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2. RCA - Wikipedia

   en.wikipedia.org/wiki/RCA

   RCA manufactured equipment for repairing radios, such as oscilloscopes. RCA Graphic Systems Division (GSD) was an early supplier of electronics designed for the printing and publishing industries. It contracted with German company Rudolf Hell to market adaptations of the Digiset photocomposition system as the Videocomp, and a Laser Color ...

3. History of radio - Wikipedia

   en.wikipedia.org/wiki/History_of_radio

   History of radio. The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of ...

4. RCA connector - Wikipedia

   en.wikipedia.org/wiki/RCA_connector

   The RCA connector [3] is a type of electrical connector commonly used to carry audio and video signals. The name RCA derives from the company Radio Corporation of America, which introduced the design in the 1930s. [4] The connector’s male plug and female jack are called RCA plug and RCA jack . It is also called RCA phono connector [5] or ...

5. Sound recording and reproduction - Wikipedia

   en.wikipedia.org/wiki/Sound_recording_and...

   Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording . Acoustic analog recording is achieved by a ...

6. Audio and video interfaces and connectors - Wikipedia

   en.wikipedia.org/wiki/Audio_and_video_interfaces...

   RCA Plugs for composite video (yellow) and stereo audio (white and red) RCA connectors, also known as phono connectors or phono plugs, are used for analog or digital audio or analog video. These were first used inside pre–World War II radio-phonographs to connect the turntable pickup to the radio chassis.

7. Wireless speaker - Wikipedia

   en.wikipedia.org/wiki/Wireless_speaker

   Wireless speaker. A JBL Flip 3 battery-powered and waterproof Bluetooth speaker connected to a charging cable. The length is ca. 17 cm, diameter 6.4 cm, weight 450 g. TV set (size 55 inch) with two Sonos Play:5 wireless HiFi speakers (WiFi-based) and a soundbar. Wireless speakers are loudspeakers that receive audio signals using radio frequency ...