Definition of "quadraphonic" []

• Of or for a four-channel sound system in which speakers are positioned at all four corners of the listening space, reproducing signals that are independent of each other. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I even remember standing in a music store in the Twin Cities in about 1970 listening to “Whole Lotta Love” from Led Zeppelin II [1] speed around me on the latest technological breakthrough, quadraphonic stereo."
• "I even remember standing in a music store in the Twin Cities in about 1970 listening to “Whole Lotta Love” from Led Zeppelin II speed around me on the latest technological breakthrough, quadraphonic stereo."
• "The Xplore Wrangler certainly feels authentic on the highway, with quadraphonic tire roar blasting from the BFGs' deep treads and a serious lack of top speed, thanks to the vehicle's aerodynamics."