Spoke to someone at Crutchfield yesterday, they are dual wired since the factory speakers came with 2 coils. With the speakers these days having only one coil, I will only need to hook up 2 of the 4 leads. The lead I do not use can just be disconnected at the plug (good thing I had the sense to re-wire the leads with plugs instead of not using them). I went for a set of Infinity speakers this time around and I sure do hope they last longer than the prior ones.