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  2. Western Electric (tube manufacturer) - Wikipedia

    en.wikipedia.org/wiki/Western_Electric_(tube...

    In 2022, Western Electric began production of the 91E amplifier system, employing the 300B tube in a single ended configuration. The amplifier is a high-end model designed for audiophiles, costing $15,000 or more. It can produce from 14 to 20 watts (at 8 ohms) per channel. This is considerably more than the standard 10w per channel from a ...

  3. 300B - Wikipedia

    en.wikipedia.org/wiki/300B

    300B dimensions in mm In electronics , the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. It measures 6.4 in (16 cm) high and 2.4 in (6.1 cm) wide, and the anode can dissipate 40 watts thermal.

  4. Automated Processes, Inc. - Wikipedia

    en.wikipedia.org/wiki/Automated_Processes,_Inc.

    Automated Processes Inc. (API or API Audio) is an American company that designs, manufactures, and markets mixing consoles and signal processors, including modular signal processor units in the 500-series format standard that evolved from early API mixing consoles.

  5. Home audio - Wikipedia

    en.wikipedia.org/wiki/Home_audio

    These typically included a record deck, tuner, dual cassette deck, amplifier and separate speakers. Some later midi systems also included a CD player in the main unit in addition to the turntable. [7] [4] The compact disc first appeared in the early 1980s, and because they were small, they were increasingly integrated into cheap all-in-one ...

  6. Optonica - Wikipedia

    en.wikipedia.org/wiki/Optonica

    Optonica amplifier (SM-3636) and tuner (ST-3636) from 1978. The Optonica brand was created and first launched by Sharp of Japan in 1975 to compete in the high-end audio market along with established brands such as Sansui Electric, Sony, Panasonic, Sanyo, Yamaha, Nakamichi, Onkyo, Fisher Electronics, Technics (brand), Pioneer Corporation, Kenwood Corporation, JVC, Harman Kardon and Marantz.

  7. Category:Audio amplifier manufacturers - Wikipedia

    en.wikipedia.org/wiki/Category:Audio_amplifier...

    Companies that manufacture equipment used for the amplification of audio signals, such as a signal emanating from a mixing console, DJ mixer or Compact Disc player in order to produce audible sound through loudspeakers.