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In the early 1970s, EV developed the first commercial system for matrix four channel stereo called Stereo-4. When Columbia/CBS and Sony developed their Stereo Quadraphonic system that system became the leading matrix system. Electro-Voice then adapted their decoders so they also could play SQ records as well as Sansui's QS records. The EV ...
PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy Rectilinear Research Corporation: United States Rega Research: United Kingdom Renkus-Heinz: United States ReVox: Switzerland ...
Stereo-4, also known as EV (from Electro-Voice) or EV-4, was a matrix 4-channel quadraphonic sound system developed in 1970 by Leonard Feldman and Jon Fixler. [1]The system was heavily promoted by RadioShack stores in the United States, and some record companies released LP albums encoded in this format.
A tweeter or treble speaker is a special type of loudspeaker (usually dome, inverse dome or horn-type) that is designed to produce high audio frequencies, typically up to 100 kHz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs , after which low-frequency ...
An example of a large concert subwoofer enclosure is the 1980s-era Electro-Voice MT-4 "Bass Cube" system, which used four 18-inch (45 cm) drivers. An example of a subwoofer that uses a bass horn is the Bassmaxx B-Two, which loads an 18-inch (45 cm) driver onto an 11-foot (3.4 m) long folded horn. [ 51 ]
The portable audio products sold by Bose Corporation have been marketed as portable smart speaker and SoundLink. These wireless speaker systems are battery powered and play audio over a wireless connection from a separate source device (such as a computer or smartphone). Most Soundlink models use Bluetooth to communicate with the source device.