Power conditioning has become a widely accepted upgrade in home theater installations, yet most power cords are still unshielded and other power line noise problems remain. For example, harmonics of the power frequency, which are sometimes severe enough to make transformers hum, usually show up as ripples in the DC output of component power supplies, resulting in compressed and muddy sound. The Fluxfield design of Wireworld shielded power cables addresses these problems and our power distribution systems are designed to extend the benefits of Wireworld power cords. The result is distinctly cleaner and more dynamic sound and video. Amazingly, humming transformers become quieter.