THX Ultra is the A/V equivalent of the Good Housekeeping Seal of Approval. This label appears only on products that meet or exceed a stringent set of technical standards, established by engineers at world-renowned Lucasfilm Ltd. - notably responsible for the Star Wars films. The wire used in large quantities in home theater to connect components can be subject to frequency response and noise problems if not designed and constructed properly. Monster ULT I1000DCX-4 is built to the most exacting specifications, ensuring the broadest bandwidth and most uncolored signal that's technically possible. To quote George Lucas: "The combination of THX and 5.1 digital sound is the absolute assurance that consumers can now experience the finest sound reproduction from their Home Theater." Best of the best - it doesn't get any better than this!