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Electro-Voice (EV) is an American manufacturer of audio equipment, including microphones, amplifiers, and loudspeakers, focused on pro audio applications such as sound reinforcement and commercial and residential audiovisual installations.
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.
The Electro-Voice RE20 is an American professional cardioid dynamic microphone, commonly used in broadcasting applications since 1968. Designed by Electro-Voice using the company's patented Variable-D technology and a large-diaphragm element, it has been described as an industry standard "iconic" microphone for its natural sound and its wide ...
The first of these were basic systems with relatively poor performance developed by Electro-Voice (EV-4/Stereo-4) and Dynaco (Dynaquad (DY)). A so-called matrix format, it utilized four sound channels which were encoded into two stereo album tracks. These were then decoded into the original four sound channels.
Directly after graduating UW-Madison, Gunness obtained a research and development position in the engineering department at the Electro-Voice (EV) factory in Michigan. Under Chief Engineer Ray Newman, Gunness worked on loudspeaker design, combining traditional empirical R&D methodologies with the emerging capabilities of computer analysis. [ 1 ]
"The moment I started drinking too much was when I started writing music in 2016 and it was making me go to places and feel sorry for myself," she says
In the 1950s and 1960s, circlotrons were produced by Electro-Voice (eight models, 15 to 100 watts per channel), Finnish Voima and Philips. [2] These inspired other local manufacturers, such as Carad. All these models employed output transformers and beam tetrode or pentode tubes (for increased efficiency).
Type. Fixed period. Adjustment frequency. What this means. 5/1 ARM. 5 years. Once per year. Rate locked for 5 years, then adjusts every 12 months. 7/6 ARM. 7 years
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