I haven't bought a speaker cable for a long time, and in general it was then that I bought Monster XP. After some research, it turned out that Copper Clad Aluminum (CCA) has now become the standard as the price of copper has risen sharply. I don't think CCA will affect any properties of the sound, but wiser people than me have suggested raising the thermometer to keep capacitance at apple-to-apple levels. I settled on something high quality but basic pure copper and it fit the bill. The only complaint I have is that the jacket is not as soft and supple as I would like, but overall a very good wire.
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