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  2. Subwoofer - Wikipedia

    en.wikipedia.org/wiki/Subwoofer

    From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...

  3. Powered speakers - Wikipedia

    en.wikipedia.org/wiki/Powered_speakers

    An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...

  4. Vehicle audio - Wikipedia

    en.wikipedia.org/wiki/Vehicle_audio

    Subwoofers: These speakers are designed to reproduce low-frequency sounds, particularly bass. They come in various sizes and power levels, and can be used to enhance the bass in a car audio system. Mid-range speakers: These speakers are designed to reproduce mid-range frequencies, such as vocals and instruments like guitars and pianos.

  5. I drove a $42,000 Mazda CX-50. These 14 features made it one ...

    www.aol.com/news/drove-42-000-mazda-cx-100002615...

    The CX-50 Hybrid is powered by a 2.5-liter, 176-horsepower, naturally aspirated four-cylinder engine paired with a 118-horsepower electric motor up front, a 54-horsepower unit on the rear axle ...

  6. Jeep Liberty (KK) - Wikipedia

    en.wikipedia.org/wiki/Jeep_Liberty_(KK)

    Options such as leather-trimmed seating surfaces, heated power dual front bucket seats, eight-speaker premium sound system with an Infinity subwoofer, touch-screen sound system, the Sky-Slider fabric sunroof, and 18-inch chrome-clad alloy wheels mounted on all-season tires. The Liberty KK was offered in five special edition models:

  7. Phonocar - Wikipedia

    en.wikipedia.org/wiki/Phonocar

    The main power-supply filter is constituted of 12 electrolytics of 2,200 microfarad/25 V, similar to the 105° computer-grade. There is a TL-494 providing for the switching frequency necessary for the four transformers with double E-core. The power section shows a row of 16 semi-conductors in TO-220P and 8 Mosfets in TO-3P packages.