This 46” largest premium LCD TV is the first of its kind using "LED BLACK" lighting with the highest color reproduction. As a built-in DTV, it boasts of high-resolution digital POD characterized by the best sound quality that comes from the waterfall speaker and "SRS TruSurround" system. M5 features a waterfall-structured, hidden speaker system wherein the horn is installed in the open space of the rear bottom and sound is emitted through the openings of the bezel and sound mirror. As an innovation of the typical TV model, the proposed hidden speaker was developed and adopted after careful review of the possibilities by the sound engineer. Expectation and curiosity about the sound coming from an invisible speaker render a sense of mystery to the product.