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Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...
The other Zenith subsidiary in Chicago was Central Electronics, Incorporated, located at 1247 West Belmont Ave., where 100 employees made amateur radio equipment and performed auditory training. Another Central Electronics plant was located at State Route 133 and Grandview in Paris, Illinois , where 500 employees made radio receivers, with the ...
The former Jensen Radio Manufacturing Company was founded in 1927 by Peter Laurits Jensen, the co-inventor of the first loudspeaker, in Chicago, Illinois.The company gained popularity in its early years, rising to its peak in the mid 1940s when Jensen speakers were selected to be used in the first production of a guitar amplifier by Fender Musical Instruments Corporation.
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The transformer is almost always specific to a particular electrostatic speaker. To date, Acoustat and Beveridge built the only commercial "transformer-less" electrostatic loudspeaker. [ citation needed ] In this design, the audio signal is applied directly to the stators from a built-in high-voltage valve amplifier (as valves are also high ...
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The 552 was designed to work with an external PSU with an 800VA toroidal transformer that Naim says has enough capacity to supply a 300–400 W power amplifier. [25] As at April 2013, Naim have a range of six pre-amplifiers at various price points between £1,050 and £18,250. [49]
A 120:120 instrument isolation transformer showing two polarity marking conventions. Voltage transformers (VT), also called potential transformers (PT), are a parallel-connected type of instrument transformer. They are designed to present a negligible load to the supply being measured and have an accurate voltage ratio and phase relationship to ...