Our flat HDMI® cables are unique and proprietary, because the 'copycat' flat HDMI® cables from other manufacturers simply have twisted conductors with a single drain wire per shielded pair Original WireWorld HDMI® cables feature Symmetricon™ ; or DNA Helix™ ; design, which reduces attenuation and provides greater impedance uniformity WireWorld's patented DNA™ ; speaker cables are especially suited to Home Cinema installations because our unique cable design and premium materials preserve fidelity over long cable runs compared with conventional or generic cables