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2. List of Bose home audio products - Wikipedia

   en.wikipedia.org/wiki/List_of_Bose_home_audio...

   The equaliser, connected between pre-amplifier output and power amplifier input, effectively flattens the speaker frequency response. [26] Each speaker has nine identical 4-inch drivers per channel — one on the front for direct sound, and eight on the rear designed to produce reflected sound. [23] [27]

3. Sonos - Wikipedia

   en.wikipedia.org/wiki/Sonos

   November 2009 – the ZonePlayer S5 (later PLAY:5), the first independent Sonos-connected amplified speaker. [55] July 2011 – the Play:3, a second, smaller, amplified speaker in its Play lineup of smart speakers. [56] [57] May 2012 – the SUB wireless subwoofer. [58] February 2013 – the PLAYBAR soundbar speaker. [59]

4. Polk Audio - Wikipedia

   en.wikipedia.org/wiki/Polk_Audio

   The Monitor 12 was quite capable for its day, having bass response to 18 Hz, a free-air mounted tweeter, and 500-watt RMS power handling. Later Polk speaker models used arrays of drivers—Stereo Dimensional Array (SDA)—to cancel the crosstalk from the left speaker to the right ear and from the right speaker to the left ear, so as to expand ...

5. Amazon just slashed prices on LG soundbars and subwoofer ...

   www.aol.com/lifestyle/amazon-just-slashed-prices...

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6. 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 ...

7. 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 ...