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2. Marantz - Wikipedia

   en.wikipedia.org/wiki/Marantz

   Marantz is a company that develops and sells high-end audio products. [2] The company was founded in New York, but is now based in California. The first Marantz audio product was designed and built by Saul Marantz in his home in Kew Gardens, New York. [3]

3. Stereophonic sound - Wikipedia

   en.wikipedia.org/wiki/Stereophonic_sound

   In common usage, a "stereo" is a two-channel sound reproduction system, and a "stereo recording" is a two-channel recording. This is cause for much confusion, since five (or more)-channel home theater systems are not popularly described as "stereo", but instead as "surround". [clarification needed (see talk)]

4. Negative-feedback amplifier - Wikipedia

   en.wikipedia.org/wiki/Negative-feedback_amplifier

   Paul Voigt patented a negative feedback amplifier in January 1924, though his theory lacked detail. [4] Harold Stephen Black independently invented the negative-feedback amplifier while he was a passenger on the Lackawanna Ferry (from Hoboken Terminal to Manhattan) on his way to work at Bell Laboratories (located in Manhattan instead of New Jersey in 1927) on August 2, 1927 [5] (US Patent ...

5. 10.2 surround sound - Wikipedia

   en.wikipedia.org/wiki/10.2_surround_sound

   10.2 is the surround sound format developed by THX creator Tomlinson Holman of TMH Labs and the University of Southern California (schools of Cinematic Arts and Engineering). ). Developed along with Chris Kyriakakis of the USC Viterbi School of Engineering, 10.2 refers to the format's slogan: "Twice as good as 5

6. Samsung Electronics - Wikipedia

   en.wikipedia.org/wiki/Samsung_Electronics

   It also debuted the 3D Home Theater (HT-C6950W) that allows the user to enjoy 3D image and surround sound at the same time. With the launch of 3D Home Theater, Samsung became the first company in the industry to have the full line of 3D offerings, including 3D television, 3D Blu-ray player, 3D content, and 3D glasses.

7. Intermediate frequency - Wikipedia

   en.wikipedia.org/wiki/Intermediate_frequency

   In double-conversion superheterodyne receivers, a first intermediate frequency of 10.7 MHz is often used, followed by a second intermediate frequency of 470 kHz (or 700 kHz with DYNAS [15]). There are triple conversion designs used in police scanner receivers, high-end communications receivers, and many point-to-point microwave systems.