Drew, cables are important in that their total absence has a drastic effect on sound quality, but once competently made cables(available at very low prices)are used, there's nothing else that can be accomplished. Considering shipping charges, probably the most cost-effective source for speaker wire is to pick it up locally at Home Depot, Lowe's etc. Connecting cables are available at reasonable cost from sources such as MonoPrice, already linked, or Total Signal .

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Enjoy the music, not the equipment.