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Denon (株式会社デノン, Kabushiki Gaisha Denon) is a Japanese electronics company dealing with audio equipment. The Denon brand came from a merger of Denki Onkyo (not to be confused with the other Onkyo ) and others in 1939, but it originally started as Nippon Chikuonki Shoukai in 1910 by Frederick Whitney Horn, an American entrepreneur.
Onkyo Corporation (オンキヨー株式会社, Onkyō Kabushiki-gaisha) is a Japanese consumer electronics company, [1] specializing in premium home cinema and audio equipment, including AV receivers, surround sound speakers and portable devices.
D+M Group, formerly known as DMGlobal and D&M Holdings, is a Japanese corporation that owned several audio and video brands. It was formed in 2002 from the merger of Denon and Marantz.
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Headphones that use cables typically have either a 1 ⁄ 4 inch (6.4 mm) or 1 ⁄ 8 inch (3.2 mm) phone jack for plugging the headphones into the audio source. Some headphones are wireless, using Bluetooth connectivity to receive the audio signal by radio waves from source devices like cellphones and digital players. [ 5 ]
For instance, if a radio wave passing a given location has a flux of 1 pW / m 2 (10 −12 Watts per square meter) and an antenna has an effective area of 12 m 2, then the antenna would deliver 12 pW of RF power to the receiver (30 microvolts RMS at 75 ohms). Since the receiving antenna is not equally sensitive to signals received from all ...
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
Vivant Denon with Jean Pesne's engraved Oeuvres de Nicolas Poussin, portrait by Robert Lefèvre (Musée National du Château de Versailles). Vivant Denon was born in Givry, near Chalon-sur-Saône [3] to a family called "de Non", of the "petite noblesse" or gentry, and until the French Revolution signed himself as "le chevalier de Non". [4]