Review on KabelDirekt – 15ft RCA Subwoofer Cable & Cord – (1 RCA Male to 1 RCA Male, Audio Video Cable, Digital & Analog, Double Shielded – Ideal for subwoofers, AV receivers, Hi-Fi, Black) by Broderick Shetler

Works as advertised, fairly good quality overall. Wire gauge and jacket could be a bit thicker, but to me it crosses power wires (perpendicularly, of course) without noticeable interference for 20 feet, so that's a pretty good indication of proper shielding. I'm using this cable for an LFE subwoofer, but fidelity seems good even with bass-heavy music. Also, as I work with A/V gear, I'm used to heavy-duty A/V cables, but this is a good consumer product at a good price. There's no reason to spend more, unless you're looking for a mobile cable (e.g. a robust jacket for audio and video equipment that booms a lot), you get oxygen-free copper wire with apparently good shielding. (important if you're working near power cords), gold-plated connectors (not a big deal for the connection, but will prevent oxidation), and seemingly well-mated connectors.