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  2. JBL - Wikipedia

    en.wikipedia.org/wiki/JBL

    The first original product was the D130, a 15-inch transducer for which a variant remained in production for the next 55 years. The D130 featured a 4-inch (100 mm) flat ribbon wire voice coil and Alnico V magnet. Two other products were the 12-inch (300 mm) D131 and the 8-inch (200 mm) D208 cone drivers.

  3. JL Audio - Wikipedia

    en.wikipedia.org/wiki/JL_Audio

    The W3 Series: These subwoofers come in five different sizes ranging from the 6-inch to the 18-inch. Each component subwoofer has the option of being 2-ohm, 4-ohm, or 8-ohm. The W3 series showcases the DMA optimized motor system and an elevated frame cooling. [15] The W5 Series: Higher-powered speakers that were received incredibly well when ...

  4. Surround sound - Wikipedia

    en.wikipedia.org/wiki/Surround_sound

    In the original movie theater implementation, the LFE was a separate channel fed to one or more subwoofers. Home replay systems, however, may not have a separate subwoofer, so modern home surround decoders and systems often include a bass management system that allows bass on any channel (main or LFE) to be fed only to the loudspeakers that can ...

  5. 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 ...

  6. Wireless speaker - Wikipedia

    en.wikipedia.org/wiki/Wireless_speaker

    Recent models generally use Bluetooth 4.0 or even Bluetooth 5, and wireless speakers generally have a range of 10 meters. [4] Bluetooth devices use a radio communication frequency such that the devices do not have to be in a visual line of sight with each other. Some speakers may benefit from the NFC system to facilitate pairing with the source ...

  7. Rotary woofer - Wikipedia

    en.wikipedia.org/wiki/Rotary_woofer

    A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch (angle) of the blades of an impeller rotating at a constant speed. The pitch of the fan blades is controlled by the audio signal presented to the voice coil, and is able to swing ...

  8. 7.1 surround sound - Wikipedia

    en.wikipedia.org/wiki/7.1_surround_sound

    However, whereas a 5.1 surround sound system combines both surround and rear channel effects into two channels (commonly configured in home theatre set-ups as two rear surround speakers), a 7.1 surround system splits the surround and rear channel information into four distinct channels, in which sound effects are directed to left and right ...

  9. Walmart - Wikipedia

    en.wikipedia.org/wiki/Walmart

    Walmart opened Supermercado de Walmart locations to appeal to Hispanic communities in the United States. [164] The first one, a 39,000-square-foot (3,600-square-meter) store in the Spring Branch area of Houston, opened on April 29, 2009. [165] The store was a conversion of an existing Walmart Neighborhood Market. [166]

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