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  2. 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 ...

  3. Acoustic homing - Wikipedia

    en.wikipedia.org/wiki/Acoustic_homing

    Acoustic homing is the process in which a system uses the sound or acoustic signals of a target or destination to guide a moving object. There are two types of acoustic homing: passive acoustic homing and active acoustic homing. Objects using passive acoustic homing rely on detecting acoustic emissions produced by the target.

  4. White van speaker scam - Wikipedia

    en.wikipedia.org/wiki/White_van_speaker_scam

    The white van speaker scam is a scam sales technique in which a con artist makes a buyer believe they are getting a good price on home entertainment products. Often a con artist will buy inexpensive, generic speakers [1] and convince potential buyers that they are premium products worth hundreds or thousands of dollars, offering them for sale at a price that the buyer thinks is heavily ...

  5. Active vs. Passive: The Case for Both and a Place for Both - AOL

    www.aol.com/news/active-vs-passive-case-both...

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  6. Audio crossover - Wikipedia

    en.wikipedia.org/wiki/Audio_crossover

    A passive crossover circuit is often mounted in a speaker enclosure to split up the amplified signal into a lower-frequency signal range and a higher-frequency signal range. A passive crossover splits up an audio signal after it is amplified by a single power amplifier, so that the amplified signal can be sent to two or more driver types, each ...

  7. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    Modern active noise control is generally achieved through the use of analog circuits or digital signal processing. Adaptive algorithms are designed to analyze the waveform of the background aural or nonaural noise, then based on the specific algorithm generate a signal that will either phase shift or invert the polarity of the original signal.

  8. Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/.../Constant-voltage_speaker_system

    Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...

  9. The best passive bookshelf speakers for most people - AOL

    www.aol.com/news/the-best-passive-bookshelf...

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