Low-Frequency Subwoofer Audio Interconnect Connect amplifiers, receivers, soundbars, and AVRs to a broad range of subwoofers with this AudioQuest Black Lab RCA subwoofer cable. Solid Long-Grain Copper(LGC) conductors minimize distortion, Foamed-Polyethylene preserves dynamic contrasts, and a Metal-Layer Noise-Dissipation efficiently dissipates high-frequency noise. The result is clearer, naturally beautiful music, intelligible dialog, and thrilling sound effects.