TX Audio is an American consumer audio company that manufactures sound equipment for applications including car audio, home audio, marine audio and live sound products. They are best known for their car audio products and they specialize in subwoofers and subwoofer amplifiers. MTX Audio is a brand name owned by the Mitek Corporation. MTX Audio\'s parent company, Mitek Corporation, patented the square speaker design, which has more surface area for its nominal diameter as it is not measured diagonally. The patent was filed and published in 2007.