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  2. Betamax - Wikipedia

    en.wikipedia.org/wiki/Betamax

    Betamax (also known as Beta, as in its logo) is a consumer-level analog recording and cassette format of magnetic tape for video, commonly known as a video cassette recorder. It was developed by Sony and was released in Japan on May 10, 1975, [1] followed by the US in November of the same year. Betamax is widely considered to be obsolete ...

  3. Subwoofer - Wikipedia

    en.wikipedia.org/wiki/Subwoofer

    Subwoofer. 12-inch (30 cm) subwoofer driver (loudspeaker). A driver is commonly installed in an enclosure (often a wooden cabinet) to prevent the sound waves coming off the back of the driver diaphragm from canceling out the sound waves being generated from the front of the subwoofer.

  4. List of Bose shelf stereos - Wikipedia

    en.wikipedia.org/wiki/List_of_Bose_shelf_stereos

    The Wave systems use a folded waveguide (a series of passages from the speaker driver to the speaker grill). The waveguide is claimed to improve low-frequency sound "from a small enclosure by guiding air through two 26” folded wave guides". Acoustic Wave Music System Bose Acoustic Wave Music System CD-3000 with CD player and FM radio

  5. Loudspeaker - Wikipedia

    en.wikipedia.org/wiki/Loudspeaker

    Loudspeaker. The hole below the lowest woofer is a port for a bass reflex system. A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer [1] : 597 that converts an electrical audio signal into a corresponding sound. [2] A speaker system, also often simply referred to as a speaker or loudspeaker ...

  6. 5.1 surround sound - Wikipedia

    en.wikipedia.org/wiki/5.1_surround_sound

    The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. It uses five full bandwidth channels and one low-frequency effects channel (the "point one").

  7. Audio power amplifier - Wikipedia

    en.wikipedia.org/wiki/Audio_power_amplifier

    Audio power amplifiers are found in all manner of sound systems including sound reinforcement, public address, home audio systems and musical instrument amplifiers like guitar amplifiers. It is the final electronic stage in a typical audio playback chain before the signal is sent to the loudspeakers.