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  2. Audio and video interfaces and connectors - Wikipedia

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

    F connectors, also known as RF connectors, were the standard analog connector of the analog era in the Americas, used primarily with coaxial cable (RG-59 and RG-6), and have been repurposed for generic digital data connections. SCART was the standard connector of the analog era in Europe. S-Video was an improvement over the F connector.

  3. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...

  4. Industrial and multiphase power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/Industrial_and_multiphase...

    The normal technical term (in both British and International English) for an AC power socket is socket-outlet, [4] but in non-technical common use a number of other terms are used. In British English the general term is socket, but there are numerous common alternatives, including power point, [5] plug socket, [6] wall socket, [7] and wall plug ...

  5. Subwoofer - Wikipedia

    en.wikipedia.org/wiki/Subwoofer

    Small subwoofer drivers in the 4-inch range are typically used in small computer speaker systems and compact home-cinema subwoofer cabinets. The size of the driver and number of drivers in a cabinet depends on the design of the loudspeaker enclosure , the size of the cabinet, the desired sound pressure level, the lowest frequency targeted and ...

  6. IEC 60309 - Wikipedia

    en.wikipedia.org/wiki/IEC_60309

    The pilot pin is located in the centre of main contact circle on 4- and 5-pin connectors. On 3-pin (2P+E) connectors, it is located on the contact circle opposite the ground pin. The other connectors are located 105° on either side of the earth pin, rather than 120° as in the smaller variants, to make room for the pilot pin.

  7. Loudspeaker enclosure - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker_enclosure

    In a closed-box loudspeaker, the air inside the box acts as a spring, returning the cone to the zero position in the absence of a signal. A significant increase in the effective volume of a closed-box loudspeaker can be achieved by a filling of fibrous material, typically fiberglass, bonded acetate fiber (BAF) or long-fiber wool.