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2. Digital Sound System 80 - Wikipedia

   en.wikipedia.org/wiki/Digital_Sound_System_80

   System type: Biamplified, stereophonic speakers and dual voice coil subwoofer; Amplification: High efficiency, class-D switch-mode power amplifier; Rated power output (per IEC 268.3): Subwoofer: 44 W; Left/Right Speakers: 32 W, 16 W per speaker; Frequency response: 40 Hz to 20,000 Hz; Transducers:

3. Computer speakers - Wikipedia

   en.wikipedia.org/wiki/Computer_speakers

   More sophisticated computer speakers can have a subwoofer unit to enhance bass output. The larger subwoofer enclosure usually contains the amplifiers for the subwoofer and the left and right speakers. Some computer displays have rather basic speakers built-in. Laptop computers have built-in integrated speakers, usually small and of restricted ...

4. 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 ...

5. 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]

6. 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 ...

7. Amplifier - Wikipedia

   en.wikipedia.org/wiki/Amplifier

   An amplifier whose output exhibits no feedback to its input side is described as 'unilateral'. The input impedance of a unilateral amplifier is independent of load, and output impedance is independent of signal source impedance. [33] An amplifier that uses feedback to connect part of the output back to the input is a bilateral amplifier ...