quadraphonics
(ˌkwɒdrəˈfɒnɪks) or quadrophonics
n (Electronics) (functioning as singular) a system of sound recording and reproduction that uses four independent loudspeakers to give directional sources of sound. The speakers are fed by four separate amplified signals
Also called: quadrasonics ˌquadraˈphonic, ˌquadroˈphonic adj
quadraphony, quadrophony n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014