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  2. Twelve-inch single - Wikipedia

    en.wikipedia.org/wiki/Twelve-inch_single

    A twelve-inch Capitol Records gramophone record. The twelve-inch single (often written as 12-inch or 12″) is a type of vinyl (polyvinyl chloride or PVC) gramophone record that has wider groove spacing and shorter playing time with a "single" or a few related sound tracks on each surface, compared to LPs (long play) which have several songs on each side.

  3. Talk:Twelve-inch single - Wikipedia

    en.wikipedia.org/wiki/Talk:Twelve-inch_single

    It was somewhat helped by the fact that Factory did not release a seven-inch version of the single until 1988, five years after the single was originally released as a twelve-inch-only release. Besides, the seven-inch version that was released was not the original 1983 version released on twelve-inch, but a re-recording called "Blue Monday 1988".

  4. List of Bose shelf stereos - Wikipedia

    en.wikipedia.org/wiki/List_of_Bose_shelf_stereos

    Bose Acoustic Wave Music System CD-3000 with CD player and FM radio. The first "Wave" product was the "Acoustic Wave Music System" (AWMS-1), which was a tabletop mini-hifi system that was introduced in 1984. The AWMS-1 consisted of an AM/FM radio, cassette player, two 2-inch tweeters, and a four-inch woofer. [2]

  5. Thermoacoustic heat engine - Wikipedia

    en.wikipedia.org/wiki/Thermoacoustic_heat_engine

    Thermoacoustic engines (sometimes called "TA engines") are thermoacoustic devices which use high-amplitude sound waves to pump heat from one place to another (this requires work, which is provided by the loudspeaker) or use a heat difference to produce work in the form of sound waves (these waves can then be converted into electrical current ...

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  7. Rotary woofer - Wikipedia

    en.wikipedia.org/wiki/Rotary_woofer

    A rotary woofer is designed to produce only frequencies lower than 20 Hz; distortion increases as the input frequency exceeds the fan's rotation rate (20 Hz would be about 1200 rpm for the fan). Fan RPM is limited to reduce the constant noise generated by the fan blades. Current models typically spin at around 800 RPM (13 Hz).

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