Low-Frequency Subwoofer Audio Interconnect Connect amplifiers, receivers, soundbars, and AVRs to a broad range of subwoofers with this AudioQuest Boxer RCA subwoofer cable. Solid 1.25% Silver conductors minimize distortion, Polyethylene Air-Tubes preserves dynamic contrasts, and a Carbon-Based Noise-Dissipation efficiently dissipates high-frequency noise. The result is clearer, naturally beautiful music, intelligible dialog, and thrilling sound effects.