side by side ala standard Monster type zip cable will result in a MEASURABLE roll of of upper mid and treble output. That is why many manufacturers have gone to using several very small gauge wires routed in parallel. Kimber, Audioquest, Axon, YBA, etc.. all do this with individually insulated cables in various geometries. These are designed to produce the flattest and widest bandwidth carrier that they can. Of course there are those that go the opposite route like Goertz, Analysis Plus, etc... that use different geometries and try to give the most surface area possible. Some will say that there is a difference in solid and stranded wire and i am one of those folks. In MOST cases, i prefer to use solid wire whenever possible. Your question touches upon one of the most volatile subjects around though, so expect to get some answers that will contradict each other. For more info about speaker cables, take a look at what Nelson Pass had to say when he took measurements of several older designs. You can find this detailed testing on the Pass Labs website listed under "articles". Hope this helps. Sean >